Strangely enough. The Game Boy Color game Moomin no daibouken was released first in Japan. When it was eventually released in its home region of Europenote Remember that The Moomins were created in Finland as Moomin's Tale, half of the content as well as many cutscenes were absent...
No Export for You: Unfortunately, the US did not get a release of the game or anime at all.
Also, only 52 of 104 episodes got aired in the UK.
Executive Meddling: This is the reason as to why the first series has two animation studios TMS and Mushi).
Write Who You Know: Jansson has herself said that Moominmamma was modelled after her own mother and Too-Ticky after her life partner Tuulikki Pietilš. Also, although never confirmed by Jansson, it seems pretty clear that Tofslan and Vifslan (Thingumy and Bob in the English translation) refer to Tove and her first girlfriend Vivica Bandler. Jansson's boyfriend in the 1940s, Atos Wirtanen, and his old green hat were probably the inspiration behind Snufkin.