Player · 54 career games · 2025-26–2026-27
Kosuke Nagai
In style, stands out for rare dama. Career record: +3.6pt per game, but allowing for luck the difference from average is not clear yet.
Actual / game
+3.6
54 career games
Skill estimate / game
+1.0
90% interval -5.4 to +7.4
Estimate, luck removed
+1.0
adjusted for starting hands, draws, ura-dora
Weight of the record
28%
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.
Placements54 career games, average placement 2.41
- 1st31.5%17×
- 2nd18.5%10×
- 3rd27.8%15×
- 4th22.2%12×
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 | 131 | +2657.1 | +49.2 |
| Deal-ins | 77 | -1082.8 | -20.1 |
| Others' tsumo | 188 | -1290.4 | -23.9 |
| Ron between others | 166 | -101.4 | -1.9 |
| Exhaustive draws | 129 | +22.8 | +0.4 |
Hand balance breakdownpoints won or lost per hand, all stages
| Category | Frequency | Balance per hand | League average | Difference |
|---|---|---|---|---|
| Wins with riichi | 10.9% | +954 | +919 | +35 |
| Wins with calls | 6.9% | +416 | +382 | +34 |
| Dama wins | 1.2% | +73 | +173 | -100 |
| Deal-ins to riichi | 4.6% | -383 | -360 | -23 |
| Deal-ins to open hands | 5.4% | -208 | -203 | -5 |
| Deal-ins to dama | 1.2% | -39 | -101 | +62 |
| Others' tsumo | 27.2% | -767 | -752 | -14 |
| Other (exhaustive draws, etc.) | 42.7% | -9 | -60 | +50 |
| Total (per hand) | +38 |
Every career number (estimate, 90% interval, weight of the record)
| Metric | Actual | Estimate (90% interval) | Weight of the record | Percentile | Count |
|---|---|---|---|---|---|
| Average placement | 2.41 | 2.47 (2.32 to 2.63) | 27% | 68 | 54 games |
| Points per game | 3.6 | 1.0 (-5.4 to 7.4) | 28% | 68 | 54 games |
| Points per game, luck removed | 2.7 | 1.0 (-4.7 to 6.7) | 35% | 70 | 54 games |
| 1st-place rate | 31.5% | 27.0% (20.7% to 33.2%) | 30% | 84 | 54 games |
| 4th-place rate | 22.2% | 24.1% (17.8% to 30.3%) | 31% | 68 | 54 games |
| Metric | Actual | Estimate (90% interval) | Weight of the record | Percentile | Count |
|---|---|---|---|---|---|
| Win rate | 19.0% | 19.5% (17.7% to 21.3%) | 47% | 35 | 691 hands |
| Deal-in rate | 11.1% | 11.0% (9.7% to 12.4%) | 42% | 41 | 691 hands |
| Riichi rate | 25.9% | 24.3% (22.4% to 26.2%) | 48% | 92 | 691 hands |
| Call rate | 20.4% | 20.6% (18.1% to 23.1%) | 91% | 27 | 691 hands |
| First riichi rate | 77.7% | 76.5% (73.1% to 79.8%) | 28% | 76 | 179 riichi |
| Average riichi turn | 9.18 | 9.26 (8.96 to 9.55) | 51% | 68 | 179 riichi |
| Average win value | 6,815 | 6,668 (6,237 to 7,098) | 35% | 66 | 131 wins |
| Average deal-in value | 5,183 | 5,534 (5,094 to 5,974) | 21% | 78 | 77 deal-ins |
| Win efficiency | 1,444 | 1,472 (1,377 to 1,567) | 7% | 43 | 691 hands |
| Deal-in loss | 601 | 630 (544 to 716) | 23% | 64 | 691 hands |
