Boxers / Sarutobi Koyama / Boxerbook rating

Sarutobi Koyama: Boxerbook rating

Sarutobi Koyama has a Boxerbook rating of 1480 ± 290 from 37 counted bouts, as of Oct 13, 2026. Not in a division list: inactive since Mar 1973 (no bout for 12 months).

Rating1480 ± 290
Placenot listed
Counted bouts37
Unknown opponents35 of 37
Schedule, career1115
Schedule, 36 monthsno bouts
Form, last 51.8 of 3.5
Data confidence5%
Statusinactive since Mar 1973

Rating over time

high 1640 · low 1406Jan 1967Feb 1974

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: 35 of 37 bouts.

L
Seiichi Eto (no page: counted as 1100)
Mar 26, 1973 · DEC 10/10 · weight ×1.05
−49
→ 1480
W
Tetsuro Kawakami (no page: counted as 1100)
Japanese super bantamweight title, 4th defence
Dec 18, 1972 · DEC 10/10 · weight ×1.10
+10
→ 1529
L
Kuei-zhe Zhang (no page: counted as 1100)
OBF super bantamweight title challenge
Oct 6, 1972 · KO 10 · weight ×1.05
−52
→ 1519
W
Hiroshi Ishibashi (no page: counted as 1100)
Japanese super bantamweight title, 3rd defence
Aug 20, 1972 · TKO 4 · weight ×1.05
+9
→ 1571
W
Joe Saloma (no page: counted as 1100)
May 19, 1972 · TKO 6 · weight ×1.00
+9
→ 1562
W
Yoshinobu Goto (no page: counted as 1100)
Japanese super bantamweight title, 2nd defence
Mar 25, 1972 · DEC 10/10 · weight ×1.10
+10
→ 1554
D
Tadd Okamoto (no page: counted as 1100)
Jul 26, 1971 · DEC 10/10 · weight ×1.05
−22
→ 1543
W
Attack Harada (no page: counted as 1100)
Japanese super bantamweight title, 1st defence
Apr 29, 1971 · DEC 10/10 · weight ×1.10
+10
→ 1565
W
Takeo Harada (no page: counted as 1100)
Won Japanese super bantamweight title
Feb 17, 1971 · TD 9 · weight ×1.05
+10
→ 1556
W
Tsugio Mineyama (no page: counted as 1100)
Dec 16, 1970 · DEC 10/10 · weight ×1.05
+10
→ 1546
W
Ken Hoshi (no page: counted as 1100)
Oct 7, 1970 · DEC 8/8 · weight ×1.00
+10
→ 1536
W
Tadd Okamoto (no page: counted as 1100)
Aug 14, 1970 · KO 3 · weight ×1.00
+11
→ 1526
W
Samurai Hagiri (no page: counted as 1100)
Jun 25, 1970 · DEC 10/10 · weight ×1.05
+12
→ 1515
W
Hiroshi Ishibashi (no page: counted as 1100)
Apr 29, 1970 · DEC 6/6 · weight ×0.90
+11
→ 1503
W
Takeo Harada (no page: counted as 1100)
Mar 7, 1970 · DEC 10/10 · weight ×1.05
+14
→ 1492
W
Baron Kumasawa (no page: counted as 1100)
Jan 14, 1970 · KO 3 · weight ×1.00
+14
→ 1479
L
Kazuyoshi Kanazawa
Nov 9, 1969 · KO 5 · weight ×1.00 · opponent 1519
−51
→ 1465
W
Masataka Uno
Sep 24, 1969 · TKO 7 · weight ×1.00 · opponent 1248
+25
→ 1516
W
Takeo Harada (no page: counted as 1100)
Aug 27, 1969 · DEC 8/8 · weight ×1.00
+18
→ 1491
W
Susumu Yokota (no page: counted as 1100)
Jun 25, 1969 · DEC 8/8 · weight ×1.00
+20
→ 1472
Show all 37 counted bouts
W
Isao Nitta (no page: counted as 1100)
Feb 5, 1969 · KO 1 · weight ×1.00
+23
→ 1452
W
Hiroyasu Ishikawa (no page: counted as 1100)
Dec 4, 1968 · DEC 6/6 · weight ×0.90
+23
→ 1429
L
Mikio Inui (no page: counted as 1100)
Sep 25, 1968 · DEC 6/6 · weight ×0.90
−87
→ 1406
W
Mamoru Minami (no page: counted as 1100)
Aug 21, 1968 · DEC 8/8 · weight ×1.00
+24
→ 1493
L
Takeo Tamasha (no page: counted as 1100)
Jul 22, 1968 · DEC 8/8 · weight ×1.00
−117
→ 1468
W
Kazuyuki Asanuma (no page: counted as 1100)
Jun 5, 1968 · TKO 6 · weight ×1.00
+20
→ 1585
D
Masaru Yoshida (no page: counted as 1100)
Apr 3, 1968 · DEC 6/6 · weight ×0.90
−52
→ 1565
W
Shigeo Morioka (no page: counted as 1100)
Mar 6, 1968 · DEC 6/6 · weight ×0.90
+19
→ 1617
W
Mikio Inui (no page: counted as 1100)
Jan 15, 1968 · KO 4 · weight ×1.00
+24
→ 1598
W
Seiichi Watanuki (no page: counted as 1100)
Dec 18, 1967 · KO 6 · weight ×1.00
+28
→ 1574
W
Teruo Nishimura (no page: counted as 1100)
Nov 18, 1967 · DEC 4/4 · weight ×0.80
+27
→ 1546
W
Kazutoshi Mihara (no page: counted as 1100)
Oct 20, 1967 · DEC 4/4 · weight ×0.80
+33
→ 1519
L
Kenzo Ishibashi (no page: counted as 1100)
Jul 31, 1967 · DEC 4/4 · weight ×0.80
−175
→ 1487
W
Teruo Nishimura (no page: counted as 1100)
Jul 4, 1967 · DEC 4/4 · weight ×0.80
+22
→ 1487
W
Teruo Nishimura (no page: counted as 1100)
May 10, 1967 · KO 1 · weight ×1.00
+36
→ 1640
W
Shigeru Abe (no page: counted as 1100)
Mar 5, 1967 · KO 1 · weight ×1.00
+49
→ 1604
W
Haruhiko Yoshida (no page: counted as 1100)
Jan 8, 1967 · DEC 4/4 · weight ×0.80
+55
→ 1555

Publishers and Boxerbook

Consensus: no publisher lists for the division (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 · Sarutobi Koyama: record and titles