US EditionFour-Division World Champion Kosei Tanaka Retires at 29 Due to Eye Injuries
- Kosei Tanaka, a 29-year-old Japanese four-division world boxing champion, announced his retirement on June 4, 2025, in Nagoya.
- Tanaka decided to retire due to repeated eye injuries and surgeries that made it impossible for him to continue competing or sparring.
- He debuted professionally at 18, won the WBO strawweight title in 2015, and became the fastest boxer to hold belts in four weight classes by his 21st fight.
- Tanaka retired with a 20-2 record after losing his last fight in October 2024 to South Africa's Phumelele Cafu and undergoing eye surgeries post-bout.
- His retirement implies he risks permanent blindness if he attempts a comeback, concluding an 11-year professional career with no regrets according to his statement.
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Kosei Tanaka: A Boxer's Fight Beyond the Ring Ends | Sports-Games
Renowned boxer Kosei Tanaka retires at age 29 due to persistent eye injuries. A record holder for fastest four-weight world champion, Tanaka leaves the sport with a 20-2 record. Over his 11-year career, multiple surgeries have left his vision compromised, forcing him to hang up his gloves.
The Independent
The Independent (US)Four-weight world champion Kosei Tanaka confirms retirement at 29 due to eye injuries
Tanaka made a flying start to his professional career, becoming a world champion within five fights before securing another three titles by his 20th bout
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