Zuiyô Eizô

This studio was a popular anime studio in the early 1970's. However, Zuiyô Eizô 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 Zuiyô Eizô), 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 Zuiyô Eizô's original production staff.