{
  "meta": {
    "schema_version": "0.16",
    "generated_at": "2026-09-07T10:44:35+00:00",
    "coverage": "Tokyo 23 wards",
    "period": "2025 (calendar year, all quarters)",
    "sources": [
      {
        "id": "XIT001",
        "name": "不動産価格情報取得",
        "api_id": "XIT001",
        "license": "PDL1.0",
        "url": "https://www.reinfolib.mlit.go.jp/"
      },
      {
        "id": "XIT002",
        "name": "都道府県内市区町村一覧",
        "api_id": "XIT002",
        "license": "PDL1.0",
        "url": "https://www.reinfolib.mlit.go.jp/"
      },
      {
        "id": "XPT002",
        "name": "地価公示・地価調査ポイント",
        "api_id": "XPT002",
        "license": "PDL1.0",
        "url": "https://www.reinfolib.mlit.go.jp/"
      },
      {
        "id": "estat_population",
        "name": "e-Stat 人口・世帯数",
        "api_id": "e-Stat",
        "license": "e-Stat利用規約 (政府標準利用規約2.0準拠 / CC BY 4.0互換)",
        "url": "https://www.e-stat.go.jp/"
      }
    ],
    "attribution_ja": "出典：国土交通省 不動産情報ライブラリ（https://www.reinfolib.mlit.go.jp/）を加工して作成",
    "source_credits_ja": [
      "このサービスは、国土交通省の不動産情報ライブラリのAPI機能を使用していますが、提供情報の最新性、正確性、完全性等が保証されたものではありません",
      "出典：政府統計の総合窓口(e-Stat)（https://www.e-stat.go.jp/）を加工して作成"
    ],
    "disclaimer_ja": "このサービスは、国土交通省の不動産情報ライブラリのAPI機能を使用していますが、提供情報の最新性、正確性、完全性等が保証されたものではありません",
    "disclaimer_en": "This service uses the API of the Real Estate Information Library provided by the Ministry of Land, Infrastructure, Transport and Tourism (MLIT) of Japan. MLIT does not guarantee the timeliness, accuracy or completeness of the provided information.",
    "fixture_derived": true,
    "definitions": {
      "by_type[].price_per_sqm.median_jpy": {
        "description": "Median transaction price per square metre, separated by property type and price basis.",
        "unit": "JPY/sqm",
        "min_sample_size": 5
      },
      "by_type[].total_price.median_jpy": {
        "description": "Median total transaction price within one property type.",
        "unit": "JPY",
        "min_sample_size": 5
      },
      "by_type[].area.median_sqm": {
        "description": "Median exact source Area within one property type; area definitions are never mixed across types and ambiguous Area=9999 placeholders are excluded.",
        "unit": "sqm",
        "min_sample_size": 5
      },
      "transactions.excluded_ambiguous_area_count": {
        "description": "Number of city-level transaction records whose ambiguous Area=9999 placeholder was excluded from exact-area metrics, before district sample-size suppression.",
        "unit": "records"
      },
      "by_type[].area.excluded_ambiguous_count": {
        "description": "Number of records within one property type whose ambiguous Area=9999 placeholder was excluded from that area's count and median.",
        "unit": "records"
      },
      "by_type[].price_per_sqm.excluded_ambiguous_count": {
        "description": "Number of records excluded from this price-per-square-metre metric because its derived basis required Area and Area was the ambiguous 9999 placeholder; always zero for source UnitPrice and not-applicable bases.",
        "unit": "records"
      },
      "by_type[].price_yoy.value_pct": {
        "description": "Year-over-year percentage change in the unrounded price-per-square-metre median for the same municipality, exact source Type, and price basis. Both years independently require the minimum sample size; this is an observed comparison, not a market index.",
        "unit": "percent",
        "min_sample_size_per_year": 5
      },
      "by_type[].price_cagr_3y.value_pct": {
        "description": "Three-year compound annual growth rate from unrounded endpoint A03 medians in the same municipality, exact source Type, and price basis. All four calendar years independently require the minimum sample size; intermediate years are eligibility gates, not formula inputs, and this is not a market index.",
        "unit": "percent",
        "elapsed_years": 3,
        "calendar_year_count": 4,
        "min_sample_size_per_year": 5
      },
      "by_type[].price_cagr_5y.value_pct": {
        "description": "Five-year compound annual growth rate from unrounded endpoint A03 medians in the same municipality, exact source Type, and price basis. All six calendar years independently require the minimum sample size; intermediate years are eligibility gates, not formula inputs, and this is not a market index.",
        "unit": "percent",
        "elapsed_years": 5,
        "calendar_year_count": 6,
        "min_sample_size_per_year": 5
      },
      "by_type[].price_vs_peak.value_pct": {
