Go Player Ratings

JAAbout ratings

Hosaka Mayu

Hosaka Mayu (穂坂繭) has a rating of 1131, ranked 437 of 452 in professional play. Their highest rating so far is 1365 (November 5, 2010).

Hosaka Mayu3 dan穂坂繭Nihon Ki-in Tokyo
Rating1131
Rank437
1-year change↑56
Peak rating1365
Last 1039-172
2026 record
3-7
Record since 1927
39-172
Win rate
.185

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

Professional ratingsFind a player

Rating history — professional

10 gamesHigh 1141Low 1075
31 gamesHigh 1141Low 1075
54 gamesHigh 1177Low 1075
171 gamesHigh 1365Low 1075

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

Rating history in the women's tournaments pool (for reference)

4 gamesHigh 1334Low 1315
15 gamesHigh 1349Low 1315
31 gamesHigh 1354Low 1306
88 gamesHigh 1477Low 1306

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

Ratings in other pools

Ratings for general play and for women's tournaments are calculated independently and do not affect each other.

  • Women's tournaments: 1315 (#78)

Recent games

Up to 20 games, newest first. “Change” is the rating movement.
DateOpponent and tournamentResultChange
August 27, 2026Jo BunenWomen's Kisei　Colors unknown↓2
June 29, 2026Kawahara YuHoninbo　Colors unknown↓2
May 11, 2026Ko IunOza　Colors unknown↓4
April 16, 2026Ishida YoshioTengen　Colors unknown↓4
April 9, 2026Doi MakotoHoninbo　Colors unknown↑19
March 26, 2026Arai KantaGosei　Colors unknown↓3
March 19, 2026Kubo HideoJudan　Colors unknown↓2
March 5, 2026Nakamura HidehitoGosei　Colors unknown↑29
February 26, 2026Yoshihara YukariKisei First Tournament Preliminary Round 2　Colors unknown↓4
January 29, 2026Takahashi HideoJudan　Colors unknown↑27
December 15, 2025Okuda AyaWomen's Honinbo Preliminary Final　as Black↓2
December 4, 2025Kim SujunMeijin　Colors unknown±0
November 24, 2025Komatsu HidekoSenko Cup Women's Strongest Player Preliminary Round 1　Colors unknown↓15
October 9, 2025Nakayama KaoruWomen's Honinbo Preliminary Round 1　Colors unknown↑10
August 21, 2025Takemiya YokoSGW Cup Chuyo Preliminary Round 1　as White↓2
August 11, 2025Izawa AkinoWomen's Kisei　Colors unknown↓7
July 14, 2025O MeienRyusei　Colors unknown↓1
June 19, 2025Komatsu HidekoWomen's Meijin　Colors unknown↓15
June 2, 2025Muramatsu RyuichiOza　Colors unknown↓5
May 25, 2025Jo BunenTengen　Colors unknown↓2

Head-to-head

Up to 10 opponents, most-played first. Records are from Hosaka Mayu'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
Nakayama Kaoru4-4.5002-00-0
Kin En4-4.5001-00-1
Aoki Kikuyo0-8.0000-10-1
Okada Yumiko3-4.4290-01-1
Tanimiya Ayako6-1.8570-01-0
Komatsu Hideko3-3.5001-00-0
Koyama Terumi0-5.0000-00-0
Kobayashi Izumi0-5.0000-00-2
Kanno Naomi3-2.6000-00-1
Jo Bunen0-4.0000-00-0

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
20263-7.300
20251-14.067
20242-15.118
20235-15.250
20221-15.063
20212-17.105
20205-12.294
20193-16.158
20187-16.304
20171-20.048
20162-14.125
20154-14.222
20142-4.333
20134-7.364
20122-8.200
20112-9.182
20101-1.500
20092-1.667
20060-5.000
20058-12.400
20048-11.421
20031-8.111
20021-6.143
20000-1.000
19992-2.500
19981-1.500
19940-2.000
19932-3.400
19921-2.333
19916-3.667
19901-01.000
Total39-172.185

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