Boxers / Yoshio Shirai / Boxerbook rating
Yoshio Shirai: Boxerbook rating Yoshio Shirai has a Boxerbook rating of 1752 ± 319 from 61 counted bouts, as of Oct 13, 2026. Not in a division list: inactive since May 1955 (no bout for 12 months).
Rating 1752 ± 319
Place not listed
Counted bouts 61
Unknown opponents 44 of 61
Schedule, career 1249
Schedule, 36 months no bouts
Form, last 5 1.4 of 3.5
Data confidence 13%
Status inactive since May 1955
Rating over time high 1787 · low 1373 Nov 1943 Apr 1956 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: 44 of 61 bouts.
L
For NBA and The Ring flyweight titles May 30, 1955 · KO 5/15 · weight ×1.65 · opponent 2052
L
Lost NBA and The Ring flyweight titles Nov 26, 1954 · UD 15/15 · weight ×1.65 · opponent 1971
W
Takashi Seno (no page: counted as 1100)
Sep 18, 1954 · KO 4/8 · weight ×1.00
W
Aug 11, 1954 · PTS 10/10 · weight ×1.05 · opponent 1590
D
Jul 24, 1954 · PTS 10/10 · weight ×1.05 · opponent 2047
W
Leo Espinosa (no page: counted as 1100)
Retained NBA and The Ring flyweight titles May 24, 1954 · SD 15/15 · weight ×1.65
W
Masaru Kaneko (no page: counted as 1100)
Apr 8, 1954 · RTD 8/10 · weight ×1.05
W
Takashi Senoo (no page: counted as 1100)
Dec 20, 1953 · KO 5 · weight ×1.00
W
Retained NBA and The Ring flyweight titles Oct 27, 1953 · UD 15/15 · weight ×1.65 · opponent 1530
L
Leo Espinosa (no page: counted as 1100)
Sep 19, 1953 · RTD 7/10 · weight ×1.05
W
Vic Herman (no page: counted as 1100)
Jul 17, 1953 · TKO 10/10 · weight ×1.05
W
Tanny Campo (no page: counted as 1100)
Retained NBA and The Ring flyweight titles May 18, 1953 · UD 15/15 · weight ×1.65
W
Mario Macias (no page: counted as 1100)
Apr 17, 1953 · UD 10/10 · weight ×1.05
W
Retained NBA and The Ring flyweight titles Nov 15, 1952 · UD 15/15 · weight ×1.65 · opponent 1611
W
Roy Higa (no page: counted as 1100)
Sep 26, 1952 · UD 10/10 · weight ×1.05
W
Won NBA and The Ring flyweight titles May 19, 1952 · UD 15/15 · weight ×1.65 · opponent 1641
W
Kyoichi Muto (no page: counted as 1100)
Apr 4, 1952 · RTD 6/8 · weight ×1.00
W
Retained Japan bantamweight title Feb 9, 1952 · UD 10/10 · weight ×1.10 · opponent 1310
W
Dec 4, 1951 · TKO 7/10 · weight ×1.05 · opponent 1665
W
Takahisa Horiguchi (no page: counted as 1100)
Retained Japan flyweight title Oct 25, 1951 · KO 6/10 · weight ×1.10
Show all 61 counted bouts W
Hidemasa Nagashima (no page: counted as 1100)
Won Japan bantamweight title Sep 20, 1951 · PTS 10/10 · weight ×1.10
L
May 21, 1951 · SD 10/10 · weight ×1.05 · opponent 1573
L
Hidemasa Nagashima (no page: counted as 1100)
Lost Japan bantamweight title Mar 17, 1951 · DQ 8/10 · weight ×1.10
W
Yukio Takahashi (no page: counted as 1100)
Feb 3, 1951 · DQ 7/10 · weight ×1.05
W
Takashi Seno (no page: counted as 1100)
Retained Japan bantamweight title Oct 26, 1950 · PTS 10/10 · weight ×1.10
W
Katsumi Kobayashi (no page: counted as 1100)
Sep 25, 1950 · KO 2/10 · weight ×1.05
W
Takeshi Nomura (no page: counted as 1100)