| Net efficiency | 843 | 837 (664 to 1,011) | 26% | 49 | 691 hands |
| Push rate vs riichi (1-shanten) | 47.2% | 43.4% (38.4% to 48.4%) | 40% | 86 | 123 hands facing riichi |
| Push rate vs riichi (2+ shanten) | 23.3% | 24.2% (19.4% to 28.9%) | 62% | 33 | 146 hands facing riichi |
| Tenpai rate after the first call | 29.1% | 28.0% (23.0% to 33.1%) | 70% | 68 | 141 first calls |
| Average win turn | 12.70 | 12.39 (12.25 to 12.53) | 3% | 25 | 131 wins |
| Tenpai rate at exhaustive draws | 48.8% | 43.7% (38.8% to 48.6%) | 42% | 92 | 129 exhaustive draws |
| Staying in vs riichi | 13.1% | 13.9% (12.3% to 15.6%) | 15% | 43 | 351 hands facing an opponent’s riichi |
| Tile efficiency match rate | 71.8% | 71.9% (70.7% to 73.0%) | 92% | 29 | 3,648 discards |
| Average ukeire loss (tiles) | 1.19 | 1.17 (1.10 to 1.25) | 85% | 90 | 3,480 discards |
| Breaking shape for value | 1.6% | 1.7% (1.3% to 2.0%) | 79% | 9 | 3,648 discards |
| Tenpai turn (luck-adjusted) | 8.20 | 8.17 (8.06 to 8.29) | 9% | 62 | 157 tenpai hands |
| Immediate riichi rate | 75.7% | 74.0% (69.5% to 78.6%) | 58% | 76 | 157 tenpai hands |
| Dama rate | 6.1% | 8.4% (4.4% to 12.5%) | 68% | 7 | 131 wins |
| Riichi income | 2,261 | 2,505 (1,933 to 3,078) | 33% | 23 | 179 riichi |
| Riichi win rate | 41.9% | 43.9% (39.4% to 48.4%) | 51% | 17 | 179 riichi |
| Riichi deal-in rate A | 15.1% | 14.4% (12.7% to 16.1%) | 6% | 41 | 179 riichi |
| Riichi deal-in rate B | 11.2% | 11.1% (8.9% to 13.2%) | 16% | 45 | 179 riichi |
| Riichi good-wait rate | 44.7% | 47.9% (43.7% to 52.0%) | 37% | 21 | 179 riichi |
| Riichi exhaustive draw rate | 21.8% | 20.3% (17.0% to 23.7%) | 43% | 78 | 179 riichi |
| Call income | 992 | 583 (209 to 958) | 19% | 84 | 141 calls |
| Win rate after calling | 34.0% | 31.3% (27.1% to 35.5%) | 36% | 88 | 141 calls |
| Deal-in rate after calling | 9.2% | 10.7% (7.8% to 13.6%) | 35% | 82 | 141 calls |
| Metric | Actual | Percentile | Count |
|---|---|---|---|
| Starting hand (shanten) | +0.03 | 98 | 691 hands |
| Dora and red fives dealt | +0.03 | 94 | 691 hands |
| Draw luck | +0.4% | 90 | 8,286 tile draws |
| Ura-dora luck | -0.01 | 31 | 75 riichi wins |
| Ippatsu rate | -1.1% | 39 | 75 riichi wins |
| Avoiding a chase riichi (/first riichi) | -4.1% | 7 | 139 first riichi |
| Mangan+ tsumo against dealer rate | 10.6% | 86 | 188 tsumo against |
| Points from luck (/game) | +0.9 | 74 | 54 games |
By seasonRegular Season
2026-27 (13 games · skill estimate -1.5pt/game)
Style
Where the points came from
As a table
| Hand result | Hands | Total | Per game |
|---|---|---|---|
| Own wins | 26 | +449.6 | +34.6 |
| Deal-ins | 23 | -343.4 | -26.4 |
| Others' tsumo | 50 | -321.7 | -24.7 |
| Ron between others | 37 | -56.7 | -4.4 |
| Exhaustive draws | 35 | +43.5 | +3.3 |
Luck
Every number for 2026-27
