Player · 55 career games · 2025-26–2026-27
Kazuma Ishii
Too little data yet to pin down the style. Career record: -0.6pt per game, close to average.
Actual / game
-0.6
55 career games
Skill estimate / game
-0.2
90% interval -6.5 to +6.2
Estimate, luck removed
+0.4
adjusted for starting hands, draws, ura-dora
Weight of the record
29%
share of the estimate from the record
Styleleague percentile, career
Color only for metrics with a good side (red = good, blue = bad). Metrics of style, such as riichi rate, call rate and tile efficiency match rate, are gray. For tenpai turn, further right means later (a larger turn number). Values are estimates.
Placements55 career games, average placement 2.49
- 1st29.1%16×
- 2nd20.0%11×
- 3rd23.6%13×
- 4th27.3%15×
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 | 130 | +2360.5 | +42.9 |
| Deal-ins | 69 | -964.8 | -17.5 |
| Others' tsumo | 189 | -1315.7 | -23.9 |
| Ron between others | 159 | -64.0 | -1.2 |
| Exhaustive draws | 110 | -41.6 | -0.8 |
Hand balance breakdownpoints won or lost per hand, all stages
| Category | Frequency | Balance per hand | League average | Difference |
|---|---|---|---|---|
| Wins with riichi | 11.3% | +913 | +919 | -6 |
| Wins with calls | 7.0% | +291 | +382 | -92 |
| Dama wins | 1.5% | +99 | +173 | -74 |
| Deal-ins to riichi | 4.4% | -300 | -360 | +60 |
| Deal-ins to open hands | 4.9% | -197 | -203 | +6 |
| Deal-ins to dama | 1.2% | -91 | -101 | +10 |
| Others' tsumo | 28.8% | -763 | -752 | -10 |
| Other (exhaustive draws, etc.) | 40.9% | -83 | -60 | -23 |
| Total (per hand) | -132 |
Every career number (estimate, 90% interval, weight of the record)
| Metric | Actual | Estimate (90% interval) | Weight of the record | Percentile | Count |
|---|---|---|---|---|---|
| Average placement | 2.49 | 2.50 (2.34 to 2.65) | 27% | 56 | 55 games |
| Points per game | -0.6 | -0.2 (-6.5 to 6.2) | 29% | 52 | 55 games |
| Points per game, luck removed | 1.0 | 0.4 (-5.3 to 6.0) | 36% | 54 | 55 games |
| 1st-place rate | 29.1% | 26.3% (20.1% to 32.5%) | 30% | 70 | 55 games |
| 4th-place rate | 27.3% | 25.6% (19.4% to 31.9%) | 31% | 35 | 55 games |
| Metric | Actual | Estimate (90% interval) | Weight of the record | Percentile | Count |
|---|---|---|---|---|---|
| Win rate | 19.8% | 19.9% (18.1% to 21.7%) | 45% | 47 | 657 hands |
| Deal-in rate | 10.5% | 10.7% (9.4% to 12.1%) | 41% | 62 | 657 hands |
| Riichi rate | 23.4% | 23.1% (21.1% to 25.0%) | 47% | 62 | 657 hands |
| Call rate | 26.0% | 25.7% (23.2% to 28.3%) | 91% | 70 | 657 hands |
| First riichi rate | 76.6% | 76.2% (72.6% to 79.7%) | 25% | 58 | 154 riichi |
| Average riichi turn | 9.00 | 9.18 (8.87 to 9.48) | 48% | 86 | 154 riichi |
| Average win value | 5,835 | 6,330 (5,899 to 6,762) | 34% | 9 | 130 wins |
| Average deal-in value | 5,299 | 5,564 (5,110 to 6,018) | 19% | 74 | 69 deal-ins |
| Win efficiency | 1,303 | 1,462 (1,367 to 1,557) | 7% | 17 | 657 hands |
