Onko ware, Akasaka, Gifu Prefecture, Japan. Also known as Akasaka ware, Okachiyama ware, and Mino Banko The largest number of ceramic mask netsuke are Onko ware. These netsuke are unglazed. The preparation of the clay and the way they were fired in the kiln created a unique texture that is very impressive. These masks were produced during the late 19th and early 20th century and are known for their robustness. The prominent signatures (or seals) are Sekisen (father and son) and Sekiho. Others such as Onko, Futaminoura, and Shinryoen are rarer. Some of the works are unmarked
Shimizu Onko (1824~1896) was the creator of Onko ware (also known as Akasaka ware, Okachiyama ware, and Mino Banko). His real name was Heishichi. According to some studies, he learned about pottery under his grandfather (or uncle) Magoroku. He opened a kiln in Akasaka, Mino-Fuwa County, now Gifu Prefecture.
Shimizu Onko II (Sumakichi) 1867-1890
Shimizu Onko III (Goichi) 1862-1923
Shimizu Onko IV (Hidematsu) 1893-1978
Hayashi Kosen (Keiji) 1915-2003
Shimizu Sekisen I (Yusuke) 1848-1927
Shimizu Onko’s younger brother, Sekisen (1848~1927), studied under his brother for more than ten years. Afterward, he studied under the painter Mori Kinseki and other artists in Osaka. He also studied treasures at various shrines and historical sites. He returned to Akasaka (Gifu) and opened the Sekisen pottery. In 1908, he and his son, Sekisen II (1876~1939), opened another kiln in Futaminoura.
Shimizu Sekisen II (Kanaoka) 1876-1939
Shimizu Sekiho (Seinosuke) 1889-1971
Sekiho (1888~1971) was born in Akasaka (Gifu) and entered the Seto Pottery High School. He became an apprentice of the first Sekisen and mainly created teapots. He made mask Netsuke from 1935 to 1943. Living in the same neighborhood, Sekiho was on friendly terms with Ueda Reikichi, the author of Studies in Netsuke.