Complex sentence: Haruo Nakajima mainly portrayed Godzilla since 1954 until his retirement in 1972 however, other stunt actors portrayed the character in his absence such as Katsumi Tezuka, Yū Sekida, Ryosaku Takasugi, Seiji Onaka, Shinji Takagi, Isao Zushi, and Toru Kawai.
Split into simpler sentences: Haruo Nakajima mainly portrayed Godzilla since 1954 until his retirement in 1972. However, other stunt actors portrayed the character in his absence, such as Katsumi Tezuka, Yū Sekida, Ryosaku Takasugi, Seiji Onaka, Shinji Takagi, Isao Zushi, and Toru Kawai.