The Moominvalley Park is a theme park about the Moomin characters created by Finnish author and artist Tove Jansson. Opened in March 2019 about 40 kilometers northwest of Tokyo in Saitama Prefecture, the theme park is the first one outside of Finland and offers visitors a look into the world of the author and her creation. Among the many series and movies that have been created about the Moomins over the years, a Japanese animation TV series made the hippopotamus-like characters particularly popular in Japan.