{"dataset":"cpi-tokyo","measure":"yoy","unit":"%","trust":"derived","calc":"(index[t] / index[t−12 months] − 1) × 100, from published index values.","release":{"release_id":347,"label":"Data through September 2026","latest_period":"2026-09-01","ingested_at":"2026-10-23T13:16:14.385491Z","sha256":"910cf39c44e2c593d207a81787a429bb2332ab55d5284161f69148aee96177d0","download_url":"https://www.e-stat.go.jp/stat-search/file-download?statInfId=000040482965&fileKind=1","retrieved_at":"2026-10-23T13:16:14.385491Z","source_name":"CPI Japan, Tokyo ward area, Table 1: middle-class indices (Jan 1970 – latest month), 2025 base","source_page":"https://www.e-stat.go.jp/stat-search/files?stat_infid=000040482965","source_id":"e-stat:000040482965","base":"2025=100","frequency":"monthly","published_at":null,"status":"published","known_at":"2026-10-23T13:16:14.385491Z","known_at_basis":"our fetch","coverage_start":"1970-01-01"},"series":[{"code":"0001","name_en":"All 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