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| Series | Hydrogeological Maps of Japan |
| No. | 23 |
| Map Name | Yu-gawa and Agatsuma-gawa Basins, Nagano and Gumma Prefectures |
| Scale | 1:50,000 |
| Author | TAKAHASHI Shigeru, GOTO Hayaji, KANNO Toshio |
| Publish Year | 1974 |
| Publisher | Geological Survey of Japan, AIST |
| Price | ¥1,540 ( Purchase Guide ) |
| Prefecture | |