1928 RJ. Discovered 1928 Sept. 5 by O. Oikawa at Tokyo. Independently discovered 1928 Sept. 9 by M. F. Wolf at Heidelberg and Sept. 11 by G. N. Neujmin at Simeis.

Named for a well-known composite volcanic mountain about 80 km from the observatory where this planet was discovered. It is a typical mountain resort of Japan with a lake and numerous hot springs. It provides a wonderful view of Mt. Fuji (see planet(1584)) and attracts a lot of tourists all over the year. (K. Tomita)