{"updated": "2026-09-19", "slug": "foil", "name": "アルミホイル", "name_en": "Aluminum foil", "query": "アルミホイル", "unit": "m", "per": 1, "unit_label": "1m", "date": "2026-09-19", "n": 1, "median_per_unit": 73.83, "method": "楽天市場の検索（レビュー数順の上位90件）から、商品名に書かれた数量を規則か LLM が読み取り（根拠の文字列が商品名に実在するものだけ）、価格 ÷ 数量。推定なし。読めない商品は載せない", "source": "楽天ウェブサービス（商品検索 API）。価格は取得時点", "license": "CC BY 4.0（数値）。商品名と画像は楽天市場の各店舗に帰属", "cost_page": null, "lowest_in_days": null, "saving": null, "items": [{"rank": 1, "name": "クックパー フライパン用ホイル(25cm*12m)【クックパー】", "price": 886, "qty": 12.0, "unit": "m", "per_unit_price": 73.83, "per_unit_label": "1m", "evidence": "12m", "read_by": "rule", "reviews": 76, "stars": 4.79, "shop": "楽天24", "url": "https://item.rakuten.co.jp/rakuten24/e435035h/", "image": "https://thumbnail.image.rakuten.co.jp/@0_mall/rakuten24/cabinet/913/4901670110913.jpg?_ex=128x128", "aff": "https://hb.afl.rakuten.co.jp/hgc/217233e2.35580694.217233e3.c557230b/?pc=https%3A%2F%2Fitem.rakuten.co.jp%2Frakuten24%2Fe435035h%2F"}], "history": [{"date": "2026-08-24", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}, {"date": "2026-08-25", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}, {"date": "2026-08-26", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}, {"date": "2026-08-27", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}, {"date": "2026-08-28", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}, {"date": "2026-08-29", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}, {"date": "2026-08-30", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}, {"date": "2026-08-31", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}, {"date": "2026-09-01", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}, {"date": "2026-09-02", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}, {"date": "2026-09-03", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}, {"date": "2026-09-04", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}, {"date": "2026-09-05", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}, {"date": "2026-09-06", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}, {"date": "2026-09-07", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}, {"date": "2026-09-08", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}, {"date": "2026-09-09", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}, {"date": "2026-09-10", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}, {"date": "2026-09-11", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}, {"date": "2026-09-12", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}, {"date": "2026-09-13", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}, {"date": "2026-09-14", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}, {"date": "2026-09-15", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}, {"date": "2026-09-16", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}, {"date": "2026-09-17", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}, {"date": "2026-09-18", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}, {"date": "2026-09-19", "fetched": 12, "readable": 1, "median_per_unit": 73.83, "low_by_unit": {"m": 73.833}}], "yahoo": {"date": "2026-09-19", "n": 9, "median_per_unit": 74.0, "source": "Yahoo!