Dome Co. Ltd , literally "child's dream", is a Japanese racing car constructor involved mainly in open-wheel and sports car racing.

The Dome Zero was a prototype sports car from DOME Co. Ltd that was exhibited at the 48th Geneva Auto Show in 1978. The Dome project, pronounced "do-mu" or "child's dream" in Japanese, was started by Minoru Hayashi in 1975, with the goal of producing sports cars using knowledge gained from auto racing. The Zero was to be their first production road car and Dome planned to produce a limited number for sale in Japan. Despite multiple prototypes and homologation efforts, the Zero was never approved by regulatory bodies for sale in Japan or overseas. As a result, the project was not commercially viable and the Zero never entered series production.