{ "area": { "code": "12000", "name": "千葉県", "slug": "chiba" }, "structure": { "id": "rc", "name": "鉄筋コンクリート造" }, "segment": { "segment": "rental", "building_type": "apartment", "label": "貸家・共同住宅" }, "unit": { "price_per_tsubo": "万円/坪", "price_per_sqm": "円/㎡", "cost": "万円", "floor": "㎡", "yoy": "%" }, "formula": "price_per_tsubo = cost_total / floor_total * 3.30579", "formula_real": "price_per_tsubo_real = price_per_tsubo / deflator * 100 (MLIT construction cost deflator for housing of the same structure, FY2020 = 100)", "source": "https://www.e-stat.go.jp/stat-search/files?page=1&toukei=00600120&tstat=000001016966&cycle=8", "last_verified_at": "2026-10-13T11:03:37.415Z", "provisional": { "fiscal_year": 2026, "through_month": "2026-08", "months": 5, "units": 1424, "price_per_tsubo": 145.13207295509477, "prev_price_per_tsubo": 135.9555799394641, "change_vs_prev": 6.74962588495201, "note": "Sum of monthly preliminary releases from April; replaced by the annual report." }, "years": [ { 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