born in Matsuyama City, Ehime Prefecture in 1927, died in Nara in 2005.
Tsubouchi exhibited at the Yomiuri Independent exhibition from 1956 to 1960. In 1956, impressed by Yoshihara Jiro’s “Gutai Art Manifesto” published in the December issue of Geijutsu Shincho, he sent Yoshihara one of his works. He exhibited at the 3rd Gutai Art Exhibition in 1957, and joined the Gutai Art Association the same year. In 1969 and 1970, he held the Ehime Outdoor Art Exhibition. In 1971, he established the Ehime Zokei Sakka Kyokai (Ehime Artists Association). In 1972, he declared all road signs and traffic signs painted on streets stipulating a speed limit of 40 kilometers an hour to be works of art, and based his subsequent art on this theme. In 1975, he organized the Artist’s Union (AU) in Ehime. He died in 2005 at the age of 78.