Kubota Masaru
Kubota Masaru (久保田大) has a rating of 1418, ranked 335 of 452 in professional play. Their highest rating so far is 1492 (March 27, 2006).
Kubota Masaru4 dan久保田大Kansai Ki-in
Rating1418
Rank335
1-year change↓16
Peak rating1492
Last 10LossLossWinLossLossWinLossWinLossLoss11-23
- 2026 record
- 0-1
- Record since 1927
- 11-23
- Win rate
- .324
The rating is calculated from published game results. It does not include any adjustment for playing Black.
Professional ratingsFind a player
Rating history — professional
The “All” view starts at 2006; earlier years are used only to warm up the calculation and are not shown.
Recent games
| Date | Opponent and tournament | Result | Change |
|---|---|---|---|
| January 14, 2026 | Imai KazuhiroKisei First Tournament Preliminary Round 1 Colors unknown | Loss | ↓16 |
| January 8, 2025 | Ha YoungilKisei First Tournament Preliminary Round 1 Colors unknown | Loss | ↓3 |
| August 19, 2024 | 兼田雅史Kansai Ki-in First Place Tournament Preliminary as White | Win | ↑16 |
| February 22, 2024 | Terada ShutaKisei First Tournament Preliminary Round 2 Colors unknown | Loss | ↓8 |
| January 10, 2024 | Ono KojiKisei First Tournament Preliminary Round 1 Colors unknown | Win | ↑16 |
| December 15, 2022 | Ota RyoKisei First Tournament Preliminary Round 1 Colors unknown | Loss | ↓12 |
| February 10, 2022 | Yata NaokiKisei First Tournament Preliminary Round 2 Colors unknown | Loss | ↓11 |
| January 6, 2022 | Enda HidekiKisei First Tournament Preliminary Round 1 Colors unknown | Win | ↑22 |
| February 11, 2021 | Takao MariKisei First Tournament Preliminary Round 2 Colors unknown | Loss | ↓18 |
| November 21, 2019 | Kori ToshioKisei First Tournament Preliminary Round 2 Colors unknown | Loss | ↓15 |
| November 29, 2018 | Kitano RyoKisei First Tournament Preliminary Round 2 Colors unknown | Loss | ↓8 |
| November 1, 2018 | 諸留康博Kisei First Tournament Preliminary Round 1 Colors unknown | Win | ↑21 |
| November 24, 2017 | Kikuchi MasatoshiKisei First Tournament Preliminary Round 1 Colors unknown | Loss | ↓17 |
| October 26, 2017 | Matsuoka HidekiKisei First Tournament Preliminary Round 1 Colors unknown | Loss | ↓7 |
| January 14, 2017 | Ishii KunioKisei First Tournament Preliminary Quarterfinal Colors unknown | Loss | ↓9 |
| December 3, 2016 | Sakamoto YasuoKisei First Tournament Preliminary Round 2 Colors unknown | Win | ↑18 |
| November 24, 2016 | Kikuchi MasatoshiKisei First Tournament Preliminary Round 1 Colors unknown | Loss | ↓17 |
| January 22, 2016 | Ishii KunioKisei First Tournament Preliminary Round 2 Colors unknown | Loss | ↓7 |
| December 11, 2015 | Kirimoto KazuoKisei First Tournament Preliminary Round 1 Colors unknown | Win | ↑7 |
| April 8, 2009 | Miyamoto YoshihisaKansai Ki-in First Place Tournament Round 2 as Black | Loss | ↓11 |
Head-to-head
| Opponent | Total | As Black | As White |
|---|---|---|---|
| Kikuchi Masatoshi | 0-2.000 | 0-0 | 0-0 |
| Ishii Kunio | 0-2.000 | 0-0 | 0-0 |
| Ono Koji | 1-01.000 | 0-0 | 0-0 |
| Tsujii Ryotaro | 1-01.000 | 0-0 | 0-0 |
| Hashiguchi Mika | 1-01.000 | 0-0 | 0-0 |
| Anzai Nobuaki | 0-1.000 | 0-1 | 0-0 |
| Yata Naoki | 0-1.000 | 0-0 | 0-0 |
| Tsuruyama Atsushi | 0-1.000 | 0-0 | 0-1 |
| Enda Hideki | 1-01.000 | 0-0 | 0-0 |
| Kirimoto Kazuo | 1-01.000 | 0-0 | 0-0 |
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 |
|---|---|---|
| 2026 | 0-1 | .000 |
| 2025 | 0-1 | .000 |
| 2024 | 2-1 | .667 |
| 2022 | 1-2 | .333 |
| 2021 | 0-1 | .000 |
| 2019 | 0-1 | .000 |
| 2018 | 1-1 | .500 |
| 2017 | 0-3 | .000 |
| 2016 | 1-2 | .333 |
| 2015 | 1-0 | 1.000 |
| 2009 | 0-2 | .000 |
| 2008 | 0-1 | .000 |
| 2006 | 1-1 | .500 |
| 2005 | 0-2 | .000 |
| 2004 | 1-2 | .333 |
| 2003 | 3-1 | .750 |
| 2002 | 0-1 | .000 |
| Total | 11-23 | .324 |
Calculated from games played between 1927 and 2026 (as of September 17, 2026).