Player · 42 career games · 2025-26–2026-27
Ishii Kazuma
In style, stands out for speed-first hands that maximise ukeire. Career record: +3.2pt per game, but allowing for luck the difference from average is not clear yet.
Actual / game
+3.2
42 career games
Skill estimate / game
+0.3
90% interval -4.9 to +5.5
Estimate, luck removed
+0.5
adjusted for starting hands, draws, ura-dora
Weight of the record
9%
share of the estimate from the record
Styleleague percentile, career
Colour only for metrics with a good side (red = good, blue = bad). Metrics of style, such as riichi rate, call rate and efficiency match rate, are grey. For tenpai turn, further right means later (a larger turn number). Values are estimates.
Placements42 career games, average placement 2.40
- 1st33.3%14×
- 2nd16.7%7×
- 3rd26.2%11×
- 4th23.8%10×
Riichi and callsbalance and outcome of hands with riichi or calls
Income is the average points won or lost in those hands (riichi sticks and honba included).
Net efficiency and morecalculated as on Mahjong Soul Paifuya, per hand
Deal-in loss = deal-in rate × average deal-in; net efficiency = win rate × average win − deal-in loss. Win and deal-in values include honba and riichi sticks. Win turn is the number of tiles discarded at the table when the win came ÷ 4 + 1. Win efficiency (win rate × average win) is not shown: players with a high win rate win smaller hands, the two cancel out, and differences between players cannot be told apart from chance.
Skill estimateleague percentile of the estimates
Luckfurther right is luckier; values are differences from the league average (the dealer tsumo rate is the rate itself)
Where the points came fromchange in expected points, all stages
As a table
| Hand result | Hands | Total | Per game |
|---|---|---|---|
| Own wins | 104 | +1901.9 | +45.3 |
| Deal-ins | 47 | -656.6 | -15.6 |
| Others' tsumo | 148 | -1061.3 | -25.3 |
| Ron between others | 125 | -36.7 | -0.9 |
| Draws | 64 | -17.9 | -0.4 |
Hand balance breakdownpoints won or lost per hand, all stages
| Category | Frequency | Balance per hand | League average | Difference |
|---|---|---|---|---|
| Wins with riichi | 11.9% | +942 | +924 | +18 |
| Wins with calls | 7.8% | +333 | +381 | -48 |
| Dama wins | 1.6% | +113 | +175 | -63 |
| Deal-ins to riichi | 3.9% | -259 | -361 | +102 |
| Deal-ins to open hands | 4.3% | -167 | -203 | +36 |
| Deal-ins to dama | 1.4% | -118 | -102 | -16 |
| Others' tsumo | 30.3% | -817 | -757 | -61 |
| Other (draws etc.) | 38.7% | -61 | -59 | -2 |
| Total (per hand) | -36 |
Every career number (estimate, 90% interval, weight of the record)
| Metric | Actual | Estimate (90% interval) | Weight of the record | Percentile | Count |
|---|---|---|---|---|---|
| Average placement | 2.40 | 2.49 (2.37 to 2.61) | 8% | 65 | 42 games |
| Points per game | 3.2 | 0.3 (-4.9 to 5.5) | 9% | 61 | 42 games |
| Points per game, luck removed | 4.1 | 0.5 (-4.4 to 5.4) | 12% | 61 | 42 games |
| 1st-place rate | 33.3% | 25.3% (22.2% to 28.3%) | 3% | 71 | 42 games |
| 4th-place rate | 23.8% | 24.7% (18.7% to 30.8%) | 16% | 57 | 42 games |
| Metric | Actual | Estimate (90% interval) | Weight of the record | Percentile | Count |
