Zenryoku Usagi are diligent construction workers — who just happen to be rabbits — guided by a straightforward motto: "Zenryoku+Dai-ichi" ("Give everything you've got and be #1.") The animated shorts aired in Japan as part of the Chibi Ani Gekijō (Tiny Anime Theater) program on Friday or Saturday mornings, depending on the station. Ikeda and Media Factory have produced two books and various spinoff merchandise featuring the characters.