Lake Shinji (宍道湖 Shinji-ko) is a lake in the northeast area of the Shimane Prefecture in Japan. The lake is the seventh largest in Japan, with a circumference of 48 kilometres (30 mi). It is enclosed by the Shimane Peninsula to the north, and the Izumo and Matsue plains to the west and east respectively. 7,652 ha of wetland are a Ramsar Site. Lake Shinji-ko offers an economic benefit to nearby residents in the form of active fisheries and mild tourism opportunities, such as the various hot spring resorts built along the lake's coast and sunset cruises offered by local companies.