| Attribute | Okutama × | Nagase × |
|---|---|---|
| Bordering countries | ||
| Surface Area (km²) | 4 | 2 |
| Mean Depth (m) | 44.4 | 28.2 |
| Volume (km³) | 0.18 | 0.05 |
| Shoreline (km) | 45.4 | - |
| Catchment Area (km²) | 259 | 295 |
| Residence Time (yr) | 0.68 | 0.06 |
| Frozen Period | None | None |
| Mixing Type | Monomictic | - |
| Morphogenesis/Dam | Ogochi Dam (1957) | Nagase Dam (1957) |
| Coordinates | ||
| Latitude | 35.791 | 33.704 |
| Longitude | 139.049 | 133.865 |