Toraichi Matsuoka

Toraichi Matsuoka was the late father of Rin Matsuoka and Gou Matsuoka. He was a competitive swimmer and his dream was to compete at the the Olympics.

He was forced to give up his dream, afterwards becoming a fisherman and marrying a woman, Miyako Matsuoka, who would give birth to his children. During a storm, Toraichi's fishing boat sunk and he drowned along with his crew, leaving his widow to raise his children. Rin stated that he has very few memories of his father since he was always away at fishing. When he learned about his father's dream, Rin decided to become an Olympic swimmer to fulfill his father's wish.