DATA
Published caffeine values for hojicha, with test conditions
Published caffeine values for hojicha and other teas, each with the conditions under which it was measured. Japan's composition tables give hojicha 20 mg per 100 mL, the same as sencha.
Key findings
- Japan's composition tables give hojicha 20 mg per 100 mL of infusion, the same as sencha.
- Bancha and genmaicha are 10 mg, but the table rounds to 0.01 g, so this cannot be read as half.
- A bowl of matcha is 48 mg; a 150 mL cup of hojicha is about 30 mg [calculated].
- In a Kochi Prefecture trial, dark roasting reduced caffeine by about 6–13% and light roasting left it almost unchanged.
- In sencha measurements, an hour in 10°C water releases about half as much as 2 minutes at 80°C (an index of about 50, with 80°C for 2 minutes as 100).
- No acceptable daily intake (ADI) has been set, in Japan or internationally.
Table
| Item | Value | Unit | Test conditions | Source |
|---|---|---|---|---|
| Hojicha (infusion) | 20 | mg per 100 mL of infusion | 15 g leaf, 650 mL water at 90°C, 0.5 min | Standard Tables of Food Composition in Japan (8th rev.), 2023 supplement |
| Bancha (infusion) | 10 | mg per 100 mL of infusion | 15 g leaf, 650 mL water at 90°C, 0.5 min | Standard Tables of Food Composition in Japan (8th rev.), 2023 supplement |
| Genmaicha (infusion) | 10 | mg per 100 mL of infusion | 15 g leaf, 650 mL water at 90°C, 0.5 min | Standard Tables of Food Composition in Japan (8th rev.), 2023 supplement |
| Oolong tea (infusion) | 20 | mg per 100 mL of infusion | 15 g leaf, 650 mL water at 90°C, 0.5 min | Standard Tables of Food Composition in Japan (8th rev.), 2023 supplement |
| Sencha (infusion) | 20 | mg per 100 mL of infusion | 10 g leaf, 430 mL water at 90°C, 1 min | Standard Tables of Food Composition in Japan (8th rev.), 2023 supplement |
| Kamairicha (infusion) | 10 | mg per 100 mL of infusion | 10 g leaf, 430 mL water at 90°C, 1 min | Standard Tables of Food Composition in Japan (8th rev.), 2023 supplement |
| Gyokuro (infusion) | 160 | mg per 100 mL of infusion | 10 g leaf, 60 mL water at 60°C, 2.5 min | Standard Tables of Food Composition in Japan (8th rev.), 2023 supplement |
| Black tea (infusion) | 30 | mg per 100 mL of infusion | 5 g leaf, 360 mL boiling water, 1.5–4 min (six samples in one row) | Standard Tables of Food Composition in Japan (8th rev.), 2023 supplement |
| Hojicha (leaf) | 1.5 | g per 100 g of leaf | the leaf itself | Standard Tables of Food Composition in Japan (8th rev.), 2023 supplement |
| Bancha (leaf) | 1.9 | g per 100 g of leaf | the leaf itself | Standard Tables of Food Composition in Japan (8th rev.), 2023 supplement |
| Sencha (leaf) | 2.3 | g per 100 g of leaf | the leaf itself | Standard Tables of Food Composition in Japan (8th rev.), 2023 supplement |
| Black tea (leaf) | 2.9 | g per 100 g of leaf | the leaf itself | Standard Tables of Food Composition in Japan (8th rev.), 2023 supplement |
| Matcha (powder) | 3.2 | g per 100 g of leaf | the powder itself | Standard Tables of Food Composition in Japan (8th rev.), 2023 supplement |
| Gyokuro (leaf) | 3.5 | g per 100 g of leaf | the leaf itself | Standard Tables of Food Composition in Japan (8th rev.), 2023 supplement |
