Toraichi Matsuoka

Toraichi Matsuoka is late father to Gou and Rin Matsuoka who was a swimmer whose dream was to go the Olympics but he forced given up his dream to become fisherman and married a woman who would give birth to his children. During a storm, Toraichi's fishing boat sunk and he drowned to death along with his crew leaving his widow to raised his children. Rin stated that he has very few memories of his father since he was always gone fishing and when he learned his father's dream Rin decided to become a Olympic swimmer fulfilling his father's wish