ショッピング 商品検索 API v3（レビュー数順の上位90件）", "items": [{"rank": 1, "name": "フライパン用ホイル 魚焼きホイル 25cm×12m 2個", "price": 840, "qty": 24.0, "unit": "m", "per_unit_price": 35.0, "evidence": "12m 2個", "reviews": 158, "stars": 4.71, "shop": "LOHACO by アスクル", "url": "https://lohaco.yahoo.co.jp/store/h-lohaco/item/p645187/", "image": "https://item-shopping.c.yimg.jp/i/g/rd-lohaco_p645187"}, {"rank": 2, "name": "フライパン用ホイル 魚焼きシリコンホイル 25cm×12m 1個", "price": 430, "qty": 12.0, "unit": "m", "per_unit_price": 35.833, "evidence": "12m 1個", "reviews": 83, "stars": 4.63, "shop": "LOHACO by アスクル", "url": "https://lohaco.yahoo.co.jp/store/h-lohaco/item/5369854/", "image": "https://item-shopping.c.yimg.jp/i/g/rd-lohaco_5369854"}, {"rank": 3, "name": "フライパン用ホイル 魚焼きホイル 25cm×6m 1本", "price": 250, "qty": 6.0, "unit": "m", "per_unit_price": 41.667, "evidence": "6m 1本", "reviews": 136, "stars": 4.51, "shop": "LOHACO by アスクル", "url": "https://lohaco.yahoo.co.jp/store/h-lohaco/item/8824236/", "image": "https://item-shopping.c.yimg.jp/i/g/rd-lohaco_8824236"}, {"rank": 4, "name": "クックパー フライパン用ホイル 25cm×12m 1本 旭化成ホームプロダクツ", "price": 798, "qty": 12.0, "unit": "m", "per_unit_price": 66.5, "evidence": "12m 1本", "reviews": 97, "stars": 4.75, "shop": "LOHACO by アスクル", "url": "https://lohaco.yahoo.co.jp/store/h-lohaco/item/j977288/", "image": "https://item-shopping.c.yimg.jp/i/g/rd-lohaco_j977288"}, {"rank": 5, "name": "クックパー フライパン用ホイル 25cm×7m 1本 旭化成ホームプロダクツ", "price": 518, "qty": 7.0, "unit": "m", "per_unit_price": 74.0, "evidence": "7m 1本", "reviews": 85, "stars": 4.48, "shop": "LOHACO by アスクル", "url": "https://lohaco.yahoo.co.jp/store/h-lohaco/item/8075868/", "image": "https://item-shopping.c.yimg.jp/i/g/rd-lohaco_8075868"}, {"rank": 6, "name": "クックパー フライパン用ホイル 25cm×3m 1本 旭化成ホームプロダクツ", "price": 298, "qty": 3.0, "unit": "m", "per_unit_price": 99.333, "evidence": "3m 1本", "reviews": 61, "stars": 4.38, "shop": "LOHACO by アスクル", "url": "https://lohaco.yahoo.co.jp/store/h-lohaco/item/8308351/", "image": "https://item-shopping.c.yimg.jp/i/g/rd-lohaco_8308351"}, {"rank": 7, "name": "フライパン用ホイル 魚焼きホイル 25cm×6m 1セット（3本：1本×3）", "price": 720, "qty": 6.0, "unit": "m", "per_unit_price": 120.0, "evidence": "6m 1セット", "reviews": 90, "stars": 4.67, "shop": "LOHACO by アスクル", "url": "https://lohaco.yahoo.co.jp/store/h-lohaco/item/8889876/", "image": "https://item-shopping.c.yimg.jp/i/g/rd-lohaco_8889876"}, {"rank": 8, "name": "クックパー フライパン用ホイル 25cm×7m 1セット（2本） 旭化成ホームプロダクツ", "price": 998, "qty": 7.0, "unit": "m", "per_unit_price": 142.571, "evidence": "7m 1セット", "reviews": 86, "stars": 4.67, "shop": "LOHACO by アスクル", "url": "https://lohaco.yahoo.co.jp/store/h-lohaco/item/8413830/", "image": "https://item-shopping.c.yimg.jp/i/g/rd-lohaco_8413830"}, {"rank": 9, "name": "クックパー フライパン用ホイル 25cm×3m 1セット（3本）旭化成ホームプロダクツ", "price": 858, "qty": 3.0, "unit": "m", "per_unit_price": 286.0, "evidence": "3m 1セット", "reviews": 139, "stars": 4.63, "shop": "LOHACO by アスクル", "url": "https://lohaco.yahoo.co.jp/store/h-lohaco/item/8853416/", "image": "https://item-shopping.c.yimg.jp/i/g/rd-lohaco_8853416"}]}, "answer": "2026-09-19、アルミホイルがいちばん安いのは1mあたり74円（楽天市場・クックパー フライパン用ホイル(25cm*12m)【クックパ・886円で12m）。ふつうは1mあたり74円です。"}