Olympic Medalists: 1 bronze, 1 bronze/gold, 1 silver
(silver) Nobuo Arai   1928   swimming - 4x200 m freestyle relay  
(bronze/gold) Shigeo Arai   1936   swimming - 100 m freestyle; swimming - 4x200 m freestyle relay  
(bronze) Hirooki Arai   2016   50 km walk