| Metric | Actual | Estimate (90% interval) | Weight of the record | Percentile | Count |
|---|---|---|---|---|---|
| Average placement | 2.92 | 2.53 (2.31 to 2.75) | 8% | 6 | 13 games |
| Points per game | -17.6 | -1.5 (-10.7 to 7.6) | 9% | 6 | 13 games |
| Points per game, luck removed | -11.9 | -1.4 (-10.0 to 7.3) | 12% | 12 | 13 games |
| 1st-place rate | 7.7% | 23.5% (14.5% to 32.5%) | 9% | 9 | 13 games |
| 4th-place rate | 30.8% | 25.5% (16.3% to 34.6%) | 10% | 26 | 13 games |
| Metric | Actual | Estimate (90% interval) | Weight of the record | Percentile | Count |
|---|---|---|---|---|---|
| Win rate | 15.2% | 19.1% (16.3% to 22.0%) | 18% | 6 | 171 hands |
| Deal-in rate | 13.5% | 11.3% (9.2% to 13.4%) | 15% | 20 | 171 hands |
| Riichi rate | 24.0% | 23.0% (19.9% to 26.0%) | 19% | 57 | 171 hands |
| Call rate | 26.3% | 25.4% (20.9% to 29.9%) | 72% | 65 | 171 hands |
| First riichi rate | 70.7% | 75.6% (70.7% to 80.4%) | 8% | 28 | 41 riichi |
| Average riichi turn | 9.66 | 9.40 (8.92 to 9.88) | 19% | 25 | 41 riichi |
| Average win value | 5,981 | 6,532 (5,859 to 7,206) | 10% | 44 | 26 wins |
| Average deal-in value | 5,161 | 5,592 (5,025 to 6,159) | 7% | 68 | 23 deal-ins |
| Win efficiency | 1,015 | 1,465 (1,357 to 1,574) | 2% | 4 | 171 hands |
| Deal-in loss | 719 | 644 (529 to 760) | 7% | 28 | 171 hands |
| Net efficiency | 296 | 793 (551 to 1,034) | 8% | 6 | 171 hands |
| Push rate vs riichi (1-shanten) | 40.6% | 40.8% (33.1% to 48.5%) | 15% | 41 | 32 hands facing riichi |
| Push rate vs riichi (2+ shanten) | 21.6% | 24.4% (16.9% to 31.9%) | 29% | 30 | 37 hands facing riichi |
| Tenpai rate after the first call | 15.6% | 21.4% (14.0% to 28.8%) | 42% | 12 | 45 first calls |
| Average win turn | 12.49 | 12.38 (12.23 to 12.53) | 1% | 38 | 26 wins |
| Tenpai rate at exhaustive draws | 60.0% | 43.3% (35.8% to 50.8%) | 16% | 97 | 35 exhaustive draws |
| Staying in vs riichi | 12.1% | 14.0% (12.0% to 16.0%) | 4% | 30 | 91 hands facing an opponent’s riichi |
| Tile efficiency match rate | 70.9% | 71.4% (69.4% to 73.5%) | 73% | 25 | 921 discards |
| Average ukeire loss (tiles) | 1.36 | 1.24 (1.12 to 1.36) | 60% | 97 | 880 discards |
| Breaking shape for value | 1.2% | 1.6% (1.1% to 2.2%) | 49% | 12 | 921 discards |
| Tenpai turn (luck-adjusted) | 8.45 | 8.17 (8.04 to 8.31) | 2% | 89 | 30 tenpai hands |
| Immediate riichi rate | 84.1% | 74.3% (66.3% to 82.3%) | 21% | 97 | 30 tenpai hands |
| Dama rate | 7.7% | 11.7% (4.6% to 18.7%) | 30% | 57 | 26 wins |
| Riichi income | 1,002 | 2,462 (1,604 to 3,320) | 10% | 9 | 41 riichi |
| Riichi win rate | 29.3% | 42.8% (35.4% to 50.2%) | 19% | 1 | 41 riichi |
| Riichi deal-in rate A | 17.1% | 14.4% (12.4% to 16.3%) | 2% | 25 | 41 riichi |
| Riichi deal-in rate B | 9.8% | 11.0% (8.3% to 13.7%) | 4% | 57 | 41 riichi |
