Go Player Ratings

JAAbout ratings

Mochizuki Kenichi

Mochizuki Kenichi (望月研一) has a rating of 1815, ranked 75 of 452 in professional play. Their highest rating so far is 1907 (June 24, 2021).

Mochizuki Kenichi8 dan望月研一Nihon Ki-in Tokyo
Rating1815
Rank75
1-year change↑63
Peak rating1907
Last 10343-227
2026 record
14-6
Record since 1927
343-227
Win rate
.602

The rating is calculated from published game results. It does not include any adjustment for playing Black.

Professional ratingsFind a player

Rating history — professional

25 gamesHigh 1842Low 1747
79 gamesHigh 1866Low 1733
129 gamesHigh 1866Low 1733
451 gamesHigh 1907Low 1676

The “All” view starts at 2006; earlier years are used only to warm up the calculation and are not shown.

Recent games

Up to 20 games, newest first. “Change” is the rating movement.
DateOpponent and tournamentResultChange
September 10, 2026Onishi RyuheiHoninbo Preliminary A　as Black↓4
August 27, 2026Okuda AyaSGW Cup Chuyo Preliminary Semifinal　Colors unknown↑9
August 27, 2026Kikkawa HajimeSGW Cup Chuyo Preliminary Round 1　Colors unknown↑11
August 17, 2026Ishida YoshioTengen　Colors unknown↑5
July 27, 2026Ishigure IkuroHoninbo　Colors unknown↑9
June 29, 2026Mannami KanaHoninbo　Colors unknown↑4
June 22, 2026Iguchi ToyohideJudan　Colors unknown↓19
May 18, 2026Takeshita NanaHoninbo　Colors unknown↑3
May 11, 2026Komatsu HidekiJudan　Colors unknown↑15
April 30, 2026Tsuneishi TakashiGosei　Colors unknown↓19
April 27, 2026Akiyama JiroMeijin　Colors unknown↓13
April 16, 2026Shimojima YoheiOza Final Preliminary Final　as Black↓19
April 2, 2026Shoji KazukoHoninbo　Colors unknown±0
March 26, 2026Koyama TerumiGosei　Colors unknown↑7
March 16, 2026Mitani TetsuyaKisei First Tournament Preliminary Quarterfinal　Colors unknown↓16
March 9, 2026Fujii ShuyaOza Final Preliminary　as White↑15
February 23, 2026Yanai KazumaGosei　Colors unknown↑7
February 16, 2026Mori ChisakiKisei First Tournament Preliminary Round 2　Colors unknown↑3
January 26, 2026Tajiri YutoMeijin　Colors unknown↑13
January 19, 2026Kaneko MakiKisei First Tournament Preliminary Round 1　Colors unknown↑2

Head-to-head

Up to 10 opponents, most-played first. Records are from Mochizuki Kenichi's point of view; jigo and no-result games are not counted as wins or losses. Only games from 1927 onward are included.
OpponentTotalAs BlackAs White
Matsumoto Takehisa5-4.5562-21-1
Rin Shien2-6.2501-20-0
So Yokoku4-4.5001-10-1
Yoda Norimoto3-4.4292-11-3
Tsuneishi Takashi5-2.7140-00-0
Hirose Yuichi3-4.4291-10-1
Awaji Shuzo4-3.5711-00-0
O Rissei2-5.2861-21-2
Oba Junya3-4.4290-01-1
Rin Kanketsu4-3.5710-00-1
Ishida Yoshio6-01.0000-01-0
Mizokami Tomochika3-3.5000-11-0
Mitani Tetsuya3-3.5001-01-2
Yamada Shinji3-3.5000-00-1
Kono Mitsuki3-3.5002-00-0
Akiyama Jiro0-5.0000-10-3
Mimura Tomoyasu3-2.6000-10-0
Shuto Shun3-2.6000-02-0
Suzuki Ayumi3-2.6000-11-0
Kono Takashi4-1.8000-01-0
Han Zenki2-3.4001-10-1
Suzuki Shinji2-3.4001-00-0
Yuki Satoshi0-5.0000-20-3
Ko Reibun5-01.0001-00-0

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.

YearRecordWin rate
202614-6.700
202514-9.609
202414-14.500
202320-9.690
202212-12.500
202116-10.615
202021-11.656
201913-13.500
201819-11.633
201721-13.618
201611-9.550
20156-6.500
20147-11.389
20138-9.471
201220-9.690
20119-9.500
20106-4.600
20094-5.444
20084-7.364
20079-6.600
200613-10.565
200515-7.682
200423-11.676
200329-8.784
200213-7.650
20002-1.667
Total343-227.602

Calculated from games played between 1927 and 2026 (as of September 17, 2026).