Fuusen no Doratarou
Type: TV, Episodes: 13
Aired: Apr 11, 1981 to Aug 1, 1981
Studio: Nippon Animation
Source: Original
Rating: G - All Ages
Synopsis:
After many years of wandering, Tarou returns to Cat Island to meet his sister, Sakura, who has stayed with their adoptive parents. Though his family is pleased to see him, they all come to realise that the long separation has seen them grow into different people.

(Source: The Anime Encyclopedia)