{"updated": "2026-09-19", "item": "予防接種料", "unit": "1回", "item_code": "6223", "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": 1.006, "from": {"month": "2020-01", "yen": 4206}, "to": {"month": "2026-07", "yen": 4230}, "months": [{"month": "2020-01", "yen": 4206}, {"month": "2020-11", "yen": 4285}, {"month": "2020-12", "yen": 4285}, {"month": "2021-01", "yen": 4280}, {"month": "2021-10", "yen": 4000}, {"month": "2021-11", "yen": 4275}, {"month": "2021-12", "yen": 4285}, {"month": "2022-01", "yen": 4235}, {"month": "2022-10", "yen": 4075}, {"month": "2022-11", "yen": 4335}, {"month": "2022-12", "yen": 4235}, {"month": "2023-01", "yen": 4206}, {"month": "2023-10", "yen": 4120}, {"month": "2023-11", "yen": 4335}, {"month": "2023-12", "yen": 4335}, {"month": "2024-01", "yen": 4190}, {"month": "2024-10", "yen": 4035}, {"month": "2024-11", "yen": 4230}, {"month": "2024-12", "yen": 4230}, {"month": "2025-01", "yen": 4206}, {"month": "2025-10", "yen": 4125}, {"month": "2025-11", "yen": 4230}, {"month": "2025-12", "yen": 4230}, {"month": "2026-01", "yen": 4230}]}