        "description": "Percentage position calculated as ((M_current / max(M_window)) - 1) * 100 using exact unrounded A03 decimal/rational medians in the rolling ten-calendar-year window for the same municipality, exact source Type, and price basis. Every year requires N>=5; exact ties are listed separately, and the final value is rounded once to one decimal place with ties-to-even. This is not a market index, upside estimate, or forecast.",
        "unit": "percent",
        "calendar_year_count": 10,
        "min_sample_size_per_year": 5
      },
      "land_prices.by_land_price_type[].by_use_category[].official_land_price_yoy.median_pct": {
        "description": "Median of XPT002 source-provided year-on-year change rates for active official appraisal points in the same municipality, year, land-price system, and use category. It is not recalculated from city medians and is not a transaction-popularity or investment-return measure.",
        "unit": "percent",
        "min_sample_size": 5
      },
      "land_prices.market_to_official_ratio[].ratio": {
        "description": "Ratio of the unrounded calendar-year median UnitPrice for mapped land-only transactions to the unrounded official-point current-price median for the same municipality and mapped use. Land-price systems remain separate, both groups require N>=5, and this differing-population comparison is not a parcel appraisal, investment return, or ranking.",
        "unit": "ratio",
        "min_sample_size_per_group": 5
      },
      "pre_owned_condominium.by_building_age_band[].price_per_sqm.median_jpy": {
        "description": "Median pre-owned-condominium transaction price per square metre within a fixed building-age band. Building age is the transaction year minus a valid four-digit BuildingYear, and all four bands are always returned.",
        "unit": "JPY/sqm",
        "min_sample_size": 5
      },
      "pre_owned_condominium.renovation_observed_median_difference.value_pct": {
        "description": "Unadjusted observed percentage difference calculated as ((M_done / M_not_yet) - 1) * 100 from exact unrounded TradePrice/Area A03 medians for pre-owned-condominium records whose source Renovation value exactly equals Done or Not yet. Not yet is always the denominator, both groups require N>=5, and the final value is rounded once to one decimal place with ties-to-even. The groups are not adjusted for building age, location, area, floor plan, floor, or transaction timing; this is not a causal renovation effect, renovation premium, return on investment, parcel appraisal, forecast, ranking, or recommendation.",
        "unit": "percent",
        "min_sample_size_per_group": 5
      },
      "pre_owned_condominium.building_year_exclusions": {
        "description": "Counts of pre-owned-condominium records excluded from building-age bands because BuildingYear was empty, unparsable, zero, or later than the transaction year.",
        "unit": "records"
      },
      "districts[].price_per_sqm.excluded_ambiguous_count": {
        "description": "Number of records in this published district and property-type group excluded from its price-per-square-metre metric because its derived basis required Area and Area was the ambiguous 9999 placeholder.",
        "unit": "records"
      },
      "by_land_price_type[].median_price_per_sqm_jpy": {
        "description": "Median official land price per square metre, separated by valuation institution and date.",
        "unit": "JPY/sqm",
        "min_sample_size": 5
      }
    },
    "notes": [
      "Prices are derived statistics computed from individual transaction records; they are not published by MLIT in this form.",
      "district_code_source is the source-side code and is not guaranteed to be stable across MLIT data updates.",
      "e-Stat area-code equivalence with 全国地方公共団体コード is unverified; only exact configured values that match the existing municipal key are joined.",
      "market_to_official_ratio compares a calendar-year transaction sample with official points observed on January 1 or July 1; it does not indicate parcel underpricing, overpricing, investment return, future price, or a municipality ranking.",
      "price_vs_peak compares observed A03 medians within a rolling ten-calendar-year window; it is not a market index, transaction-popularity measure, estimate of upside, investment return, parcel appraisal, or future-price forecast.",
      "renovation_observed_median_difference is an unadjusted comparison of distinct pre-owned-condominium groups; source Renovation labels do not describe work scope, cost, timing, or quality, and the result is not a causal effect, premium, return, appraisal, forecast, ranking, or recommendation.",
      "FIXTURE DATA ONLY — numbers are intentionally fake and are not real MLIT data."
