Koyama Shizuo
Koyama Shizuo (小山鎮男) has a rating of 1393.
Retired. The rating shown is the rating at retirement.
Koyama Shizuo小山鎮男Nihon Ki-in
Rating1393
Rank—
1-year change—
Peak rating—
Last 10LossWinWinLossLossLossLossWinLossLoss38-84
- 2005 record
- 1-3
- Record since 1927
- 38-84
- Win rate
- .311
Rating at retirement (not included in the rating list)
The rating is calculated from published game results. It does not include any adjustment for playing Black.
Professional ratingsFind a player
Recent games
| Date | Opponent and tournament | Result | Change |
|---|---|---|---|
| April 14, 2005 | Ko MoseiJudan Colors unknown | Loss | ↓12 |
| March 24, 2005 | Nobuta ShigehitoGosei Colors unknown | Loss | ↓19 |
| March 3, 2005 | Kanashima TadashiJudan Colors unknown | Win | ↑16 |
| February 17, 2005 | Asano HideakiTengen Colors unknown | Loss | ↓18 |
| December 2, 2004 | Tahara YasufumiHoninbo Colors unknown | Loss | ↓11 |
| October 21, 2004 | Iguchi ToyohideMeijin Colors unknown | Loss | ↓11 |
| October 14, 2004 | Ko IunKisei Colors unknown | Loss | ↓11 |
| September 2, 2004 | Okada YumikoKisei Colors unknown | Win | ↑16 |
| August 5, 2004 | Takahashi HideoKisei Colors unknown | Win | ↑21 |
| July 29, 2004 | Ko ReibunJudan Colors unknown | Loss | ↓12 |
| July 15, 2004 | Taniguchi ToshinoriKisei Colors unknown | Win | ↑18 |
| June 17, 2004 | So YokokuGosei Colors unknown | Loss | ↓2 |
| June 3, 2004 | Nakayama NoriyukiJudan Colors unknown | Win | ↑11 |
| May 17, 2004 | Gaku YuzuruRyusei Colors unknown | Loss | ↓21 |
| May 17, 2004 | Nakamura KunikoRyusei Colors unknown | Win | ↑12 |
| May 13, 2004 | Rin ShienOza Colors unknown | Loss | ↓6 |
| April 8, 2004 | Kanno NaomiJudan Colors unknown | Win | ↑14 |
| March 8, 2004 | Umezawa YukariAgon Kiriyama Cup Colors unknown | Loss | ↓9 |
| February 23, 2004 | Shiraishi YuichiAgon Kiriyama Cup Colors unknown | Win | ↑21 |
| February 19, 2004 | Shimoji GenshoMeijin Colors unknown | Loss | ↓16 |
Head-to-head
| Opponent | Total | As Black | As White |
|---|---|---|---|
| Asano Hideaki | 1-3.250 | 0-0 | 1-2 |
| Ohira Shuzo | 0-3.000 | 0-1 | 0-2 |
| Kanno Kiyonori | 2-1.667 | 0-1 | 2-0 |
| Kuwahara Munehisa | 3-01.000 | 2-0 | 1-0 |
| Awaji Shuzo | 0-3.000 | 0-0 | 0-3 |
| Sakata Eio | 0-2.000 | 0-0 | 0-2 |
| Kobayashi Reiko | 2-01.000 | 1-0 | 1-0 |
| Tanimiya Teiji | 1-1.500 | 0-0 | 0-1 |
| Sugiuchi Kazuko | 1-1.500 | 1-0 | 0-1 |
| O Rissei | 1-1.500 | 0-1 | 1-0 |
Record by year
Counted by calendar year, January to December (default wins and losses are included; jigo and no-result games are not). Only games from 1927 onward are counted, so these totals do not match the career records published by the two Ki-in.
| Year | Record | Win rate |
|---|---|---|
| 2005 | 1-3 | .250 |
| 2004 | 7-11 | .389 |
| 2003 | 6-9 | .400 |
| 2002 | 4-7 | .364 |
| 2001 | 0-1 | .000 |
| 1999 | 1-1 | .500 |
| 1995 | 0-1 | .000 |
| 1994 | 0-1 | .000 |
| 1992 | 0-2 | .000 |
| 1991 | 0-1 | .000 |
| 1989 | 0-1 | .000 |
| 1988 | 0-1 | .000 |
| 1987 | 0-1 | .000 |
| 1984 | 0-1 | .000 |
| 1982 | 0-1 | .000 |
| 1981 | 0-1 | .000 |
| 1980 | 0-2 | .000 |
| 1979 | 1-1 | .500 |
| 1978 | 1-2 | .333 |
| 1977 | 1-0 | 1.000 |
| 1976 | 2-1 | .667 |
| 1975 | 2-6 | .250 |
| 1974 | 1-7 | .125 |
| 1973 | 2-7 | .222 |
| 1972 | 5-8 | .385 |
| 1971 | 1-3 | .250 |
| 1970 | 1-0 | 1.000 |
| 1968 | 1-1 | .500 |
| 1967 | 0-1 | .000 |
| 1966 | 1-2 | .333 |
| Total | 38-84 | .311 |
Calculated from games played between 1927 and 2026 (as of September 17, 2026).