After World War II, in 1953 he became the coach for the factory women's volleyball team of Nichibo Kaizuka, namely Oriental Witches which started from a factory volleyball team located in Kaizuka City and evolved into the Japanese National Team.　Oriental Witches achieved 175 consecutive wins by Daimatsu's severe training, so he was called "Demon Daimatsu". As the coach of Japanese National Team, he led the Japanese Women's Team to a silver medal in the World Championship in 1960, a gold medal in the World Championship again in 1962 and a gold medal in Tokyo Olympics in 1964.