|---|---|---|---|---|---|
| Win rate | 21.3% | 20.4% (18.5% to 22.3%) | 31% | 69 | 488 hands |
| Deal-in rate | 9.6% | 10.5% (9.0% to 12.0%) | 32% | 73 | 488 hands |
| Riichi rate | 23.2% | 22.9% (20.7% to 25.1%) | 45% | 53 | 488 hands |
| Call rate | 27.7% | 27.1% (24.2% to 30.0%) | 89% | 81 | 488 hands |
| First riichi rate | 75.2% | 75.8% (71.8% to 79.9%) | 24% | 40 | 113 riichi |
| Average riichi turn | 9.17 | 9.30 (8.98 to 9.61) | 29% | 63 | 113 riichi |
| Average win value | 5,879 | 6,408 (5,944 to 6,872) | 28% | 18 | 104 wins |
| Average deal-in value | 5,347 | 5,605 (5,113 to 6,097) | 13% | 65 | 47 deal-ins |
| Win efficiency | 1,388 | 1,480 (1,425 to 1,536) | 0% | 50 | 488 hands |
| Deal-in loss | 524 | 619 (521 to 716) | 19% | 79 | 488 hands |
| Net efficiency | 864 | 843 (666 to 1,020) | 14% | 57 | 488 hands |
| Push rate vs riichi (1-shanten) | 36.0% | 39.1% (33.0% to 45.2%) | 33% | 24 | 75 hands facing riichi |
| Push rate vs riichi (2+ shanten) | 28.0% | 26.7% (21.4% to 32.0%) | 47% | 57 | 93 hands facing riichi |
| Tenpai rate after the first call | 23.0% | 23.8% (18.6% to 29.0%) | 70% | 30 | 135 first calls |
| Average win turn | 11.69 | 12.31 (12.05 to 12.57) | 11% | 90 | 104 wins |
| Tenpai rate at draws | 37.5% | 39.4% (33.3% to 45.6%) | 24% | 44 | 64 draws |
| Staying in vs riichi | 11.6% | 13.9% (12.5% to 15.3%) | 6% | 34 | 249 hands facing riichi |
| Efficiency match rate | 76.0% | 75.7% (74.3% to 77.0%) | 88% | 90 | 2,597 discards |
| Average ukeire loss (tiles) | 0.91 | 0.94 (0.85 to 1.02) | 81% | 7 | 2,491 discards |
| Breaking shape for value | 1.3% | 1.5% (1.2% to 1.9%) | 70% | 1 | 2,597 discards |
| Tenpai turn (luck-adjusted) | 8.06 | 8.17 (8.03 to 8.30) | 8% | 40 | 100 tenpai hands |
| Immediate riichi rate | 73.4% | 72.4% (66.9% to 77.9%) | 52% | 65 | 100 tenpai hands |
| Dama rate | 7.7% | 9.8% (5.4% to 14.3%) | 63% | 18 | 104 wins |
| Riichi income | 2,859 | 2,691 (2,018 to 3,364) | 23% | 63 | 113 riichi |
| Riichi win rate | 51.3% | 48.1% (42.9% to 53.2%) | 37% | 88 | 113 riichi |
| Riichi deal-in rate A | 9.7% | 14.3% (13.1% to 15.4%) | 1% | 79 | 113 riichi |
| Riichi deal-in rate B | 8.8% | 10.9% (9.2% to 12.7%) | 5% | 71 | 113 riichi |
| Riichi good-wait rate | 57.5% | 52.3% (47.2% to 57.3%) | 32% | 90 | 113 riichi |
| Riichi draw rate | 13.3% | 17.1% (13.1% to 21.2%) | 34% | 22 | 113 riichi |
| Call income | -163 | 403 (64.35 to 742) | 13% | 15 | 135 calls |
| Win rate after calling | 28.1% | 29.3% (25.2% to 33.4%) | 29% | 36 | 135 calls |
| Deal-in rate after calling | 9.6% | 10.9% (7.9% to 13.9%) | 34% | 67 | 135 calls |
| Metric | Actual | Percentile | Count |
|---|---|---|---|
| Starting hand (shanten) | +0.03 | 94 | 488 hands |
| Dora and red fives dealt | -0.06 | 1 | 488 hands |
| Draw luck | +0.3% | 84 | 5,624 draws |
| Ura-dora luck | -0.16 | 1 | 58 riichi wins |
| Ippatsu rate | +6.1% | 96 | 58 riichi wins |
| Not being chased (/first riichi) | -1.8% | 28 | 85 first riichi |
| Painful dealer tsumo rate | 10.1% | 96 | 148 tsumo against |
| Points from luck (/game) | -1.0 | 32 | 42 games |
By seasonRegular Season
2026-27 (3 games · skill estimate -0.1pt/game)
Style
Where the points came from
