Kaigyokusai Masatsugu 懐玉齋正次, 1813-1892. Eldest son of Shimizu Kichibei of Sugishitadori, Osaka. In 1829, adopted by Yasunaga Kichirobei. After death of adoptive father, succeeded to the name of Yasunaga. Had no teachers in the study of carving techniques; made sketches from life. Used the names Masatsugu and Kaigyokudo until approximately his 20th year, Kaigyoku until about his 50th year, and Kaigyokusai thereafter. Died in Osaka.