Pyun Pyun Maru
Genres: Comedy
Type: TV, Episodes: 26
Aired: Jul 3, 1967 to Mar 30, 1969
Studio: Toei Animation
Source: Unknown
Rating: G - All Ages
Synopsis:
The Ninja Pyun Pyun-Maru and his brother Chibi-Maru are working at an office that accepts anything. They solve unexpected happenings caused by other Ninjas. 

(Source: TOEI Animation Europe catalog)