| Riichi good-wait rate | 36.6% | 48.2% (41.7% to 54.6%) | 12% | 4 | 41 riichi |
| Riichi exhaustive draw rate | 26.8% | 20.4% (15.0% to 25.8%) | 15% | 84 | 41 riichi |
| Call income | 524 | 489 (17.36 to 961) | 7% | 60 | 45 calls |
| Win rate after calling | 26.7% | 29.3% (23.3% to 35.4%) | 15% | 41 | 45 calls |
| Deal-in rate after calling | 11.1% | 11.5% (7.2% to 15.7%) | 15% | 44 | 45 calls |
| Metric | Actual | Percentile | Count |
|---|---|---|---|
| Starting hand (shanten) | +0.08 | 92 | 171 hands |
| Dora and red fives dealt | +0.00 | 52 | 171 hands |
| Draw luck | -0.8% | 20 | 2,014 tile draws |
| Ura-dora luck | -0.12 | 20 | 12 riichi wins |
| Ippatsu rate | +5.3% | 73 | 12 riichi wins |
| Avoiding a chase riichi (/first riichi) | +11.6% | 92 | 29 first riichi |
| Mangan+ tsumo against dealer rate | 8.0% | 79 | 50 tsumo against |
| Points from luck (/game) | -5.7 | 22 | 13 games |
| Category | Frequency | Balance per hand | League average | Difference |
|---|---|---|---|---|
| Wins with riichi | 7.0% | +535 | +919 | -384 |
| Wins with calls | 7.0% | +412 | +382 | +30 |
| Dama wins | 1.2% | +68 | +173 | -105 |
| Deal-ins to riichi | 4.7% | -398 | -360 | -38 |
| Deal-ins to open hands | 7.6% | -321 | -203 | -118 |
| Deal-ins to dama | 1.2% | -23 | -101 | +78 |
| Others' tsumo | 29.2% | -766 | -752 | -14 |
| Other (exhaustive draws, etc.) | 42.1% | +61 | -60 | +121 |
| Total (per hand) | -432 |
2025-26 (34 games · skill estimate 3.0pt/game)
Style
Where the points came from
As a table
| Hand result | Hands | Total | Per game |
|---|---|---|---|
| Own wins | 92 | +1925.4 | +56.6 |
| Deal-ins | 47 | -627.8 | -18.5 |
| Others' tsumo | 107 | -746.2 | -21.9 |
| Ron between others | 106 | -29.1 | -0.9 |
| Exhaustive draws | 73 | -12.1 | -0.4 |
Luck
Every number for 2025-26
| Metric | Actual | Estimate (90% interval) | Weight of the record | Percentile | Count |
|---|---|---|---|---|---|
| Average placement | 2.12 | 2.43 (2.24 to 2.61) | 19% | 97 | 34 games |
| Points per game | 14.8 | 3.0 (-4.5 to 10.4) | 20% | 97 | 34 games |
| Points per game, luck removed | 9.1 | 2.3 (-4.4 to 9.1) | 26% | 90 | 34 games |
| 1st-place rate | 41.2% | 28.4% (21.2% to 35.7%) | 21% | 97 | 34 games |
| 4th-place rate | 14.7% | 22.7% (15.3% to 30.0%) | 22% | 95 | 34 games |
| Metric | Actual | Estimate (90% interval) | Weight of the record | Percentile | Count |
|---|---|---|---|---|---|
| Win rate | 21.6% | 20.6% (18.4% to 22.7%) | 35% | 70 | 425 hands |
| Deal-in rate | 11.1% | 11.0% (9.4% to 12.6%) | 31% | 59 | 425 hands |
| Riichi rate | 27.3% | 24.4% (22.2% to 26.6%) | 37% | 90 | 425 hands |
| Call rate | 18.6% | 19.2% (16.1% to 22.3%) | 87% | 9 | 425 hands |
| First riichi rate | 80.2% | 76.9% (73.0% to 80.7%) | 20% | 92 | 116 riichi |
