Nakajima also played various other kaiju in Toho's tokusatsu films, including: Rodan (1956), Mothra (1961) and The War of the Gargantuas (1966) and also appeared in a minor role in Akira Kurosawa's Seven Samurai (1954).

[1] At the time, Toho's special effects director, Eiji Tsuburaya considered him completely invaluable,[1] and he was employed to essay the roles of most of the kaiju (Japanese monsters) during his career as a suit actor.

Before shooting began for the first Godzilla movie, in 1954, Nakajima said he spent a week at Tokyo's Ueno Zoo, where he studied the motion of elephants and bears.

[6] After 24 years, Nakajima retired from suit acting upon completion of Godzilla vs. Gigan (1972), when the studio cycled him out of their contract actor system, after it split into several subsidiaries in 1970.

He stayed employed by Toho for several years, and was reportedly transferred to a job at its bowling alley, located on the now defunct studio lot.