Wanpaku Tanteidan
Genres: Action, Mystery
Type: TV, Episodes: 35
Aired: Feb 1, 1968 to Sep 26, 1968
Studio: Mushi Production
Source: Unknown
Rating: PG-13 - Teens 13 or older
Synopsis:
A group of young boys (plus a token girl and her little brother, the obligatory brat) form a detective club, pooling their talents for brain, brawn, invention, and driving skills to solve crimes in Tokyo. Much to the consternation of police chief Nakamura, they often succeed where the professionals fail.

(Source: The Anime Encyclopedia)