Lake Hamana

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Lake Hamana
A view from Hamanako Service Area
Lake Hamana
Landsat image
Location	Shizuoka Prefecture
Coordinates	34°44′28″N 137°34′11″E / 34.74111°N 137.56972°E / 34.74111; 137.56972
Type	Brackish lagoon
Primary outflows	Pacific Ocean
Basin countries	Japan
Surface area	65.0 km2 (25.1 sq mi)
Average depth	4.8 m (16 ft)
Max. depth	16.6 m (54 ft)
Water volume	0.35 km3 (280,000 acre⋅ft)
Shore length1	114 km (71 mi)
Surface elevation	0 m (0 ft)
1 Shore length is not a well-defined measure.

Lake Hamana (浜名湖, Hamana-ko) is a brackish lagoon in Shizuoka Prefecture, Japan. Formerly a true lake, it is now connected to the Pacific Ocean by a channel. As an internal body of water, it is considered Japan's tenth-largest lake (by area). It spans the boundaries of the cities of Hamamatsu and Kosai.