| Lake Miyagase 宮ヶ瀬湖 | |
| Location: | Aiko District, Kanagawa |
| Coords: | 35.5295°N 139.229°W |
| Type: | reservoir |
| Inflow: | Nakatsu River, Hayata River |
| Outflow: | Nakatsu River |
| Pushpin Map: | Japan Kanagawa Prefecture |
| Basin Countries: | Japan |
| Length: | 5.68km (03.53miles) |
| Width: | 1.07km (00.66miles) |
| Area: | 4.6km2 |
| Volume: | 0.193km3 |
| Cities: | Aikawa, Kanagawa |
Lake Miyagase (宮ヶ瀬湖) is a lake within the Aiko District of Kanagawa, Japan, located between Sagamihara and Atsugi.[1] The lake offers views of Tanzawa Mountains, including Mount Hiru. The lake is a man-made reservoir and formed by the Miyagase Dam, and is a source of drinking water for Yokohama and Tokyo.