Aug 26, 1950 · KO 5 · weight ×1.00
W
Hideo Kijima (no page: counted as 1100)
Retained Japan flyweight title Jun 28, 1950 · KO 2/10 · weight ×1.10
W
Retained Japan bantamweight title May 25, 1950 · PTS 10/10 · weight ×1.10 · opponent 1464
W
Yoshiaki Nario (no page: counted as 1100)
Apr 14, 1950 · PTS 8/8 · weight ×1.00
W
Mamoru Murata (no page: counted as 1100)
Feb 6, 1950 · KO 2 · weight ×1.00
W
Won Japan bantamweight title Dec 15, 1949 · UD 10/10 · weight ×1.10 · opponent 1500
W
Kyoichi Muto (no page: counted as 1100)
Sep 28, 1949 · KO 3/8 · weight ×1.00
W
Retained Japan flyweight title Jun 25, 1949 · PTS 10/10 · weight ×1.10 · opponent 1495
W
Eijiro Yajima (no page: counted as 1100)
May 2, 1949 · PTS 10/10 · weight ×1.05
W
Tomoyoshi Yanagida (no page: counted as 1100)
Mar 21, 1949 · KO 2/10 · weight ×1.05
W
Won Japan flyweight title Jan 28, 1949 · KO 5/10 · weight ×1.10 · opponent 1629
W
Oct 9, 1948 · SD 8/8 · weight ×1.00 · opponent 1776
W
Eijiro Yajima (no page: counted as 1100)
Sep 11, 1948 · UD 8/8 · weight ×1.00
W
Nobuyuki Ishimori (no page: counted as 1100)
Jul 30, 1948 · KO 2/8 · weight ×1.00
W
Kiyoshi Nishimura (no page: counted as 1100)
Jul 10, 1948 · PTS 8/8 · weight ×1.00
D
Kunimatsu Suda (no page: counted as 1100)
Jun 21, 1948 · PTS 6/6 · weight ×0.90
D
Eijiro Yajima (no page: counted as 1100)
Jun 6, 1948 · PTS 8/8 · weight ×1.00
W
Sadaji Wada (no page: counted as 1100)
May 7, 1948 · PTS 8/8 · weight ×1.00
W
Kazumi Ueda (no page: counted as 1100)
Apr 3, 1948 · PTS 6/6 · weight ×0.90
W
Kazumi Ueda (no page: counted as 1100)
Feb 15, 1948 · PTS 6/6 · weight ×0.90
W
Michiyosi Koizumi (no page: counted as 1100)
Dec 25, 1947 · KO 2/6 · weight ×0.90
D
Takeshi Makino (no page: counted as 1100)
Oct 27, 1947 · PTS 8/8 · weight ×1.00
L
Eijiro Yajima (no page: counted as 1100)
Sep 11, 1947 · PTS 8/8 · weight ×1.00
L
Jul 18, 1947 · PTS 8/8 · weight ×1.00 · opponent 1406
W
Toshimitsu Kushihashi (no page: counted as 1100)
Jul 6, 1947 · PTS 6/6 · weight ×0.90
W
Kazumi Ueda (no page: counted as 1100)
Jun 27, 1947 · PTS 6/6 · weight ×0.90
L
Dec 14, 1946 · KO 5/8 · weight ×1.00 · opponent 1500
W
Sakae Suzuki (no page: counted as 1100)
Mar 28, 1944 · KO 1/6 · weight ×0.90
W
Sadasuke Aoki (no page: counted as 1100)
Mar 5, 1944 · PTS 4/4 · weight ×0.80
W
Shigeo Tanaka (no page: counted as 1100)
Feb 10, 1944 · PTS 4/4 · weight ×0.80
W
Makoto Yamada (no page: counted as 1100)
Feb 6, 1944 · KO 1/4 · weight ×0.80
W
Masao Ito (no page: counted as 1100)
Jan 20, 1944 · KO 1/4 · weight ×0.80
W
Tomisaburo Oura (no page: counted as 1100)
Dec 23, 1943 · PTS 4/4 · weight ×0.80
W
Saichi Kubota (no page: counted as 1100)
Dec 10, 1943 · KO 1/4 · weight ×0.80
W
Jumpo Umiyama (no page: counted as 1100)
Nov 26, 1943 · KO 1/4 · weight ×0.80
Publishers and Boxerbook Consensus: no publisher lists for the division (a list without them counts as 16).
How the Boxerbook rating works · Yoshio Shirai: record and titles