Boxers / Kai Watanabe / Boxerbook rating

Kai Watanabe: Boxerbook rating

Kai Watanabe is #29 in the Boxerbook super featherweight list with a rating of 1671 ± 135 from 21 counted bouts, as of Oct 13, 2026.

Rating1671 ± 135
Place#29 in Super featherweight
Counted bouts21
Unknown opponents14 of 21
Schedule, career1251
Schedule, 36 months1367
Form, last 53.0 of 3.5
Data confidence10%
Statusactive · last bout Sep 8, 2026

Rating over time

high 1752 · low 1555Apr 2021Oct 2026

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: 14 of 21 bouts.

W
Rentaro Kimura
Sep 8, 2026 · TKO 2/8 · weight ×1.00 · opponent 1664
+43
→ 1671
W
Hideto Hideo (no page: counted as 1100)
May 12, 2026 · UD 8/8 · weight ×1.00
+9
→ 1628
W
Shido Arai (no page: counted as 1100)
Feb 19, 2026 · TKO 6/8 · weight ×1.00
+9
→ 1619
L
Reo Saito
Lost WBO Asia Pacific title
Jul 31, 2025 · TKO 3/12 · weight ×1.50 · opponent 1500
−76
→ 1610
W
Ryusei Ishii (no page: counted as 1100)
Vacant WBO Asia Pacific super featherweight title
Apr 22, 2025 · TKO 7/12 · weight ×1.50
+12
→ 1686
L
Tsubasa Narai
Jan 24, 2025 · SD 10/10 · weight ×1.05 · opponent 1537
−79
→ 1673
W
Toshihiro Suzuki
Vacant WBO Asia Pacific super featherweight title
Aug 22, 2024 · KO 1/12 · weight ×1.50 · opponent 1698
+86
→ 1752
W
Shunpei Oohata
Japanese youth title, 1st defence
Mar 8, 2024 · MD 8/8 · weight ×1.05 · opponent 1500
+44
→ 1666
W
Shinsei Otani (no page: counted as 1100)
Vacant Japanese youth super featherweight title
Nov 27, 2023 · MD 8/8 · weight ×1.05
+16
→ 1621
W
John John Estrada (no page: counted as 1100)
Jul 8, 2023 · KO 1/8 · weight ×1.00
+17
→ 1606
L
Hiroki Hanabusa
Japanese youth title, 2nd defence, later vacated
Mar 19, 2023 · SD 8/8 · weight ×1.05 · opponent 1560
−130
→ 1589
W
Ryō Nakai
Dec 31, 2022 · TKO 2/8 · weight ×1.00 · opponent 1416
+46
→ 1719
W
Detchadeen Sornsirisparthin (no page: counted as 1100)
Aug 30, 2022 · TKO 4/6 · weight ×1.00
+20
→ 1673
W
Ryota Ishida (no page: counted as 1100)
Apr 26, 2022 · TKO 1/6 · weight ×1.00
+24
→ 1653
D
Chihiro Iwashita (no page: counted as 1100)
Feb 6, 2022 · MD 4/4 · weight ×0.80
−73
→ 1629
W
Ryo Yoshida (no page: counted as 1100)
Dec 19, 2021 · TKO 1/5 · weight ×1.00
+23
→ 1702
W
Seiji Nunozaki (no page: counted as 1100)
Nov 3, 2021 · UD 4/4 · weight ×0.80
+21
→ 1679
W
Yuya Hirose (no page: counted as 1100)
Sep 27, 2021 · UD 4/4 · weight ×0.80
+25
→ 1658
W
Ren Kakimoto (no page: counted as 1100)
Jul 17, 2021 · UD 4/4 · weight ×0.80
+30
→ 1633
W
Soshi Hattori (no page: counted as 1100)
Jun 5, 2021 · TKO 1/4 · weight ×1.00
+49
→ 1604
Show all 21 counted bouts
W
Hikari Sato (no page: counted as 1100)
Apr 21, 2021 · UD 4/4 · weight ×0.80
+55
→ 1555

Publishers and Boxerbook

Consensus: not in the publishers’ top 15 in Super featherweight (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
#29

How the Boxerbook rating works · Kai Watanabe: record and titles