As a table
| Hand result | Hands | Total | Per game |
|---|---|---|---|
| Own wins | 8 | +178.9 | +59.6 |
| Deal-ins | 6 | -121.7 | -40.6 |
| Others' tsumo | 12 | -90.5 | -30.2 |
| Ron between others | 8 | -0.7 | -0.2 |
| Draws | 5 | +5.6 | +1.9 |
Luck
Every number for 2026-27
| Metric | Actual | Estimate (90% interval) | Weight of the record | Percentile | Count |
|---|---|---|---|---|---|
| Average placement | 2.67 | 2.50 (2.35 to 2.65) | 1% | — | 3 games |
| Points per game | -9.4 | -0.1 (-6.6 to 6.5) | 1% | — | 3 games |
| Points per game, luck removed | -8.5 | -0.1 (-6.5 to 6.4) | 1% | — | 3 games |
| 1st-place rate | 33.3% | 25.1% (22.6% to 27.6%) | 0% | — | 3 games |
| 4th-place rate | 33.3% | 25.0% (16.7% to 33.4%) | 1% | — | 3 games |
| Metric | Actual | Estimate (90% interval) | Weight of the record | Percentile | Count |
|---|---|---|---|---|---|
| Win rate | 20.5% | 20.0% (16.8% to 23.3%) | 4% | — | 39 hands |
| Deal-in rate | 15.4% | 11.1% (8.5% to 13.7%) | 4% | — | 39 hands |
| Riichi rate | 15.4% | 22.3% (18.0% to 26.6%) | 6% | — | 39 hands |
| Call rate | 28.2% | 24.9% (17.4% to 32.4%) | 38% | — | 39 hands |
| First riichi rate | 83.3% | 76.2% (69.9% to 82.5%) | 2% | — | 6 riichi |
| Average riichi turn | 9.83 | 9.36 (8.82 to 9.89) | 2% | — | 6 riichi |
| Average win value | 6,600 | 6,613 (5,860 to 7,366) | 3% | — | 8 wins |
| Average deal-in value | 7,200 | 5,673 (5,042 to 6,304) | 2% | — | 6 deal-ins |
| Win efficiency | 1,451 | 1,480 (1,448 to 1,513) | 0% | — | 39 hands |
| Deal-in loss | 1,131 | 650 (511 to 789) | 2% | — | 39 hands |
| Net efficiency | 321 | 833 (596 to 1,070) | 1% | — | 39 hands |
| Push rate vs riichi (1-shanten) | 50.0% | 40.8% (29.5% to 52.1%) | 1% | — | 2 hands facing riichi |
| Push rate vs riichi (2+ shanten) | 20.0% | 25.1% (15.0% to 35.2%) | 9% | — | 10 hands facing riichi |
| Tenpai rate after the first call | 27.3% | 26.0% (14.1% to 37.9%) | 16% | — | 11 first calls |
| Average win turn | 11.44 | 12.38 (12.04 to 12.71) | 1% | — | 8 wins |
| Tenpai rate at draws | 60.0% | 40.5% (31.1% to 49.9%) | 2% | — | 5 draws |
| Staying in vs riichi | 6.3% | 14.0% (12.3% to 15.7%) | 0% | — | 16 hands facing riichi |
| Efficiency match rate | 71.1% | 72.2% (68.6% to 75.9%) | 34% | — | 173 discards |
| Average ukeire loss (tiles) | 1.22 | 1.10 (0.88 to 1.32) | 22% | — | 165 discards |
| Breaking shape for value | 3.5% | 2.2% (1.3% to 3.1%) | 14% | — | 173 discards |
| Tenpai turn (luck-adjusted) | 8.76 | 8.18 (8.01 to 8.35) | 0% | — | 5 tenpai hands |
| Immediate riichi rate | 73.2% | 71.4% (59.4% to 83.4%) | 5% | — | 5 tenpai hands |
| Dama rate | 12.5% | 13.4% (3.5% to 23.3%) | 12% | — | 8 wins |
| Riichi income | 383 | 2,605 (1,559 to 3,651) | 2% | — | 6 riichi |
| Riichi win rate | 16.7% | 45.3% (35.6% to 55.0%) | 3% | — | 6 riichi |
| Riichi deal-in rate A | 0.0% | 14.3% (13.8% to 14.9%) | 0% | — | 6 riichi |
| Riichi deal-in rate B | 0.0% | 11.0% (9.3% to 12.7%) | 0% | — | 6 riichi |
| Riichi good-wait rate | 50.0% | 49.8% (41.0% to 58.6%) | 2% | — | 6 riichi |
| Riichi draw rate | 16.7% | 19.1% (11.8% to 26.4%) | 3% | — | 6 riichi |
| Call income | 2,318 | 506 (64.31 to 948) | 1% | — | 11 calls |
