The Zenryoku Usagi are diligent rabbits who specialize in construction and live by the mantra "Zenryoku+Dai-ichi" (meaning "put forth your full effort to be the best"). These endearing animated shorts were originally broadcasted in Japan as a part of the Chibi Ani Gekijō (Tiny Anime Theater) program on either Friday or Saturday mornings, depending on the station. Furthermore, Ikeda and Media Factory have developed two books and several merchandise lines highlighting these delightful characters.