Alternate Studio Title: Zuiyo Enterprises
This studio was a popular anime studio in the early 1970's. However, Zuiy˘ Eiz˘ found itself in financial trouble because of the high production costs of a series it was attempting to sell to the European market. In 1975, Zuiyo Eizo was split into two entities: Zuiyo (not Zuiy˘ Eiz˘), which all the original company debt and the rights to the Heidi anime, and Nippon Animation, which essentially carried on as a new company with a core of Zuiy˘ Eiz˘'s original production staff.
Zuiy˘ Eiz˘ was based in Tokyo, Japan.