| Win rate after calling | 54.5% | 30.6% (23.8% to 37.4%) | 3% | — | 11 calls |
| Deal-in rate after calling | 9.1% | 11.5% (6.3% to 16.6%) | 4% | — | 11 calls |
| Metric | Actual | Percentile | Count |
|---|---|---|---|
| Starting hand (shanten) | -0.02 | — | 39 hands |
| Dora and red fives dealt | +0.12 | — | 39 hands |
| Draw luck | +0.9% | — | 443 draws |
| Ura-dora luck | +2.46 | — | 1 riichi wins |
| Ippatsu rate | -19.7% | — | 1 riichi wins |
| Not being chased (/first riichi) | -34.7% | — | 5 first riichi |
| Painful dealer tsumo rate | 8.3% | — | 12 tsumo against |
| Points from luck (/game) | -0.9 | — | 3 games |
| Category | Frequency | Balance per hand | League average | Difference |
|---|---|---|---|---|
| Wins with riichi | 2.6% | +374 | +924 | -549 |
| Wins with calls | 15.4% | +856 | +381 | +475 |
| Dama wins | 2.6% | +221 | +175 | +45 |
| Deal-ins to riichi | 5.1% | -362 | -361 | -1 |
| Deal-ins to open hands | 7.7% | -462 | -203 | -259 |
| Deal-ins to dama | 2.6% | -308 | -102 | -206 |
| Others' tsumo | 30.8% | -941 | -757 | -184 |
| Other (draws etc.) | 33.3% | +26 | -59 | +85 |
| Total (per hand) | -595 |
2025-26 (39 games · skill estimate 0.4pt/game)
Style
Where the points came from
As a table
| Hand result | Hands | Total | Per game |
|---|---|---|---|
| Own wins | 96 | +1723.0 | +44.2 |
| Deal-ins | 41 | -534.9 | -13.7 |
| Others' tsumo | 136 | -970.9 | -24.9 |
| Ron between others | 117 | -36.0 | -0.9 |
| Draws | 59 | -23.5 | -0.6 |
Luck
Every number for 2025-26
| Metric | Actual | Estimate (90% interval) | Weight of the record | Percentile | Count |
|---|---|---|---|---|---|
| Average placement | 2.38 | 2.49 (2.37 to 2.61) | 7% | 70 | 39 games |
| Points per game | 4.1 | 0.4 (-4.9 to 5.7) | 9% | 75 | 39 games |
| Points per game, luck removed | 5.1 | 0.6 (-4.4 to 5.6) | 12% | 82 | 39 games |
| 1st-place rate | 33.3% | 25.3% (22.2% to 28.3%) | 3% | 90 | 39 games |
| 4th-place rate | 23.1% | 24.6% (18.5% to 30.8%) | 15% | 62 | 39 games |
| Metric | Actual | Estimate (90% interval) | Weight of the record | Percentile | Count |
|---|---|---|---|---|---|
| Win rate | 21.4% | 20.4% (18.4% to 22.4%) | 29% | 62 | 449 hands |
| Deal-in rate | 9.1% | 10.4% (8.8% to 11.9%) | 30% | 92 | 449 hands |
| Riichi rate | 23.8% | 23.2% (20.9% to 25.5%) | 43% | 67 | 449 hands |
| Call rate | 27.6% | 27.0% (24.0% to 30.1%) | 88% | 77 | 449 hands |
| First riichi rate | 74.8% | 75.7% (71.7% to 79.8%) | 23% | 47 | 107 riichi |
| Average riichi turn | 9.13 | 9.29 (8.96 to 9.61) | 27% | 57 | 107 riichi |
| Average win value | 5,819 | 6,403 (5,927 to 6,880) | 26% | 9 | 96 wins |
| Average deal-in value | 5,076 | 5,577 (5,072 to 6,083) | 12% | 72 | 41 deal-ins |
| Win efficiency | 1,382 | 1,480 (1,425 to 1,536) | 0% | 50 | 449 hands |
| Deal-in loss | 471 | 611 (511 to 710) | 18% | 87 | 449 hands |
| Net efficiency | 911 | 849 (669 to 1,029) | 13% | 57 | 449 hands |
| Push rate vs riichi (1-shanten) | 35.6% | 39.0% (32.9% to 45.2%) | 32% | 16 | 73 hands facing riichi |
| Push rate vs riichi (2+ shanten) | 28.9% | 27.1% (21.5% to 32.6%) | 44% | 64 | 83 hands facing riichi |
