| Attribute | Shumarinai × | Okutama × |
|---|---|---|
| Bordering countries | ||
| Surface Area (km²) | 24 | 4 |
| Mean Depth (m) | 10 | 44.4 |
| Volume (km³) | 0.24 | 0.18 |
| Shoreline (km) | 83.5 | 45.4 |
| Catchment Area (km²) | 312.1 | 259 |
| Residence Time (yr) | 68 | 0.68 |
| Frozen Period | Nov-May | None |
| Mixing Type | - | Monomictic |
| Morphogenesis/Dam | Uryu Dai-ichi Dam (1943) | Ogochi Dam (1957) |
| Coordinates | ||
| Latitude | 44.302 | 35.791 |
| Longitude | 142.185 | 139.049 |