虫プロダクション
Shaft was founded on September 1, 1975, by ex-Mushi Production employee Hiroshi Wakao. Much of the company's early work was sub-contracting work for larger animation studios, which includes credits to cel painting and color coordination work, such as with "Brave Raideen" (1975–76), and occasionally credits as an assistant production studio for projects including Pierrot's "" (1984).