Lakes in Japan
Find lakes in Japan: 188 named lakes in this catalog, sampled 2021–2025. 188 have total phosphorus, 159 have Secchi depth. Values are the authority's own measurements, shown as reported.
Updated 2025
Lake map
Map shows 188 lakes with coordinates · list below has 82
Places in Japan
- FukushimaCounty · 15 lakes
- NaganoCounty · 14 lakes
- AkitaCounty · 13 lakes
- GunmaCounty · 12 lakes
- MiyagiCounty · 11 lakes
- YamaguchiCounty · 11 lakes
- HokkaidoCounty · 10 lakes
- IwateCounty · 10 lakes
- HiroshimaCounty · 9 lakes
- NaraCounty · 7 lakes
- TochigiCounty · 6 lakes
- AomoriCounty · 5 lakes
- EhimeCounty · 5 lakes
- FukuokaCounty · 5 lakes
- KanagawaCounty · 5 lakes
- ChibaCounty · 4 lakes
- YamanashiCounty · 4 lakes
- GifuCounty · 3 lakes
- IshikawaCounty · 3 lakes
- KagoshimaCounty · 3 lakes
- KochiCounty · 3 lakes
- KumamotoCounty · 3 lakes
- SaitamaCounty · 3 lakes
- ToyamaCounty · 3 lakes
- FukuiCounty · 2 lakes
- IbarakiCounty · 2 lakes
- NiigataCounty · 2 lakes
- OitaCounty · 2 lakes
- ShimaneCounty · 2 lakes
- ShizuokaCounty · 2 lakes
- TottoriCounty · 2 lakes
Named lakes
| Lake | Place | Total phosphorus | Chlorophyll-a | Secchi | Year |
|---|---|---|---|---|---|
| ます渕ダム | Fukuoka | 7.0 µg/L | — | 3.5 m | 2025 |
| みどり湖 | Nagano | 26 µg/L | — | — | 2024 |
| 七ケ宿ダム | Miyagi | 8.0 µg/L | — | 3.2 m | 2025 |
| 七北田ダム | Miyagi | 19 µg/L | — | — | 2024 |
| 三川ダム貯水池 | Hiroshima | 35 µg/L | — | 2.3 m | 2025 |
| 三方五湖 | Fukui | 45 µg/L | — | 1.3 m | 2025 |
| 下久保ダム貯水池 | Gunma | 14 µg/L | — | 3.0 m | 2025 |
| 下久保ダム貯水池 | Saitama | 14 µg/L | — | 3.0 m | 2025 |
| 世増ダム貯水池 | Aomori | 33 µg/L | — | 2.4 m | 2025 |
| 世増ダム貯水池 | Iwate | 59 µg/L | — | 1.8 m | 2024 |
| 中禅寺湖 | Tochigi | 5.0 µg/L | — | 7.8 m | 2024 |
| 中綱湖 | Nagano | 9.0 µg/L | — | — | 2024 |
| 丹沢湖 | Kanagawa | 8.0 µg/L | — | 4.0 m | 2025 |
| 亀山ダム貯水池 | Chiba | 38 µg/L | — | 1.3 m | 2025 |
| 二ノ目潟 | Akita | 11 µg/L | — | 5.0 m | 2024 |
| 二瀬ダム貯水池 | Saitama | 11 µg/L | — | 0.8 m | 2025 |
| 伊豆沼 | Miyagi | 98 µg/L | — | — | 2024 |
| 佐久間ダム貯水池 | Shizuoka | 34 µg/L | — | 1.6 m | 2025 |
| 佐幌ダム貯水池 | Hokkaido | 10 µg/L | — | 3.7 m | 2024 |
| 佐鳴湖 | Shizuoka | 140 µg/L | — | 0.4 m | 2025 |
| 倶多楽湖 | Hokkaido | 3.0 µg/L | — | 17 m | 2024 |
| 児島湖 | Okayama | 185 µg/L | — | 0.6 m | 2025 |
| 入畑ダム貯水池 | Iwate | 9.0 µg/L | — | 2.4 m | 2025 |
| 八田原ダム貯水池 | Hiroshima | 25 µg/L | — | 2.3 m | 2025 |
| 八郎湖 | Akita | 84 µg/L | — | 0.6 m | 2025 |
| 力丸ダム | Fukuoka | 17 µg/L | — | 3.0 m | 2025 |
| 北山ダム | Saga | 28 µg/L | — | 2.0 m | 2025 |
| 北川ダム | Oita | 11 µg/L | — | 3.5 m | 2025 |
| 北潟湖 | Ishikawa | 57 µg/L | — | 0.6 m | 2025 |
| 北潟湖 | Fukui | 78 µg/L | — | 0.8 m | 2025 |
| 十和田湖 | Aomori | 4.0 µg/L | — | 10 m | 2024 |
| 十和田湖 | Akita | 4.0 µg/L | — | 11 m | 2024 |
| 千五沢ダム貯水池 | Fukushima | 50 µg/L | — | 1.2 m | 2024 |
| 千苅水源池 | Hyogo | 26 µg/L | — | 2.3 m | 2025 |
| 南川ダム | Miyagi | 15 µg/L | — | — | 2024 |
