A Japanese Kyoyaki studio vase, Koyo Yamazaki (1890-1979), Showa period (1926-1989), circa 1950, the globular stoneware vase covered in a crackled copper green glaze, punctuated randomly with deep raspberry red copper splashes, one section left intentionally unglazed. Impressed two-character 'Koyo' mark to the base. 19.5 cm high, 21 cm diameter, Other Notes: Koyo Yamazaki was a student of famous Kyoto potter Rokubei VI. He exhibited often at the prestigious Nitten and received multiple awards in that and other competitions. His work is held in the Japanese Imperial collection, and in Bern Museum of Art, Switzerland and the Museum of modern Art, Boston.