Yasushi Koyama

 小山裕史

1982

Mr Japan - JBBF, Winner

1983

Asian Amateur Championships - IFBB, Light-HeavyWeight, 1st
World Amateur Championships - IFBB, Light-HeavyWeight, 5th

1984

Asian Amateur Championships - IFBB, Light-HeavyWeight, 1st
Mr Japan - JBBF, Winner
World Amateur Championships - IFBB, MiddleWeight, 5th

1985

World Games, MiddleWeight, 8th

1989

Asian Amateur Championships - IFBB, Light-HeavyWeight, 1st