In later years, Hirose confessed that he never went to the zoo and then lied to Tsuburaya, saying that he had gained a lot of experience during the alleged visit.

[6] Despite his enthusiasm for working with the special effects team, he had difficulty playing King Kong, because the zipper sewn into the costume (in order to hide it) forced him to stay in it for a long time: “Sweat was pouring out of me and even getting into my eyes.

[8] Equally, the film's special effects directors Koichi Kawakita and Teruyoshi Nakano, then assistants to the special effects operator, believed that King Ghidorah in Ghidorah, the Three-Headed Monster was played by Kōji Uruki, who also played Rodan.

[7] In 1971, during the financial crisis that hit Japan, all actors contracted with Toho were restructured, and Hirose remained in the studio as a stage worker, where he worked until the 1990s.

[1] He died shortly after living in a nursing home for several years, but the exact date of his death is unknown.