Osamu Usui

 臼井オサム

1978

World Amateur Championships - IFBB, MiddleWeight, 24th

1979

World Amateur Championships - IFBB, MiddleWeight, 26th

1982

Asian Amateur Championships - IFBB, HeavyWeight, 2nd
World Amateur Championships - IFBB, Light-HeavyWeight, Did not place

2000

Japan Nationals - JBBF, HeavyWeight, 3rd