Takes part in the “International Sky Festival” on the roof of the Takashimaya department store in Osaka. The guest artists sent the Gutai artists photographs of their works, which they reproduced as enlargements and fixed to balloons released into the sky over Osaka.
An exhibition organised by Tapié, “Continuité et avant-garde au Japon" is held at the International Center of Aesthetic Research in Turin.
Shimamoto holds his first solo exhibition at the Gutai Art Gallery, opened that September in Osaka.
Takes part in the "Nul Negentienhonderd vijf en Zegtig" exhibition at the Stedelijk Museum in Amsterdam.
Takes part in the "II Salon International des galeries pilotes” at the Musée cantonal des Beaux Arts in Lausanne, Switzerland.
Takes part in the "IX Exhibition d'art japonais contemporain" at the Tokyo Museum.
The group is asked to put on a number of events at the Osaka Expo: Shimamoto organises various events as artistic production manager.
Two solo exhibitions: at the Galeria Sobrad in São Paulo and at the Muramatsu in Tokyo. The Gutai Group breaks up upon the death of Yoshihara. Shimamoto takes an interest in Mail Art.
Takes part in the activities of the Artists' Union Group, and is elected secretary general, becoming one of the chief representatives of mail art and developing a new and highly personal conception of man as artist and of work as the product of a social and collective enterprise which manifests itself in a specific project. Every time Shimamoto meets an important artist or political figure, he invites him to write, draw, and place objects on his shaved head, capturing the action on camera. Goes on show in Tokyo, Osaka and San Francisco.
Takes part in "Today’s Notion of Space" exhibition at the Yokohama Municipal Gallery of Art and the retrospective "18 years of Gutai art” at the Osaka Prefecture Art Gallery.
Creates a road made up of 10,000 sheets of newspaper on the banks of the River Mukogawa.
Exhibits 10,000 daily papers at the "World Symposium Invitation Show" in Alberta, Canada. Part of the "After Yoshihara and the Gutai" collective at the Kobe Museum of Modern Art.