Hara Masatane (原 昌胤, 1531 – June 29, 1575) was a senior retainer of the Takeda clan during the late Sengoku period of Japanese history. Masatane was a relative of Hara Toratane, though from a different branch of the family, and was also a skilled commander. He was present at the Battle of Mimasetoge (1569) and was killed in the forefront of the fighting in the Battle of Nagashino in 1575.