, also Saroma Lagoon, is a coastal lagoon (hence a body of brackish water) in Saroma, Kitami, and Yà «betsu. It is located in Abashiri Quasi-National Park. By area, the lake is the third largest in Japan and the largest in Hokkaidà Â.
The name comes from the Ainu place name Saruomahetsu, meaning "place of many Miscanthus reeds and rushes".
Another nearby coastal lagoon is Notoro Lagoon, about to the east.