| 印旛沼 | Chiba | 130 µg/L | — | 0.4 m | 2025 |
| 味噌川ダム貯水池 | Nagano | 7.0 µg/L | — | 8.6 m | 2025 |
| 四十四田ダム貯水池 | Iwate | 26 µg/L | — | 2.1 m | 2025 |
| 土師ダム貯水池 | Hiroshima | 19 µg/L | — | 0.6 m | 2025 |
| 坂本ダム湖 | Nara | 9.0 µg/L | — | — | 2024 |
| 境川ダム貯水池 | Toyama | 3.0 µg/L | — | 5.1 m | 2024 |
| 境川ダム貯水池 | Gifu | 3.0 µg/L | — | 5.1 m | 2024 |
| 夏瀬ダム | Akita | 6.0 µg/L | — | 5.0 m | 2024 |
| 大倉ダム | Miyagi | 8.0 µg/L | — | — | 2024 |
| 大原湖 | Yamaguchi | 8.0 µg/L | — | 4.4 m | 2025 |
| 大川ダム貯水池 | Fukushima | 11 µg/L | — | 2.8 m | 2025 |
| 大座法師池 | Nagano | 16 µg/L | — | — | 2024 |
| 大橋ダム貯水池 | Kochi | 4.0 µg/L | — | — | 2024 |
| 大迫ダム湖 | Nara | 10 µg/L | — | — | 2024 |
| 奈良俣ダム貯水池 | Gunma | 4.0 µg/L | — | 5.5 m | 2024 |
| 奥只見貯水池 | Fukushima | 6.0 µg/L | — | 5.6 m | 2024 |
| 奥只見貯水池 | Niigata | 5.0 µg/L | — | 6.0 m | 2024 |
| 女神湖 | Nagano | 14 µg/L | — | — | 2024 |
| 宍道湖 | Shimane | 45 µg/L | — | 1.5 m | 2025 |
| 室生ダム湖 | Nara | 32 µg/L | — | 2.7 m | 2024 |
| 宮ヶ瀬湖 | Kanagawa | 6.0 µg/L | — | 5.2 m | 2025 |
| 寒河江ダム貯水池 | Yamagata | 10 µg/L | — | 1.5 m | 2024 |
| 寺内ダム | Fukuoka | 31 µg/L | — | 1.6 m | 2025 |
| 小川原湖 | Aomori | 33 µg/L | — | 1.4 m | 2025 |
| 小河内貯水池 | Tokyo | 8.0 µg/L | — | 6.5 m | 2025 |
| 小瀬川ダム貯水池 | Hiroshima | 11 µg/L | — | 2.6 m | 2025 |
| 小野川湖 | Fukushima | 7.0 µg/L | — | 2.7 m | 2024 |
| 小野湖 | Yamaguchi | 22 µg/L | — | 2.5 m | 2025 |
| 尾瀬沼 | Gunma | 6.0 µg/L | — | 3.7 m | 2024 |
| 尾瀬沼 | Fukushima | 10 µg/L | — | 3.5 m | 2024 |
| 屈斜路湖 | Hokkaido | 6.0 µg/L | — | 8.3 m | 2024 |
| 山中湖 | Yamanashi | 10 µg/L | — | 4.4 m | 2025 |
| 山代湖 | Yamaguchi | 14 µg/L | — | 3.6 m | 2025 |
| 岩洞ダム貯水池 | Iwate | 9.0 µg/L | — | 3.4 m | 2024 |
| 岩見ダム | Akita | 14 µg/L | — | 2.4 m | 2024 |
| 川俣ダム貯水池 | Tochigi | 7.0 µg/L | — | 6.1 m | 2025 |
| 川治ダム貯水池 | Tochigi | 8.0 µg/L | — | 4.5 m | 2025 |
| 市房ダム貯水池 | Kumamoto | 15 µg/L | — | 1.1 m | 2025 |
| 布目ダム湖 | Nara | 36 µg/L | — | 2.5 m | 2024 |
| 帝釈川ダム貯水池 | Hiroshima | 20 µg/L | — | 2.3 m | 2025 |
| 常盤湖 | Yamaguchi | 20 µg/L | — | 2.0 m | 2025 |
| 弥栄ダム貯水池 | Hiroshima | 8.0 µg/L | — | 5.8 m | 2025 |
| 弥栄湖 | Yamaguchi | 8.5 µg/L | — | 5.8 m | 2025 |
| 御所ダム貯水池 | Iwate | 10 µg/L | — | 2.5 m | 2025 |
| 徳山ダム貯水池 | Gifu | 4.5 µg/L | — | — | 2024 |
| 油ヶ淵 | Aichi | 250 µg/L | — | — | 2024 |
| 琵琶湖 | Shiga | 10 µg/L | — | 4.1 m | 2025 |
Showing 82 of 188 named lakes. Open a county or place page for the rest.
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Frequently asked questions
- How is lake water quality measured in Japan?
- 188 named lakes in Japan have official phosphorus and Secchi from the Ministry of the Environment (Japan), 2021–2025. These are the authority's own measurements, shown as reported.
- Whose ratings do the Japan lake pages show?
- The publishing authority's own. Pages for lakes in Japan show the values and classes that authority reports, with the season or year each was taken.
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