Yamakawa Futaba (1844-1909) was an educator in the Japanese region of Aizu. While little is recorded of her life, it is known that she was trained as a fighter and took part in the defense of Tsuruga Castle when it was besieged during the Boshin War. While the castle’s defenses were eventually breached, Futaba survived the siege and following the war went on to lead the movement demanding improved education for women and girls in Japan.