In the world of boxing, Japan has produced some remarkable talents that have captured the admiration of global fans. Among them is Kosei Tanaka, a former champion across four weight divisions. However, on June 4, Tanaka made a heartfelt announcement via Instagram, revealing his decision to retire from professional boxing due to persistent eye injuries. The revelation comes as a shock to many, especially considering his illustrious career achievements and potential future battles.

Kosei Tanaka's journey in boxing began with rapid success. He became the fastest Japanese fighter ever to claim a world title when he won the WBO mini-flyweight belt in 2014, only five fights into his professional career. Over the years, Tanaka went on to hold titles in three more weight classes: WBO junior-flyweight (2016-2017), WBO flyweight (2018-2020), and most recently, the WBO junior-bantamweight belt in 2024. His ability to dominate multiple weight divisions earned him respect worldwide and cemented his status as one of Japan's greatest boxers.

Tanaka's retirement stems from a series of medical issues affecting his vision. Despite undergoing numerous surgeries since 2021, including neck hernia procedures and multiple eye operations, his eyesight remains compromised. Specifically, his right eye suffers significant distortion, making it impossible for him to focus properly during sparring sessions or competitive matches. This fragility ultimately led to the difficult decision to step away from the sport.

Throughout his career, Tanaka compiled an impressive record of 20 wins, 2 losses, and 11 knockouts. His final bout, held in October 2024 against Phumelela Cafu, ended in defeat but does not diminish the legacy he leaves behind. As fans reflect on his accomplishments, they celebrate not only his skill but also his resilience in overcoming various challenges throughout his career.

The boxing community mourns the loss of such a talented athlete but acknowledges the necessity of Tanaka's choice. His contributions to the sport will be remembered fondly, and his story serves as an inspiration to aspiring fighters everywhere. While the ring may no longer call to him, Kosei Tanaka's impact on boxing history is undeniable and enduring.