Boxers / Kosei Tanaka / Boxerbook rating

Kosei Tanaka: Boxerbook rating

Kosei Tanaka has a Boxerbook rating of 1958 ± 139 from 23 counted bouts, as of Oct 13, 2026. Not in a division list: inactive since Oct 2024 (no bout for 12 months).

Rating1958 ± 139
PlaceSuper flyweight, not listed
Counted bouts23
Unknown opponents9 of 23
Schedule, career1541
Schedule, 36 months1549
Form, last 51.6 of 3.5
Data confidence57%
Statusinactive since Oct 2024

Rating over time

high 2275 · low 1561Nov 2013Sep 2025

μ at the end of each month with a bout, and of every month while active. Red dot: latest.

Bouts behind the rating

Every counted bout, newest first: the change in μ it caused (green up, red down), its weight and the rating after it. Unknown opponents: 9 of 23 bouts.

L
Phumelele Cafu
WBO world super flyweight title
Oct 16, 2024 · SD 12/12 · weight ×1.65 · opponent 1774
−128
→ 1958
L
Phumelele Cafu
For WBO super-flyweight title
Oct 14, 2024 · SD 12/12 · weight ×1.65 · opponent 1774
−128
→ 1958
W
Christian Bacasegua (no page: counted as 1100)
Won vacant WBO junior-bantamweight title
Feb 24, 2024 · UD 12/12 · weight ×1.65
+2
→ 2214
W
Pablo Carrillo (no page: counted as 1100)
May 21, 2023 · TKO 10/10 · weight ×1.05
+1
→ 2212
W
Yanga Sigqibo (no page: counted as 1100)
Dec 11, 2022 · UD 10/10 · weight ×1.05
+1
→ 2211
W
Masayoshi Hashizume
Won WBO Asia Pacific junior-bantamweight title
Jun 29, 2022 · TKO 5/12 · weight ×1.16 · opponent 1467
+3
→ 2210
W
Shō Ishida
Dec 11, 2021 · SD 10/10 · weight ×1.05 · opponent 1824
+11
→ 2207
L
Kazuto Ioka
For WBO super-flyweight title
Dec 31, 2020 · TKO 8/12 · weight ×1.65 · opponent 2216
−78
→ 2197
W
Wulan Tuolehazi
Retained WBO flyweight title
Dec 31, 2019 · KO 3/12 · weight ×1.65 · opponent 1639
+5
→ 2275
W
Jonathan González
Retained WBO flyweight title
Aug 24, 2019 · TKO 7/12 · weight ×1.65 · opponent 1674
+7
→ 2270
W
Ryōichi Taguchi
For WBO flyweight title
Mar 16, 2019 · UD 12/12 · weight ×1.65 · opponent 1968
+29
→ 2264
W
Sho Kimura
Won WBO flyweight title
Sep 24, 2018 · MD 12/12 · weight ×1.65 · opponent 1892
+26
→ 2234
W
Ronnie Baldonado (no page: counted as 1100)
Mar 31, 2018 · TKO 9/10 · weight ×1.05
+1
→ 2208
W
Rangsan Chayanram
Retained WBO junior-flyweight title
Sep 13, 2017 · TKO 9/12 · weight ×1.65 · opponent 1658
+10
→ 2207
W
Ángel Acosta
Retained WBO junior-flyweight title
May 20, 2017 · UD 12/12 · weight ×1.65 · opponent 2073
+79
→ 2196
W
Moisés Fuentes
Won vacant WBO junior-flyweight title
Dec 31, 2016 · TKO 5/12 · weight ×1.65 · opponent 2036
+136
→ 2118
W
Rene Patilano (no page: counted as 1100)
May 28, 2016 · KO 6/10 · weight ×1.05
+5
→ 1981
W
Vic Saludar
Retained WBO mini-flyweight title
Dec 31, 2015 · KO 6/12 · weight ×1.65 · opponent 1634
+63
→ 1976
W
Julian Yedras (no page: counted as 1100)
Won vacant WBO mini-flyweight title
May 30, 2015 · UD 12/12 · weight ×1.65
+14
→ 1913
W
Ryūji Hara
Won OPBF mini-flyweight title
Oct 30, 2014 · TKO 10/12 · weight ×1.16 · opponent 1925
+241
→ 1899
Show all 23 counted bouts
W
Crison Omayao (no page: counted as 1100)
Jul 20, 2014 · KO 1/10 · weight ×1.05
+33
→ 1659
W
Ronelle Ferreras (no page: counted as 1100)
WBA WORLD LIGHT FLYWEIGHT
Mar 16, 2014 · UD 8/8 · weight ×1.50
+65
→ 1626
W
Oscar Raknafa (no page: counted as 1100)
Nov 10, 2013 · UD 6/6 · weight ×0.90
+61
→ 1561

Publishers and Boxerbook

Consensus: not in the publishers’ top 15 in Super flyweight (a list without them counts as 16).

WBC
not in top 15
WBA
not in top 15
IBF
not in top 15
WBO
not in top 15
Ring
not in top 15
TBRB
not in top 15
Boxerbook
not listed

How the Boxerbook rating works · Kosei Tanaka: record and titles