Graduate of the Agricultural College of Tohoku Imperial University, religious philosopher
Ohsaka was influenced by Kanzo Uchimura when he was at Niigata Junior High School and pledged to live his life as a Christian. He graduated from the Agricultural College of Tohoku Imperial University in 1908. After three years of missionary work in Tokyo, he studied theology in the United States. Ohsaka continued his missionary work in Niigata’s Nagaoka City after returning home, and Dr. Kingo Miyabe invited him to Sapporo in 1939, after which he advocated non-church Christianity.
His literary work includes Clark sensei shoden (A Description of Dr. Clark) and Kiyotaka Kuroda and Horace Capron. He was awarded the Hokkaido Shimbun Press Cultural Prize in 1960.
The Ohsaka collection mainly consists of publications on Christianity, philosophy and literature.