Named in honor of Yasuo Kato (1949–1982), a famous climber, born in Omiya, Saitama Prefecture. After reaching the summit of Mt. Everest in 1973, he lost from frostbite all of his toes and three finger tips of his right hand. In spite of that, he continued climbing. In 1982 he made the first winter ascent of Everest but was reported missing on the way down. (M 25230; M 25993; M 32127) _ _.