Museum of Modern Art, Kamakura & Hayama, Modern art museum in Hayama and Kamakura, Japan

The Museum of Modern Art, Kamakura & Hayama is a prefectural museum with three halls: the 1951 Kamakura hall designed by Junzo Sakakura, the 1984 Kamakura annex by Masato Otaka, and the 2003 Hayama hall by AXS Satow. The Kamakura hall, a long rectangular building with a flat roof, off-white square panels and a deep loggia behind four dark piers, sits at the edge of a pond. The Hayama hall, once a villa of the Prince Takamatsu family, stands along the seashore and brings natural light into its exhibition rooms.

It opened in 1951 as the first public museum for modern art in Japan and became a pioneer institution for exhibition forms in postwar Japan. Some of the earliest exhibitions introduced new forms of presentation and later influenced many other museums in the region.

The museum's name comes from Kanagawa Prefecture and its two remaining sites: the Kamakura Annex, opened in 1984 and designed by Masato Otaka, and the Hayama hall, opened in 2003 on the former villa grounds of the Takamatsu-no-miya family. The original 1951 Kamakura hall, designed by Junzo Sakakura, closed in 2016 and reopened in 2019 as the Kamakura Bunka-kan Tsurugaoka Museum.

The Kamakura hall closed on 31 March 2016 when the land lease from Tsurugaoka Hachimangu expired; the building reopened in June 2019 as the Kamakura Bunka-kan Tsurugaoka Museum. The Kamakura annex, designed by Masato Otaka, opened in 1984 and mainly shows the permanent collection. The Hayama hall, opened in 2003 on the former Takamatsu villa site, handles special exhibitions.

The museum's collection grew from nothing at its 1951 opening to about 14,000 works by January 2016. In 2014, a print by Munakata Shikō on display was found to be a color copy after a visitor pointed it out; the original is missing. The Kamakura building, designed by Sakakura Junzō, was named a DOCOMOMO Japan 150 building in 1999 and became a prefectural Important Cultural Property in 2016.