Kim Sung-Jun (

Hangul The Korean alphabet, known as Hangul, . Hangul may also be written as following South Korea's standard Romanization. ( ) in South Korea and Chosŏn'gŭl in North Korea, is the modern official writing system for the Korean language. The ...

: 김성준,

Hanja Hanja (Hangul: ; Hanja: , ), alternatively known as Hancha, are Chinese characters () used in the writing of Korean. Hanja was used as early as the Gojoseon period, the first ever Korean kingdom. (, ) refers to Sino-Korean vocabulary, ...

: 金性俊) (June 3, 1953 – February 3, 1989) was a boxer from

South Korea South Korea, officially the Republic of Korea (ROK), is a country in East Asia, constituting the southern part of the Korea, Korean Peninsula and sharing a Korean Demilitarized Zone, land border with North Korea. Its western border is formed ...

. In January, 1978, he won the Orient and Pacific Boxing Federation light flyweight title. In September, 1978, Kim became the WBC

light flyweight Light flyweight, also known as junior flyweight or super strawweight, is a weight class in boxing. Professional boxing The weight limit at light flyweight in professional boxing is 108 pounds (49 kilograms). When New York legalized boxing in 1920, ...

champion with a KO win over

Netrnoi Sor Vorasingh Netrnoi Sor Vorasingh ( th, เนตรน้อย ส.วรสิงห์; April 22, 1959, in Bua Yai District, Nakhon Ratchasima Province – December 3, 1982 in Phang Khon District, Sakon Nakhon Province) was a Thai world boxing ch ...

. He defended the belt three times before losing it to

Shigeo Nakajima __NOTOC__ is a retired Japanese boxer who is a former WBC junior flyweight champion. He is an alumnus of the Komazawa University. Nakajima began boxing at Yonekura Boxing Gym at the age of a high school student. He compiled an amateur record o ...

in January, 1980. In July, 1980, Kim unsuccessfully challenged Shoji Oguma for the WBC flyweight title, losing by a split decision. After retiring, Kim experienced

dementia pugilistica Chronic traumatic encephalopathy (CTE) is a neurodegenerative disease linked to repeated trauma to the head. The encephalopathy symptoms can include behavioral problems, mood problems, and problems with thinking. The disease often gets worse ov ...

and financial difficulties, and on February 3, 1989, he committed suicide by leaping off a building in

Seoul Seoul (; ; ), officially known as the Seoul Special City, is the Capital city, capital and largest metropolis of South Korea.Before 1972, Seoul was the ''de jure'' capital of the North Korea, Democratic People's Republic of Korea (North Korea ...

External links

* 1953 births 1989 suicides World light-flyweight boxing champions World boxing champions World Boxing Council champions South Korean male boxers Suicides by jumping in South Korea Sportspeople with chronic traumatic encephalopathy Sportspeople from Busan {{Korea-boxing-bio-stub