    ]
  },
  "data": [
    {
      "city_code": "13101",
      "city_name_en": "Fixture Chiyoda",
      "city_name_ja": "架空千代田区",
      "prefecture_en": "Tokyo",
      "prefecture_ja": "東京都",
      "year": 2025,
      "transactions": {
        "count": 39,
        "count_with_area": 39,
        "excluded_ambiguous_area_count": 0,
        "by_type": [
          {
            "type": "Pre-owned Condominiums, etc.",
            "count": 19,
            "price_per_sqm": {
              "basis": "derived_trade_price_per_exclusive_area",
              "count": 19,
              "median_jpy": 1299342,
              "excluded_ambiguous_count": 0
            },
            "price_yoy": {
              "value_pct": null,
              "current_year": 2025,
              "previous_year": 2024,
              "current_price_count": 19,
              "previous_price_count": null,
              "min_sample_size": 5,
              "omitted_reason": "incomplete_period"
            },
            "price_cagr_3y": {
              "value_pct": null,
              "current_year": 2025,
              "start_year": 2022,
              "elapsed_years": 3,
              "annual_price_counts": [
                {
                  "year": 2022,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2023,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2024,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2025,
                  "transaction_count": 19,
                  "price_count": 19,
                  "excluded_ambiguous_count": 0
                }
              ],
              "min_sample_size": 5,
              "omitted_reason": "incomplete_period"
            },
            "price_cagr_5y": {
              "value_pct": null,
              "current_year": 2025,
              "start_year": 2020,
              "elapsed_years": 5,
              "annual_price_counts": [
                {
                  "year": 2020,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2021,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2022,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2023,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2024,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2025,
                  "transaction_count": 19,
                  "price_count": 19,
                  "excluded_ambiguous_count": 0
                }
              ],
              "min_sample_size": 5,
              "omitted_reason": "incomplete_period"
            },
            "price_vs_peak": {
              "value_pct": null,
              "current_year": 2025,
              "window_start_year": 2016,
              "window_end_year": 2025,
              "calendar_year_count": 10,
              "peak_years": [],
              "is_current_peak": null,
              "annual_price_counts": [
                {
                  "year": 2016,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2017,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2018,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2019,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2020,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2021,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2022,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2023,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2024,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2025,
                  "transaction_count": 19,
                  "price_count": 19,
                  "excluded_ambiguous_count": 0
                }
              ],
              "min_sample_size": 5,
              "omitted_reason": "incomplete_period"
            },
            "total_price": {
              "count": 19,
              "median_jpy": 98750000
            },
            "area": {
              "count": 19,
              "median_sqm": 76.0,
              "excluded_ambiguous_count": 0
            }
          },
          {
            "type": "Residential Land(Land Only)",
            "count": 5,
            "price_per_sqm": {
              "basis": "source_unit_price_land_area",
              "count": 5,
              "median_jpy": 1120000,
              "excluded_ambiguous_count": 0
            },
            "price_yoy": {
              "value_pct": null,
              "current_year": 2025,
              "previous_year": 2024,
              "current_price_count": 5,
              "previous_price_count": null,
              "min_sample_size": 5,
              "omitted_reason": "incomplete_period"
            },
            "price_cagr_3y": {
              "value_pct": null,
              "current_year": 2025,
              "start_year": 2022,
              "elapsed_years": 3,
              "annual_price_counts": [
                {
                  "year": 2022,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2023,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2024,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2025,
                  "transaction_count": 5,
                  "price_count": 5,
                  "excluded_ambiguous_count": 0
                }
              ],
              "min_sample_size": 5,
              "omitted_reason": "incomplete_period"
            },
            "price_cagr_5y": {
              "value_pct": null,
              "current_year": 2025,
              "start_year": 2020,
              "elapsed_years": 5,
              "annual_price_counts": [
                {
                  "year": 2020,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2021,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2022,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2023,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2024,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2025,
                  "transaction_count": 5,
                  "price_count": 5,
                  "excluded_ambiguous_count": 0
                }
              ],
              "min_sample_size": 5,
              "omitted_reason": "incomplete_period"
            },
            "price_vs_peak": {
              "value_pct": null,
              "current_year": 2025,
              "window_start_year": 2016,
              "window_end_year": 2025,
              "calendar_year_count": 10,
              "peak_years": [],
              "is_current_peak": null,
              "annual_price_counts": [
                {
                  "year": 2016,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2017,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2018,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2019,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2020,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2021,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2022,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2023,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2024,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2025,
                  "transaction_count": 5,
                  "price_count": 5,
                  "excluded_ambiguous_count": 0
                }
              ],
              "min_sample_size": 5,
              "omitted_reason": "incomplete_period"
            },
            "total_price": {
              "count": 5,
              "median_jpy": 120000000
            },
            "area": {
              "count": 5,
              "median_sqm": 93.0,
              "excluded_ambiguous_count": 0