| Deal-in loss | 569 | 623 (536 to 710) | 22% | 74 | 657 hands |
| Net efficiency | 734 | 810 (633 to 987) | 25% | 33 | 657 hands |
| Push rate vs riichi (1-shanten) | 35.6% | 39.0% (33.6% to 44.3%) | 36% | 21 | 101 hands facing riichi |
| Push rate vs riichi (2+ shanten) | 27.8% | 26.8% (21.9% to 31.8%) | 58% | 58 | 126 hands facing riichi |
| Tenpai rate after the first call | 21.1% | 22.3% (17.6% to 27.0%) | 73% | 17 | 171 first calls |
| Average win turn | 11.96 | 12.37 (12.23 to 12.51) | 3% | 82 | 130 wins |
| Tenpai rate at exhaustive draws | 36.4% | 38.6% (33.4% to 43.8%) | 38% | 29 | 110 exhaustive draws |
| Staying in vs riichi | 11.9% | 13.8% (12.1% to 15.4%) | 14% | 23 | 328 hands facing an opponent’s riichi |
| Tile efficiency match rate | 75.0% | 74.8% (73.6% to 76.0%) | 91% | 78 | 3,494 discards |
| Average ukeire loss (tiles) | 0.99 | 1.00 (0.93 to 1.08) | 85% | 31 | 3,350 discards |
| Breaking shape for value | 1.9% | 1.9% (1.6% to 2.3%) | 79% | 35 | 3,494 discards |
| Tenpai turn (luck-adjusted) | 7.88 | 8.15 (8.03 to 8.26) | 8% | 17 | 136 tenpai hands |
| Immediate riichi rate | 74.7% | 73.3% (68.5% to 78.1%) | 55% | 70 | 136 tenpai hands |
| Dama rate | 7.7% | 9.5% (5.5% to 13.6%) | 68% | 17 | 130 wins |
| Riichi income | 2,673 | 2,638 (2,033 to 3,242) | 29% | 45 | 154 riichi |
| Riichi win rate | 48.1% | 47.0% (42.2% to 51.7%) | 47% | 72 | 154 riichi |
| Riichi deal-in rate A | 11.0% | 14.1% (12.4% to 15.9%) | 6% | 78 | 154 riichi |
| Riichi deal-in rate B | 8.4% | 10.7% (8.5% to 12.9%) | 14% | 82 | 154 riichi |
| Riichi good-wait rate | 59.1% | 52.9% (48.5% to 57.3%) | 34% | 98 | 154 riichi |
| Riichi exhaustive draw rate | 16.9% | 18.3% (14.8% to 21.9%) | 39% | 31 | 154 riichi |
| Call income | -246 | 323 (-31.14 to 677) | 22% | 3 | 171 calls |
| Win rate after calling | 26.9% | 28.6% (24.7% to 32.6%) | 40% | 25 | 171 calls |
| Deal-in rate after calling | 9.9% | 10.9% (8.1% to 13.6%) | 40% | 74 | 171 calls |
| Metric | Actual | Percentile | Count |
|---|---|---|---|
| Starting hand (shanten) | +0.03 | 100 | 657 hands |
| Dora and red fives dealt | -0.05 | 3 | 657 hands |
| Draw luck | +0.1% | 66 | 7,731 tile draws |
| Ura-dora luck | -0.19 | 1 | 74 riichi wins |
| Ippatsu rate | +5.9% | 98 | 74 riichi wins |
| Avoiding a chase riichi (/first riichi) | -5.2% | 3 | 118 first riichi |
| Mangan+ tsumo against dealer rate | 9.5% | 97 | 189 tsumo against |
| Points from luck (/game) | -1.5 | 25 | 55 games |
By seasonRegular Season
2026-27 (16 games · skill estimate -1.3pt/game)
Style
Where the points came from
As a table
| Hand result | Hands | Total | Per game |
|---|---|---|---|
| Own wins | 34 | +652.4 | +40.8 |
| Deal-ins | 28 | -428.8 | -26.8 |
| Others' tsumo | 53 | -372.4 | -23.3 |
| Ron between others | 42 | -19.3 | -1.2 |
| Exhaustive draws | 51 | -21.2 | -1.3 |
Luck
Every number for 2026-27
| Metric | Actual | Estimate (90% interval) | Weight of the record | Percentile | Count |
