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Kosei Tanaka professional boxer headshot

Kosei Tanaka








  • Birth Name: 田中恒成
  • Birth Place: Contribute
  • Born: June 15, 1995
  • Died: Contribute
  • Age: 28
  • Height: 5′ 4½″
  • Weight: 115 lb
  • Reach: 64½″
  • Stance: Orthodox
  • Pro Debut: November 10, 2013
  • Nationality: Japan
  • Status: Contribute
  • Manager: Contribute
  • Promoter: Contribute
  • Total Bouts: 19
  • Total Rounds: 27

Kosei Tanaka is a Japanese professional boxer with a record of 18 wins and 1 loss. He started his career in November 2013, defeating Oscar Raknafa via a unanimous decision that lasted six rounds. Tanaka won his first title at the age of 19, after only four professional fights. Tanaka has fought a total of 19 times, with 18 wins, 10 of which are knockouts, and one loss, which ended his 15-fight win streak.

Tanaka has won three world titles at three different weight divisions in his career. He has held the WBO strawweight, light-flyweight, and flyweight world titles. Tanaka is the only Japanese boxer to win legitimate world titles in three weight classes in boxing history.

One of Tanaka's most significant career highlights is when he won his first world championship in his fifth professional fight. Tanaka defeated Julian Yedras via unanimous decision after 12 rounds to become the WBO strawweight champion of the world at the age of 19. This was a remarkable feat, and it set the stage for a promising career ahead.

In his next most notable win, Tanaka successfully defended the WBO light-flyweight title against Ángel Acosta in May 2017. Tanaka won the fight via 12 round unanimous decision, showing his skill and patience to retain his title.

Tanaka successfully defended his WBO flyweight title in his next two fights. He outclassed Ryoichi Taguchi in March 2019, winning via a 12 round unanimous decision. In August of the same year, Tanaka stopped Jonathan González in the seventh round via TKO, further cementing his growing reputation in the flyweight division.

In his most recent big fight, Tanaka defeated Wulan Tuolehazi in December 2019. Tanaka won the fight via third-round knockout in Tokyo and successfully defended his WBO flyweight title again.

Tanaka suffered his first professional loss against Kazuto Ioka in December 2020. The two encountered in a WBO super-flyweight title bout, with Ioka winning via an eighth-round TKO. This defeat ended Tanaka's 15-fight unbeaten streak, which stretched back to his debut.

Tanaka's most recent fight was a non-title bout against Yanga Sigqibo in March 2022. Tanaka won the fight via a 10 round unanimous decision, making it his third victory since losing to Ioka in 2020.

Despite having three world titles, Tanaka has moved up and down different weight classes in his career. He started in the minimumweight division (105 lbs) and won his first world title at the strawweight division (108 lbs). He then moved up to the light-flyweight division (115 lbs) to win his second world title and later the flyweight division (112 lbs) to clinch his third world championship.

Tanaka's boxing style involves quick footwork, hand speed, and excellent head movement. He is excellent at utilizing the ring's whole space, stepping in and out of range at precisely the right moment, and has a knack for landing effective combinations. Tanaka is known to have a lethal left jab, which he uses to set up his fierce right-hand counters. These qualities have made him a challenging fighter to beat and have contributed to his success.

In conclusion, Kosei Tanaka is a successful Japanese boxer with an impressive record of 18 wins and only one loss. He has won world titles in three weight divisions, cementing his place as one of Japan's greatest professional boxers in history. Tanaka's career highlights include defeating Julian Yedras to win his first world championship in his fifth fight, successfully defending his world titles against Ángel Acosta, Ryoichi Taguchi, Jonathan González, and Wulan Tuolehazi, and his only loss coming against Kazuto Ioka in 2020. Tanaka's boxing style involves quick footwork, hand speed and he undoubtedly has a lethal left jab, which is always a threat in the ring.

Kosei Tanaka Fight Record

# Date Age Opponent Result Via
19 Dec 11, 2022 27 Yanga Sigqibo Win UD
18 Jun 29, 2022 27 Masayoshi Hashizume Win TKO5
17 Dec 11, 2021 26 Sho Ishida Win SD
16 Dec 31, 2020 25 Kazuto Ioka Loss TKO8
15 Dec 31, 2019 24 Wulan Tuolehazi Win KO3
14 Aug 24, 2019 24 Jonathan González Win TKO7
13 Mar 16, 2019 23 Ryoichi Taguchi Win UD
12 Sep 24, 2018 23 Sho Kimura Win MD
11 Mar 31, 2018 22 Ronnie Baldonado Win TKO9
10 Sep 13, 2017 22 Palangpol CP Freshmart Win TKO9
9 May 20, 2017 21 Ángel Acosta Win UD
8 Dec 31, 2016 21 Moisés Fuentes Win TKO5
7 May 28, 2016 20 Rene Patilano Win KO6
6 Dec 31, 2015 20 Vic Saludar Win KO6
5 May 30, 2015 19 Julian Yedras Win UD
4 Oct 30, 2014 19 Ryuji Hara Win TKO10
3 Jul 20, 2014 19 Crison Omayao Win KO1
2 Mar 16, 2014 18 Ronelle Ferreras Win UD
1 Nov 10, 2013 18 Oscar Raknafa Win UD