フィニアスとファーブ is the Japanese dub of Phineas and Ferb.
It is one of the most viewed American animated shows in Japan, and its fanbase seems to be active. Japanese fanarts and fanfics are very extensive and the show has several followers from this country.
Disney Channel Japan
Merchandising in Japan is common and the most abundant products include backpacks, slippers, T-shirts and plush dolls. Pens, dolls and posters are also sold. Video games are common and can be purchased in English and Japanese.