            }
          },
          {
            "type": "Residential Land(Land and Building)",
            "count": 15,
            "price_per_sqm": {
              "basis": "not_applicable",
              "count": 0,
              "median_jpy": null,
              "excluded_ambiguous_count": 0,
              "omitted_reason": "land_and_building_value_not_separable"
            },
            "price_yoy": {
              "value_pct": null,
              "current_year": 2025,
              "previous_year": 2024,
              "current_price_count": 0,
              "previous_price_count": null,
              "min_sample_size": 5,
              "omitted_reason": "land_and_building_value_not_separable"
            },
            "price_cagr_3y": {
              "value_pct": null,
              "current_year": 2025,
              "start_year": 2022,
              "elapsed_years": 3,
              "annual_price_counts": [
                {
                  "year": 2022,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2023,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2024,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2025,
                  "transaction_count": 15,
                  "price_count": 0,
                  "excluded_ambiguous_count": 0,
                  "omitted_reason": "land_and_building_value_not_separable"
                }
              ],
              "min_sample_size": 5,
              "omitted_reason": "land_and_building_value_not_separable"
            },
            "price_cagr_5y": {
              "value_pct": null,
              "current_year": 2025,
              "start_year": 2020,
              "elapsed_years": 5,
              "annual_price_counts": [
                {
                  "year": 2020,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2021,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2022,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2023,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2024,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2025,
                  "transaction_count": 15,
                  "price_count": 0,
                  "excluded_ambiguous_count": 0,
                  "omitted_reason": "land_and_building_value_not_separable"
                }
              ],
              "min_sample_size": 5,
              "omitted_reason": "land_and_building_value_not_separable"
            },
            "price_vs_peak": {
              "value_pct": null,
              "current_year": 2025,
              "window_start_year": 2016,
              "window_end_year": 2025,
              "calendar_year_count": 10,
              "peak_years": [],
              "is_current_peak": null,
              "annual_price_counts": [
                {
                  "year": 2016,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
                },
                {
                  "year": 2017,
                  "transaction_count": null,
                  "price_count": null,
                  "excluded_ambiguous_count": null,
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      },
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            "omitted_reason": "no_official_points"
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        "source_note": "令和7年国勢調査 速報集計（総務省統計局、2026-05-29公表）。速報値であり確定値で置き換わる。",
        "unit": {
          "total_population": "人",
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    },
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            "min_sample_size_per_group": 5,
            "omitted_reason": "no_transactions"
          }
        }
      },
      "land_prices": {
        "count": 1,
        "count_with_price": 1,
        "excluded_paused_count": 0,
        "year": 2025,
        "by_land_price_type": [
          {
            "land_price_type": 0,
            "label": "koji",
            "valuation_date": "令和7年1月1日",
            "count": 1,
            "count_with_price": 1,
            "median_price_per_sqm_jpy": null,
            "by_use_category": [
              {
                "use_category": "商業地",
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                "count_with_price": 1,
                "median_price_per_sqm_jpy": null,
                "official_land_price_yoy": {
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                },
                "omitted_reason": "below_sample_threshold"
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              "omitted_reason": "below_sample_threshold"
            },
            "omitted_reason": "below_sample_threshold"
          }
        ],
        "omitted_reason": "below_sample_threshold",
        "market_to_official_ratio": [
          {
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            "basis": "annual_land_only_unit_price_median_to_official_point_price_median",
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              "omitted_reason": "no_transactions"
            },
            "official": {
              "observation_date": "2025-01-01",
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              "omitted_reason": "no_official_points"
            },
            "omitted_reason": "no_transactions"
          },
          {
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            "min_sample_size_per_group": 5,
            "transaction": {
              "region_group": "commercial",
              "period": "2025-01-01/2025-12-31",
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              "omitted_reason": "no_transactions"
            },
            "official": {
              "observation_date": "2025-01-01",
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              "omitted_reason": "below_sample_threshold"
            },
            "omitted_reason": "no_transactions"
          },
          {
            "land_price_type": 1,
            "label": "prefectural_survey",
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            "basis": "annual_land_only_unit_price_median_to_official_point_price_median",
            "ratio": null,
            "min_sample_size_per_group": 5,
            "transaction": {
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              "period": "2025-01-01/2025-12-31",
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              "omitted_reason": "no_transactions"
            },
            "official": {
              "observation_date": "2025-07-01",
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              "omitted_reason": "no_official_points"
            },
            "omitted_reason": "no_transactions"
          },
          {
            "land_price_type": 1,
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            "basis": "annual_land_only_unit_price_median_to_official_point_price_median",
            "ratio": null,
            "min_sample_size_per_group": 5,
            "transaction": {
              "region_group": "commercial",
              "period": "2025-01-01/2025-12-31",
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              "omitted_reason": "no_transactions"
            },
            "official": {
              "observation_date": "2025-07-01",
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              "omitted_reason": "no_official_points"
            },
            "omitted_reason": "no_transactions"
          }
        ]