| Average riichi turn | 9.00 | 9.20 (8.86 to 9.54) | 41% | 80 | 116 riichi |
| Average win value | 6,938 | 6,684 (6,196 to 7,173) | 27% | 77 | 92 wins |
| Average deal-in value | 5,100 | 5,553 (5,054 to 6,053) | 14% | 77 | 47 deal-ins |
| Win efficiency | 1,681 | 1,484 (1,383 to 1,584) | 5% | 92 | 425 hands |
| Deal-in loss | 585 | 630 (533 to 728) | 16% | 70 | 425 hands |
| Net efficiency | 1,096 | 881 (680 to 1,082) | 18% | 95 | 425 hands |
| Push rate vs riichi (1-shanten) | 49.3% | 43.3% (37.2% to 49.3%) | 29% | 86 | 73 hands facing riichi |
| Push rate vs riichi (2+ shanten) | 25.0% | 25.3% (19.8% to 30.8%) | 50% | 44 | 92 hands facing riichi |
| Tenpai rate after the first call | 32.9% | 29.7% (23.6% to 35.9%) | 56% | 95 | 79 first calls |
| Average win turn | 12.79 | 12.39 (12.24 to 12.53) | 2% | 11 | 92 wins |
| Tenpai rate at exhaustive draws | 46.6% | 41.9% (35.9% to 47.9%) | 29% | 77 | 73 exhaustive draws |
| Staying in vs riichi | 15.0% | 14.2% (12.4% to 16.0%) | 10% | 72 | 213 hands facing an opponent’s riichi |
| Tile efficiency match rate | 72.4% | 72.4% (71.0% to 73.9%) | 87% | 19 | 2,225 discards |
| Average ukeire loss (tiles) | 1.13 | 1.12 (1.03 to 1.21) | 78% | 85 | 2,121 discards |
| Breaking shape for value | 1.6% | 1.7% (1.3% to 2.1%) | 70% | 21 | 2,225 discards |
| Tenpai turn (luck-adjusted) | 8.19 | 8.17 (8.05 to 8.29) | 6% | 72 | 106 tenpai hands |
| Immediate riichi rate | 76.0% | 73.8% (68.6% to 79.0%) | 49% | 77 | 106 tenpai hands |
| Dama rate | 5.4% | 8.6% (4.0% to 13.2%) | 60% | 9 | 92 wins |
| Riichi income | 3,053 | 2,725 (2,059 to 3,391) | 24% | 75 | 116 riichi |
| Riichi win rate | 49.1% | 47.3% (42.1% to 52.5%) | 40% | 62 | 116 riichi |
| Riichi deal-in rate A | 14.7% | 14.3% (12.5% to 16.1%) | 4% | 54 | 116 riichi |
| Riichi deal-in rate B | 12.1% | 11.2% (8.8% to 13.5%) | 11% | 37 | 116 riichi |
| Riichi good-wait rate | 44.8% | 48.4% (43.5% to 53.2%) | 28% | 19 | 116 riichi |
| Riichi exhaustive draw rate | 19.0% | 19.2% (15.2% to 23.1%) | 32% | 77 | 116 riichi |
| Call income | 1,152 | 565 (135 to 994) | 12% | 87 | 79 calls |
| Win rate after calling | 38.0% | 31.7% (26.6% to 36.9%) | 24% | 90 | 79 calls |
| Deal-in rate after calling | 8.9% | 10.9% (7.3% to 14.5%) | 24% | 80 | 79 calls |
| Metric | Actual | Percentile | Count |
|---|---|---|---|
| Starting hand (shanten) | +0.01 | 54 | 425 hands |
| Dora and red fives dealt | +0.01 | 75 | 425 hands |
| Draw luck | +0.6% | 77 | 5,115 tile draws |
| Ura-dora luck | -0.00 | 37 | 57 riichi wins |
| Ippatsu rate | -0.4% | 54 | 57 riichi wins |
| Avoiding a chase riichi (/first riichi) | -6.9% | 9 | 93 first riichi |
| Mangan+ tsumo against dealer rate | 11.2% | 63 | 107 tsumo against |
| Points from luck (/game) | +5.7 | 95 | 34 games |
| Category | