Makio (voice) (1 episode)

Uno (voice) (26 episodes)

Mr. Ishihara (voice) (1 episode)

Hiroyuki's Stepfather (voice) (1 episode)

Anderson

Zhang Song (voice)

(voice) (36 episodes)

Hans (voice)

Boss (voice)

堂下来内 (28 episodes)

Matthewson (voice)

Lawrence

Professor (voice)

God of Poseidon (voice)

メルチュウル (24 episodes)

Prof. Daiba (voice) (42 episodes)

(voice) (44 episodes)

Principal (voice) (1 episode)

Yano Father (voice) (1 episode)

由美子の父 (39 episodes)

Dr. Nossori (92 episodes)

Poseidon (27 episodes)

(voice) (25 episodes)

Cat Sailor B (voice)

Zaimoku (26 episodes)

Sea King (voice)

Kumagorou (90 episodes)

Minister of Science (voice) (2 episodes)

Konaki Jijii (voice) (1 episode)