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
Station in Kosai. This is the only railway line of Tenryū Hamanako Railroad (天竜浜名湖鉄道, Tenryū Hamanako Tetsudō). The Japanese National Railways Futamata Line