Masutomi Museum of Geoscience, Geological museum in Kamigyō-ku, Japan

The Masutomi Museum of Geoscience is a geological museum in Kyoto located on the third floor, where mineral specimens and fossil collections are arranged across dedicated exhibition spaces. Visitors encounter displays of rocks, crystals, and preserved remains that tell stories of Earth's natural history.

The institution opened in 1973 as the Nihon Chigaku Kenkyūkaikan, a Japan earth science research hall. On 26 July 1991 it became a foundation supervised by the Kyoto Prefectural Board of Education and took the name Masutomi Museum of Geoscience. On 1 August 2012 it was reorganized as a public interest foundation under the Cabinet Office. Its chairmen have included Masutomi Jusaburō and Masutomi Sumi.

The museum is named after Masutomi Jusaburō, the first chairman, whose personal rock collection formed its core; his successors Masutomi Sumi, Yoshihara Hidetoshi and Yamaoka Keiichirō followed as chairmen. Its nickname, Ishi Fushigi Hakubutsukan ("Museum of Stone Wonders"), signals its focus on stones, and the foundation also organises travelling exhibitions.

The museum is accessible via Exit 2 of Marutamachi Station on the Karasuma Line subway, followed by a seven-minute walk through the neighborhood. The location sits in a residential area where finding the building is straightforward once you exit the station.

The museum is run by the Masutomi Geoscience Foundation, whose past chairmen include Jusaburo Masutomi and Sumi Masutomi, followed by Hidetoshi Yoshihara and Keiichiro Yamaoka. Current chairman Kenji Tsuruta and executive director Goichi Sano lead a small staff of researchers and specialists. The foundation also organizes temporary exhibitions alongside its permanent rock museum.