Masamori Tokuyama (徳山 昌守, Tokuyama Masamori?, born Chang-Soo Hong, Korean: 홍창수, Hanja: 洪昌守, on September 17, 1974 in Tokyo, Japan) is a retired professional boxer in the super flyweight (115 lb) division. His professional record was 32-3-1 (8 KOs). He is a former WBC world super flyweight champion.
Because of his affiliation with North Korea and his experience traveling to the country, he had been banned from entering South Korea and the United States. However, he changed his nationality to South Korean in February, 2007. He studied Korean language at Yonsei University in South Korea in March, 2007.
Read more about Masamori Tokuyama: Biography, Tokuyama and North Korea