|---|---|---|---|---|---|
| Average placement | 2.75 | 2.52 (2.31 to 2.74) | 10% | 12 | 16 games |
| Points per game | -11.9 | -1.3 (-10.1 to 7.6) | 11% | 9 | 16 games |
| Points per game, luck removed | -9.0 | -1.3 (-9.6 to 7.0) | 14% | 14 | 16 games |
| 1st-place rate | 18.8% | 24.4% (15.7% to 33.0%) | 11% | 44 | 16 games |
| 4th-place rate | 37.5% | 26.4% (17.5% to 35.2%) | 12% | 8 | 16 games |
| Metric | Actual | Estimate (90% interval) | Weight of the record | Percentile | Count |
|---|---|---|---|---|---|
| Win rate | 16.3% | 19.2% (16.5% to 21.9%) | 21% | 12 | 208 hands |
| Deal-in rate | 13.5% | 11.4% (9.4% to 13.4%) | 18% | 14 | 208 hands |
| Riichi rate | 22.6% | 22.7% (19.8% to 25.6%) | 22% | 44 | 208 hands |
| Call rate | 22.6% | 22.7% (18.5% to 26.9%) | 76% | 30 | 208 hands |
| First riichi rate | 80.9% | 76.5% (71.7% to 81.2%) | 9% | 84 | 47 riichi |
| Average riichi turn | 8.70 | 9.20 (8.73 to 9.66) | 22% | 81 | 47 riichi |
| Average win value | 5,879 | 6,504 (5,864 to 7,145) | 12% | 25 | 34 wins |
| Average deal-in value | 5,625 | 5,626 (5,075 to 6,177) | 9% | 38 | 28 deal-ins |
| Win efficiency | 1,132 | 1,466 (1,359 to 1,573) | 2% | 9 | 208 hands |
| Deal-in loss | 779 | 650 (538 to 763) | 8% | 12 | 208 hands |
| Net efficiency | 353 | 790 (555 to 1,024) | 9% | 4 | 208 hands |
| Push rate vs riichi (1-shanten) | 35.7% | 40.2% (32.2% to 48.1%) | 13% | 17 | 28 hands facing riichi |
| Push rate vs riichi (2+ shanten) | 25.6% | 25.6% (18.4% to 32.7%) | 32% | 52 | 43 hands facing riichi |
| Tenpai rate after the first call | 17.0% | 21.9% (14.6% to 29.2%) | 43% | 17 | 47 first calls |
| Average win turn | 12.66 | 12.38 (12.23 to 12.53) | 1% | 25 | 34 wins |
| Tenpai rate at exhaustive draws | 37.3% | 39.4% (32.6% to 46.2%) | 22% | 28 | 51 exhaustive draws |
| Staying in vs riichi | 11.6% | 14.0% (11.9% to 16.0%) | 4% | 20 | 95 hands facing an opponent’s riichi |
| Tile efficiency match rate | 71.9% | 72.1% (70.2% to 74.1%) | 76% | 30 | 1,070 discards |
| Average ukeire loss (tiles) | 1.23 | 1.17 (1.05 to 1.28) | 63% | 95 | 1,024 discards |
| Breaking shape for value | 3.6% | 2.8% (2.3% to 3.4%) | 53% | 97 | 1,070 discards |
| Tenpai turn (luck-adjusted) | 7.55 | 8.15 (8.02 to 8.29) | 2% | 6 | 41 tenpai hands |
| Immediate riichi rate | 77.0% | 73.1% (65.8% to 80.3%) | 27% | 81 | 41 tenpai hands |
| Dama rate | 8.8% | 11.7% (5.4% to 18.1%) | 36% | 63 | 34 wins |
| Riichi income | 1,934 | 2,546 (1,708 to 3,383) | 11% | 36 | 47 riichi |
| Riichi win rate | 36.2% | 43.9% (36.8% to 51.0%) | 21% | 14 | 47 riichi |
| Riichi deal-in rate A | 12.8% | 14.3% (12.4% to 16.2%) | 2% | 71 | 47 riichi |
| Riichi deal-in rate B | 6.4% | 10.8% (8.1% to 13.5%) | 5% | 87 | 47 riichi |
| Riichi good-wait rate | 61.7% | 51.4% (45.1% to 57.6%) | 14% | 97 | 47 riichi |
| Riichi exhaustive draw rate | 25.5% | 20.3% (15.1% to 25.5%) | 16% | 79 | 47 riichi |
| Call income | 117 | 459 (-9.39 to 928) | 7% | 36 | 47 calls |