| Tenpai rate after the first call | 22.6% | 23.6% (18.2% to 28.9%) | 68% | 52 | 124 first calls |
| Average win turn | 11.71 | 12.32 (12.05 to 12.58) | 10% | 97 | 96 wins |
| Tenpai rate at draws | 35.6% | 39.0% (32.7% to 45.3%) | 22% | 24 | 59 draws |
| Staying in vs riichi | 12.0% | 13.9% (12.5% to 15.3%) | 6% | 19 | 233 hands facing riichi |
| Efficiency match rate | 76.4% | 76.0% (74.6% to 77.4%) | 88% | 77 | 2,424 discards |
| Average ukeire loss (tiles) | 0.89 | 0.92 (0.84 to 1.01) | 80% | 24 | 2,326 discards |
| Breaking shape for value | 1.2% | 1.5% (1.1% to 1.8%) | 69% | 4 | 2,424 discards |
| Tenpai turn (luck-adjusted) | 8.02 | 8.16 (8.03 to 8.30) | 7% | 34 | 95 tenpai hands |
| Immediate riichi rate | 73.4% | 72.4% (66.8% to 78.0%) | 50% | 49 | 95 tenpai hands |
| Dama rate | 7.3% | 9.7% (5.1% to 14.2%) | 62% | 21 | 96 wins |
| Riichi income | 2,998 | 2,720 (2,036 to 3,404) | 22% | 72 | 107 riichi |
| Riichi win rate | 53.3% | 48.7% (43.4% to 54.0%) | 36% | 95 | 107 riichi |
| Riichi deal-in rate A | 10.3% | 14.3% (13.1% to 15.4%) | 1% | 92 | 107 riichi |
| Riichi deal-in rate B | 9.3% | 11.0% (9.3% to 12.7%) | 5% | 75 | 107 riichi |
| Riichi good-wait rate | 57.9% | 52.3% (47.2% to 57.4%) | 30% | 87 | 107 riichi |
| Riichi draw rate | 13.1% | 17.2% (13.0% to 21.3%) | 33% | 6 | 107 riichi |
| Call income | -383 | 383 (38.57 to 728) | 12% | 1 | 124 calls |
| Win rate after calling | 25.8% | 28.7% (24.4% to 33.0%) | 27% | 19 | 124 calls |
| Deal-in rate after calling | 9.7% | 11.0% (7.9% to 14.0%) | 32% | 77 | 124 calls |
| Metric | Actual | Percentile | Count |
|---|---|---|---|
| Starting hand (shanten) | +0.03 | 80 | 449 hands |
| Dora and red fives dealt | -0.07 | 9 | 449 hands |
| Draw luck | +0.3% | 49 | 5,181 draws |
| Ura-dora luck | -0.20 | 6 | 57 riichi wins |
| Ippatsu rate | +6.6% | 85 | 57 riichi wins |
| Not being chased (/first riichi) | +0.3% | 62 | 80 first riichi |
| Painful dealer tsumo rate | 10.3% | 80 | 136 tsumo against |
| Points from luck (/game) | -1.0 | 42 | 39 games |
| Category | Frequency | Balance per hand | League average | Difference |
|---|---|---|---|---|
| Wins with riichi | 12.7% | +991 | +924 | +67 |
| Wins with calls | 7.1% | +288 | +381 | -94 |
| Dama wins | 1.6% | +103 | +175 | -72 |
| Deal-ins to riichi | 3.8% | -251 | -361 | +110 |
| Deal-ins to open hands | 4.0% | -141 | -203 | +62 |
| Deal-ins to dama | 1.3% | -102 | -102 | +0 |
| Others' tsumo | 30.3% | -807 | -757 | -50 |
| Other (draws etc.) | 39.2% | -69 | -59 | -10 |
| Total (per hand) | +13 |
Players with a similar styleclosest career style metrics first
- Asami MakiAkasaka DrivensIn common: Efficiency first, Dama rarely, Calls a lot
- Uchikawa KotaroEX FurinkazanIn common: Efficiency first, Smaller hands
- Nakabayashi KeiU-NEXT PiratesIn common: Efficiency first, Calls a lot
* Twelve style metrics, including call rate, riichi rate, win rate, deal-in rate, hand value, riichi speed and immediate riichi rate, are put on the same scale and compared; the players closest overall are listed. Metrics the data can vouch for weigh more. It shows only how close the styles are, not which is better. The differences are often slight, and the order could change.