fullname club birth_place weight height birth_date article_title strokes
yasuhiro koseki miki house tsuruoka , yamagata , japan 82 kg lb on 1.88 m ftin on 14 march 1992 yasuhiro koseki
 breaststroke
yasuhiro koseki

since 2010 koseki studied at the nippon sport science university , where he first specialized in the freestyle , and only later changed to breaststroke , motivated by kosuke kitajima .