| Win rate after calling | 29.8% | 29.8% (23.8% to 35.8%) | 16% | 57 | 47 calls |
| Deal-in rate after calling | 10.6% | 11.4% (7.2% to 15.5%) | 15% | 52 | 47 calls |
| Metric | Actual | Percentile | Count |
|---|---|---|---|
| Starting hand (shanten) | +0.03 | 68 | 208 hands |
| Dora and red fives dealt | +0.02 | 65 | 208 hands |
| Draw luck | -0.2% | 38 | 2,550 tile draws |
| Ura-dora luck | -0.14 | 14 | 17 riichi wins |
| Ippatsu rate | +3.8% | 69 | 17 riichi wins |
| Avoiding a chase riichi (/first riichi) | -16.8% | 1 | 38 first riichi |
| Mangan+ tsumo against dealer rate | 7.5% | 81 | 53 tsumo against |
| Points from luck (/game) | -2.9 | 36 | 16 games |
| Category | Frequency | Balance per hand | League average | Difference |
|---|---|---|---|---|
| Wins with riichi | 8.2% | +744 | +919 | -175 |
| Wins with calls | 6.7% | +297 | +382 | -86 |
| Dama wins | 1.4% | +91 | +173 | -82 |
| Deal-ins to riichi | 5.8% | -408 | -360 | -48 |
| Deal-ins to open hands | 6.7% | -319 | -203 | -116 |
| Deal-ins to dama | 1.0% | -67 | -101 | +34 |
| Others' tsumo | 25.5% | -668 | -752 | +84 |
| Other (exhaustive draws, etc.) | 44.7% | -113 | -60 | -53 |
| Total (per hand) | -443 |
2025-26 (39 games · skill estimate 0.9pt/game)
Style
Where the points came from
As a table
| Hand result | Hands | Total | Per game |
|---|---|---|---|
| Own wins | 96 | +1708.0 | +43.8 |
| Deal-ins | 41 | -536.1 | -13.7 |
| Others' tsumo | 136 | -943.3 | -24.2 |
| Ron between others | 117 | -44.7 | -1.1 |
| Exhaustive draws | 59 | -20.4 | -0.5 |
Luck
Every number for 2025-26
| Metric | Actual | Estimate (90% interval) | Weight of the record | Percentile | Count |
|---|---|---|---|---|---|
| Average placement | 2.38 | 2.47 (2.30 to 2.65) | 21% | 70 | 39 games |
| Points per game | 4.1 | 0.9 (-6.2 to 8.1) | 22% | 75 | 39 games |
| Points per game, luck removed | 5.1 | 1.5 (-5.0 to 7.9) | 28% | 82 | 39 games |
| 1st-place rate | 33.3% | 27.0% (20.0% to 33.9%) | 23% | 90 | 39 games |
| 4th-place rate | 23.1% | 24.5% (17.4% to 31.5%) | 24% | 62 | 39 games |
| Metric | Actual | Estimate (90% interval) | Weight of the record | Percentile | Count |
|---|---|---|---|---|---|
| Win rate | 21.4% | 20.5% (18.4% to 22.6%) | 36% | 62 | 449 hands |
| Deal-in rate | 9.1% | 10.3% (8.8% to 11.9%) | 32% | 92 | 449 hands |
| Riichi rate | 23.8% | 23.2% (21.0% to 25.4%) | 38% | 67 | 449 hands |
| Call rate | 27.6% | 27.0% (24.0% to 30.1%) | 87% | 77 | 449 hands |
| First riichi rate | 74.8% | 75.8% (71.8% to 79.7%) | 19% | 47 | 107 riichi |
| Average riichi turn | 9.13 | 9.26 (8.91 to 9.61) | 39% | 57 | 107 riichi |
| Average win value | 5,819 | 6,375 (5,893 to 6,856) | 28% | 9 | 96 wins |
| Average deal-in value | 5,076 | 5,559 (5,044 to 6,073) | 12% | 72 | 41 deal-ins |
| Win efficiency | 1,382 | 1,470 (1,370 to 1,569) | 5% | 29 | 449 hands |
| Deal-in loss | 471 | 611 (515 to 708) | 16% | 87 | 449 hands |