      },
      "population": {
        "total_population": 22222,
        "total_population_count": 1,
        "households": 66666,
        "households_count": 1,
        "period": "2025",
        "provisional": true,
        "source_note": "令和7年国勢調査 速報集計（総務省統計局、2026-05-29公表）。速報値であり確定値で置き換わる。",
        "unit": {
          "total_population": "人",
          "households": "世帯"
        }
      },
      "districts": []
    },
    {
      "city_code": "13103",
      "city_name_en": "Fixture Minato",
      "city_name_ja": "架空港区",
      "prefecture_en": "Tokyo",
      "prefecture_ja": "東京都",
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      "transactions": {
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        "excluded_ambiguous_area_count": 0,
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          {
            "type": "Pre-owned Condominiums, etc.",
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            },
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            },
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              ],
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              ],
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                {
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                {
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                {
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          },
          {
            "type": "Residential Land(Land and Building)",
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              "basis": "not_applicable",
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                {
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              ],
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                {
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                {
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              ],
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            }
          }
        ],
        "pre_owned_condominium": {
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          },
          "by_building_age_band": [
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              "building_age_band": "0-10",
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            },
            {
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            },
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          ],
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        }
      },
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            },
            "omitted_reason": "no_transactions"
          }
        ]
      },
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        "total_population": 33333,
        "total_population_count": 1,
        "households": 77777,
        "households_count": 1,
        "period": "2025",
        "provisional": true,
        "source_note": "令和7年国勢調査 速報集計（総務省統計局、2026-05-29公表）。速報値であり確定値で置き換わる。",
        "unit": {
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      },
      "districts": []
    },
    {
      "city_code": "13104",
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          {
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            },
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            },
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                },
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                },
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              ],
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                  "excluded_ambiguous_count": null,
                  "omitted_reason": "incomplete_period"
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                {
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                },
                {
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                },
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                  "omitted_reason": "incomplete_period"
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                  "omitted_reason": "incomplete_period"
                },
                {
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                },
                {
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                {
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                },
                {
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              ],
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              "omitted_reason": "land_and_building_value_not_separable"
            },
            "total_price": {
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              "median_jpy": null,
              "omitted_reason": "below_sample_threshold"
            },
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              "excluded_ambiguous_count": 0,
              "omitted_reason": "below_sample_threshold"
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          }
        ],
        "pre_owned_condominium": {
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            "out_of_range_source_value_count": 0
          },
          "by_building_age_band": [
            {
              "building_age_band": "0-10",
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              "price_per_sqm": {
                "basis": "derived_trade_price_per_exclusive_area",
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            },
            {
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            },
            {
              "building_age_band": "21-30",
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            },
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              "building_age_band": "31+",
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                "basis": "derived_trade_price_per_exclusive_area",
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            }
          ],
          "renovation_observed_median_difference": {
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            "denominator_status": "Not yet",
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              {
                "renovation_status": "Done",
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            ],
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          }
        }
      },
      "land_prices": {
        "count": 3,
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        "excluded_paused_count": 0,
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        "by_land_price_type": [
          {
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            "valuation_date": "令和7年1月1日",
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            "by_use_category": [
              {
                "use_category": "商業地",
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            ],
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          {
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        ],
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        "source_note": "令和7年国勢調査 速報集計（総務省統計局、2026-05-29公表）。速報値であり確定値で置き換わる。",
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      },
      "districts": []
    },
    {
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