The Tenryū Hamanako Line (天竜浜名湖線 Tenryū Hamanako-sen) or Tenhama Line (天浜線 Tenhama-sen) for short is a Japanese railway line in Shizuoka Prefecture running the north coast of Lake Hamana between Kakegawa Station in Kakegawa and Shinjohara Station in Kosai. This is the only railway line of Tenryū Hamanako Railroad (天竜浜名湖鉄道 Tenryū Hamanako Tetsudō).
