Tetsujin 28-gou (1980)
English name: The New Adventures of Gigantor
Genres: Action
Type: TV, Episodes: 51
Aired: Oct 3, 1980 to Sep 25, 1981
Studio: Tokyo Movie Shinsha
Source: Unknown
Rating: G - All Ages
Synopsis:
Shotaro had become an Interpol agent, working with Branch Robo, the antirobot crime unit of that organization. He still employs Tetsujin.

(Source: AniDB)