| Net efficiency | 911 | 849 (651 to 1,047) | 18% | 57 | 449 hands |
| Push rate vs riichi (1-shanten) | 35.6% | 39.3% (33.3% to 45.4%) | 29% | 16 | 73 hands facing riichi |
| Push rate vs riichi (2+ shanten) | 28.9% | 27.2% (21.5% to 32.8%) | 48% | 64 | 83 hands facing riichi |
| Tenpai rate after the first call | 22.6% | 23.6% (18.3% to 28.9%) | 67% | 52 | 124 first calls |
| Average win turn | 11.71 | 12.36 (12.22 to 12.51) | 2% | 97 | 96 wins |
| Tenpai rate at exhaustive draws | 35.6% | 38.9% (32.5% to 45.4%) | 25% | 24 | 59 exhaustive draws |
| Staying in vs riichi | 12.0% | 13.9% (12.1% to 15.6%) | 10% | 19 | 233 hands facing an opponent’s riichi |
| Tile 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% | 1.4% (1.0% to 1.8%) | 72% | 4 | 2,424 discards |
| Tenpai turn (luck-adjusted) | 8.02 | 8.16 (8.04 to 8.28) | 5% | 34 | 95 tenpai hands |
| Immediate riichi rate | 73.7% | 72.6% (67.2% to 78.0%) | 46% | 49 | 95 tenpai hands |
| Dama rate | 7.3% | 9.7% (5.2% to 14.2%) | 61% | 21 | 96 wins |
| Riichi income | 2,998 | 2,707 (2,024 to 3,390) | 22% | 72 | 107 riichi |
| Riichi win rate | 53.3% | 48.8% (43.4% to 54.1%) | 38% | 95 | 107 riichi |
| Riichi deal-in rate A | 10.3% | 14.2% (12.3% to 16.0%) | 4% | 92 | 107 riichi |
| Riichi deal-in rate B | 9.3% | 10.9% (8.5% to 13.2%) | 10% | 75 | 107 riichi |
| Riichi good-wait rate | 57.9% | 51.9% (46.9% to 56.9%) | 26% | 90 | 107 riichi |
| Riichi exhaustive draw rate | 13.1% | 17.4% (13.3% to 21.4%) | 31% | 6 | 107 riichi |
| Call income | -383 | 337 (-51.36 to 725) | 17% | 1 | 124 calls |
| Win rate after calling | 25.8% | 28.5% (24.1% to 32.9%) | 33% | 19 | 124 calls |
| Deal-in rate after calling | 9.7% | 10.9% (7.8% to 14.0%) | 33% | 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 tile draws |
| Ura-dora luck | -0.20 | 6 | 57 riichi wins |
| Ippatsu rate | +6.6% | 85 | 57 riichi wins |
| Avoiding a chase riichi (/first riichi) | +0.4% | 62 | 80 first riichi |
| Mangan+ tsumo against dealer 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 | +919 | +72 |
| Wins with calls | 7.1% | +288 | +382 | -95 |
| Dama wins | 1.6% | +103 | +173 | -70 |
| Deal-ins to riichi | 3.8% | -251 | -360 | +109 |
| Deal-ins to open hands | 4.0% | -141 | -203 | +62 |
| Deal-ins to dama | 1.3% | -102 | -101 | -1 |
| Others' tsumo | 30.3% | -807 | -752 | -54 |
| Other (exhaustive draws, etc.) | 39.2% | -69 | -60 | -9 |
| Total (per hand) | +13 |
Players with a similar styleclosest career style metrics first
- Kotaro UchikawaEX FurinkazanIn common: Smaller hands, Efficiency first, Early riichi
- Takaki AsaiFormer M.League player
- Sayaka OkadaKADOKAWA Sakura KnightsIn common: Efficiency first, Dama rarely
* 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 supported more strongly by the data receive more weight. The comparison shows how similar the players' styles are, not which is better. Differences are often small, so the order may change.