Reverend Otsuka is the head of a Holocaust Education Center, a center that educates thousands of Japanese children about the Holocaust annually. This museum is located close to Hiroshima, Japan,and has hosted almost 80,000 visitors since it opened in 1995. This is a remarkable feat considering that Japan's Jewish population is only a miniscule percentage of Japan's total population. He is also a Presbyterian priest at Jesus Miyuki Church. Otsuka adheres to Japan Christian Friends of Israel, a Presbyterian sect of Christianity which focuses on building peace between peoples of different religions.