Izunuma and Uchinuma (伊豆沼・内沼) are a pair of interconnected freshwater lakes in the alluvial plain of the Hasama River, a tributary of the Kitakami River in Miyagi Prefecture, Japan.[1] In 1967 the birdlife and habitat of the lakes were designated a Natural Monument.[2] In 1985 an area of 559 hectares was designated a Ramsar Site.[3] In 1996 the sound of the Izunuma-Uchinuma Greater White-fronted Goose was selected as one of the 100 Soundscapes of Japan by the Ministry of the Environment.[4]