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.
He was known as one of the 'Twenty-Four Generals of Takeda Shingen'.