Boxers / Koichi Aso / Boxerbook rating
Koichi Aso: Boxerbook rating Koichi Aso has a Boxerbook rating of 1423 ± 145 from 37 counted bouts, as of Oct 13, 2026. Not in a division list: inactive since Mar 2023 (no bout for 12 months).
Rating 1423 ± 145
Place not listed
Counted bouts 37
Unknown opponents 28 of 37
Schedule, career 1217
Schedule, 36 months no bouts
Form, last 5 1.3 of 3.5
Data confidence 19%
Status inactive since Mar 2023
Rating over time high 1646 · low 1386 Jun 2006 Feb 2024 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: 28 of 37 bouts.
L
Toshito Ohno (no page: counted as 1100)
Mar 20, 2023 · SD 8/8 · weight ×1.00
L
OPBF super lightweight title Jun 14, 2022 · TKO 2/12 · weight ×1.05 · opponent 1556
W
Dec 14, 2021 · TKO 9/12 · weight ×1.05 · opponent 1873
W
Shogo Yamaguchi (no page: counted as 1100)
Sep 27, 2020 · MD 8/8 · weight ×1.00
L
Tatsuya Yanagi (no page: counted as 1100)
May 18, 2019 · UD 8/8 · weight ×1.00
W
Kuniaaki Sato (no page: counted as 1100)
Nov 9, 2018 · TD 6/8 · weight ×0.90
L
Japanese super lightweight title Dec 14, 2017 · UD 10/10 · weight ×1.10 · opponent 1463
W
Japanese title, 1st defence Jun 8, 2017 · TKO 10/10 · weight ×1.05 · opponent 1500
W
Vacant Japanese super lightweight title Feb 9, 2017 · TKO 8/10 · weight ×1.05 · opponent 1259
L
Japanese title, 4th defence Apr 19, 2016 · TKO 7/10 · weight ×1.05 · opponent 1815
W
Tatsuya Miyazaki (no page: counted as 1100)
Sep 3, 2015 · TKO 8/8 · weight ×1.00
W
Gabriel Royo (no page: counted as 1100)
Apr 1, 2015 · TKO 7 · weight ×1.00
L
Japanese title, 1st defence Jul 28, 2014 · UD 10/10 · weight ×1.10 · opponent 1754
W
Takashi Inagaki (no page: counted as 1100)
Apr 10, 2014 · KO 1 · weight ×1.00
W
Satoshi Momota (no page: counted as 1100)
Nov 26, 2013 · TKO 6 · weight ×1.00
W
Moon-hyun Yun (no page: counted as 1100)
Jul 24, 2013 · TD 8 · weight ×1.00
L
Jung-hoon Ryang (no page: counted as 1100)
Feb 27, 2013 · UD 8/8 · weight ×1.00
W
Tomohiko Sakai (no page: counted as 1100)
Nov 3, 2012 · UD 8/8 · weight ×1.00
W
Juan Castillo Iha (no page: counted as 1100)
Jul 10, 2012 · UD 6/6 · weight ×0.90
L
Tsuyoshi Ozawa (no page: counted as 1100)
Feb 28, 2012 · UD 8/8 · weight ×1.00
Show all 37 counted bouts L
Oct 15, 2011 · TKO 1/8 · weight ×1.00 · opponent 1529
W
Yoshitaka Katanami (no page: counted as 1100)
Jul 6, 2011 · UD 6/6 · weight ×0.90
W
Kazuyoshi Kumano (no page: counted as 1100)
Apr 27, 2011 · TKO 7/8 · weight ×1.00
W
Yusuke Kikuchi (no page: counted as 1100)
Nov 2, 2010 · TKO 8/8 · weight ×1.00
L
Taisho Ozawa (no page: counted as 1100)
May 15, 2010 · TKO 2/8 · weight ×1.00
W
Hiromi Morishita (no page: counted as 1100)
Feb 19, 2010 · TKO 4/8 · weight ×1.00
W
Kento Nakamura (no page: counted as 1100)
Jun 14, 2009 · TD 4/6 · weight ×1.00
W
Hiroshi Abe (no page: counted as 1100)
Feb 7, 2009 · TKO 4/6 · weight ×1.00
D
Nov 2, 2008 · SD 5/5 · weight ×0.90 · opponent 1481
W
Ho-chul Lee (no page: counted as 1100)
Sep 26, 2008 · UD 4/4 · weight ×0.80
W
Tomoyuki Tsushima (no page: counted as 1100)
Aug 5, 2008 · TKO 3/4 · weight ×1.00
W
Masamoto Kotake (no page: counted as 1100)
May 27, 2008 · MD 4/4 · weight ×0.80
W
Takahiro Abe (no page: counted as 1100)
Dec 19, 2007 · SD 4/4 · weight ×0.80
L
Akinori Kuramata (no page: counted as 1100)
Aug 17, 2007 · TKO 2/4 · weight ×1.00
W
Yuki Amauchi (no page: counted as 1100)
Jun 13, 2007 · TKO 3/4 · weight ×1.00
W
Nobuya Kasai (no page: counted as 1100)
Sep 4, 2006 · TKO 3/4 · weight ×1.00
W
Yoshitaka Yamaguchi (no page: counted as 1100)
Jun 28, 2006 · TKO 4 · weight ×1.00
Publishers and Boxerbook Consensus: no publisher lists for the division (a list without them counts as 16).
How the Boxerbook rating works · Koichi Aso: record and titles