{"updated": "2026-09-19", "item": "バター", "unit": "1箱･200g", "item_code": "1321", "source": "総務省統計局 小売物価統計調査（動向編）", "source_url": "https://www.stat.go.jp/data/kouri/", "license": "CC BY 4.0（数値）", "method": "81市の調査価格の月ごとの中央値。40市以上で値がある月だけ", "comparable": true, "ratio": 1.405, "from": {"month": "2020-01", "yen": 437}, "to": {"month": "2026-07", "yen": 614}, "months": [{"month": "2020-01", "yen": 437}, {"month": "2020-02", "yen": 437}, {"month": "2020-03", "yen": 437}, {"month": "2020-04", "yen": 437}, {"month": "2020-05", "yen": 440}, {"month": "2020-06", "yen": 440}, {"month": "2020-07", "yen": 440}, {"month": "2020-08", "yen": 439}, {"month": "2020-09", "yen": 440}, {"month": "2020-10", "yen": 438}, {"month": "2020-11", "yen": 437}, {"month": "2020-12", "yen": 437}, {"month": "2021-01", "yen": 437}, {"month": "2021-02", "yen": 437}, {"month": "2021-03", "yen": 439}, {"month": "2021-04", "yen": 437}, {"month": "2021-05", "yen": 439}, {"month": "2021-06", "yen": 436}, {"month": "2021-07", "yen": 437}, {"month": "2021-08", "yen": 437}, {"month": "2021-09", "yen": 437}, {"month": "2021-10", "yen": 437}, {"month": "2021-11", "yen": 436}, {"month": "2021-12", "yen": 436}, {"month": "2022-01", "yen": 436}, {"month": "2022-02", "yen": 436}, {"month": "2022-03", "yen": 436}, {"month": "2022-04", "yen": 430}, {"month": "2022-05", "yen": 431}, {"month": "2022-06", "yen": 430}, {"month": "2022-07", "yen": 430}, {"month": "2022-08", "yen": 430}, {"month": "2022-09", "yen": 429}, {"month": "2022-10", "yen": 429}, {"month": "2022-11", "yen": 429}, {"month": "2022-12", "yen": 429}, {"month": "2023-01", "yen": 430}, {"month": "2023-02", "yen": 429}, {"month": "2023-03", "yen": 429}, {"month": "2023-04", "yen": 483}, {"month": "2023-05", "yen": 484}, {"month": "2023-06", "yen": 484}, {"month": "2023-07", "yen": 489}, {"month": "2023-08", "yen": 490}, {"month": "2023-09", "yen": 488}, {"month": "2023-10", "yen": 490}, {"month": "2023-11", "yen": 484}, {"month": "2023-12", "yen": 505}, {"month": "2024-01", "yen": 523}, {"month": "2024-02", "yen": 527}, {"month": "2024-03", "yen": 523}, {"month": "2024-04", "yen": 527}, {"month": "2024-05", "yen": 527}, {"month": "2024-06", "yen": 527}, {"month": "2024-07", "yen": 523}, {"month": "2024-08", "yen": 523}, {"month": "2024-09", "yen": 527}, {"month": "2024-10", "yen": 527}, {"month": "2024-11", "yen": 527}, {"month": "2024-12", "yen": 527}, {"month": "2025-01", "yen": 527}, {"month": "2025-02", "yen": 524}, {"month": "2025-03", "yen": 539}, {"month": "2025-04", "yen": 543}, {"month": "2025-05", "yen": 550}, {"month": "2025-06", "yen": 554}, {"month": "2025-07", "yen": 582}, {"month": "2025-08", "yen": 602}, {"month": "2025-09", "yen": 603}, {"month": "2025-10", "yen": 614}, {"month": "2025-11", "yen": 614}, {"month": "2025-12", "yen": 603}, {"month": "2026-01", "yen": 614}, {"month": "2026-02", "yen": 598}, {"month": "2026-03", "yen": 613}, {"month": "2026-04", "yen": 613}, {"month": "2026-05", "yen": 623}, {"month": "2026-06", "yen": 619}, {"month": "2026-07", "yen": 614}]}