Katsumi Kitaishimura did compete at master(50+) Mr.Olympia in early 90s. and he retired due to bus accident in LA.
Kozo Sudo and Shigeru Sugita both are great bodybuilders in 1970s when they competed at NABBA .
not talking about Ishimura, Katsumi Kitamura was well known in Japan until he died in 2000 from drugs, go to Golds Gym in Otsuka,Tokyo, his pic is all over the reception area

Sudo and Sugita both won NABBA Universe titles,Sugita won the overall in 76, both briefly competed in the pro IFBB in the early 80's, both better than Hide with less than half the drugs he takes