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Momotaro claims he has won a ton of races back in middle school and that there's not a single person in his hometown who hasn't heard of him. When meeting Rin, Sosuke, and Aiichiro for the first time, he stated that the swimmers he competed against used to call him The Sea of Japan's Sea Otter. Seijuro Mikoshiba is his older brother.
His hobby is collecting Stag Beetles.
(Source: Free! Wiki)