| Matcha, one bowl | 48 | mg per bowl | 1.5 g powder in 70 mL of water | Standard Tables of Food Composition in Japan 2020 (8th rev.) |
| Hojicha, one cup | about 30 [calculated] | mg per 150 mL | calculated from 20 mg per 100 mL | Association's calculation from the composition tables |
| Maruhachi Seichajo bōcha | 16 | mg (as stated on the shop's page) | measured in 2016 by the Industrial Research Institute of Ishikawa; conditions unverified | Maruhachi Seichajo, "Hojicha and caffeine" |
| Roasting: first flush, light / dark | 101／94 | index (crude tea = 100) | 1.9 g leaf, 200 mL boiling water, 5 min (2014 data) | Kochi Prefectural Agricultural Research Center, Tea Experiment Station |
| Roasting: trimmed bancha, light / dark | 99／87 | index (crude tea = 100) | 1.9 g leaf, 200 mL boiling water, 5 min (2014 data) | Kochi Prefectural Agricultural Research Center, Tea Experiment Station |
| Stem tea before roasting | 77 | % (first flush = 100) | 1 g ground leaf, extracted at 80°C for 30 min, made up to 100 mL (2014); whether stems only is not stated | Kochi Prefectural Agricultural Research Center, Tea Experiment Station |
| Sencha cold brew: 10°C, 1 hour | about 50 | index (80°C for 2 min = 100) | sencha, not hojicha | Monobe M. (2018) JARQ 52(1) |
| Sencha cold brew: 0.5°C (iced water), 1 hour | under 20 | index (80°C for 2 min = 100) | sencha, not hojicha | Monobe M. (2018) JARQ 52(1) |
| Crude tea in water: 20°C, 20 minutes | over 70 | % of the amount in the leaf | 1 g first-flush crude tea stirred in 500 mL at 20°C | Horie H. et al. (2001) Tea Research Journal 91 |
How it was counted
- We collected the published and trial values cited in our articles, together with their test conditions.
- None of these values were measured by the association.
- Values measured under different conditions cannot be compared directly.
- In the composition tables, two groups share conditions: bancha, hojicha, genmaicha and oolong; and sencha and kamairicha.
- The tables round to 0.01 g, so 10 mg and 20 mg cannot be read as "double".
- [calculated] marks values the association calculated from published figures.
- The test conditions behind Maruhachi Seichajo's 16 mg are unverified.
- Sources were checked on the articles' verification date, 22 September 2026.
Sources
- 文部科学省「日本食品標準成分表（八訂）増補2023年 第2章データ（16 し好飲料類）」 ↗（checked 2026-09-22）
- 文部科学省「日本食品標準成分表（八訂）増補2023年 電子書籍PDF 第3章」 ↗（checked 2026-09-22）
- 文部科学省「日本食品標準成分表（八訂）増補2023年 公表ページ」 ↗（checked 2026-09-22）
- 農林水産省「カフェインの過剰摂取について」（値の出典＝日本食品標準成分表2020年版（八訂）） ↗（checked 2026-09-22）
- 丸八製茶場「焙じ茶とカフェイン」 ↗（checked 2026-09-22）
- 高知県農業技術センター茶業試験場「焙煎程度とほうじ茶の品質」 ↗（checked 2026-09-22）
- 物部真奈美（2018）JARQ 52(1):1-6（国際農林水産業研究センター刊） ↗（checked 2026-09-22）
- 堀江秀樹・氏原ともみ・木幡勝則（2001）茶主要成分の茶浸出液への溶出特性. 茶業研究報告 91:29-33 ↗（checked 2026-09-22）
- 内閣府食品安全委員会 ファクトシート「食品中のカフェイン」 ↗（checked 2026-09-22）
- 厚生労働省「食品に含まれるカフェインの過剰摂取についてQ&A」 ↗（checked 2026-09-22）
Related articles
How to cite this data
To cite it, you can use the line below as it is. Please include the page's URL.
Japan Hojicha Association, "Published caffeine values for hojicha, with test conditions" (surveyed September 2026). https://japan-hojicha.org/en/data/caffeine-public-values