Hong Chang-su
| Masamori Tokuyama | |
|---|---|
| Statistics | |
| Real name | Chang-soo Hong |
| Weight(s) | Super flyweight |
| Nationality |
 South Korean(Born in  Japan; Represented  North Korea) |
| Born |
September 17, 1974 Tokyo, Japan |
| Stance | Orthodox |
| Boxing record | |
| Total fights | 36 |
| Wins | 32 |
| Wins by KO | 8 |
| Losses | 3 |
| Draws | 1 |
| No contests | 0 |
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 and lineal 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.
Tokuyama was born in Tokyo, Japan as a third generation Zainichi Korean. He made his professional debut in 1994, and challenged the Japanese Flyweight Title twice in 1997, but was unsuccessful both times. He won the vacant OPBF Super Flyweight Title in 1999, and defended it twice. His first world title match was against South Korean fighter In-Joo Cho in 2000, whom he beat by unanimous decision over 12 rounds, becoming the first North Korean to win a boxing world title. He defended his WBC and Lineal Super Flyweight titles eight times before suffering a stunning 1st-round knockout loss to Katsushige Kawashima in 2004. Tokuyama returned after a one-year lay-off to fight Kawashima on July 18, 2005. Tokuyama was knocked down in the last round, but dominated Kawashima for the rest of the fight, regaining his title by a 3-0 decision. He defended his title on February 27, 2006, beating José Navarro by unanimous decision. He relinquished his title after this fight and announced his intention to retire from boxing, but later announced that he would continue his career if he could fight Hozumi Hasegawa for the WBC Bantamweight title. Tokuyama finalized his retirement on March 14, 2007, since Hasegawa declined his challenge for the bantamweight title. Tokuyama cited lack of motivation as the major reason for his retirement.
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