Lake Notoro

, also Lake Notori or Notoro Lagoon, is a coastal lagoon by the northern shore of Abashiri, Hokkaidō, Japan. It is included in Abashiri Quasi-National Park.
It is the 13th-largest lake in Japan.
It is about 2 km northwest of Lake Abashiri and 15 km east of Lake Saroma (also a coastal lagoon).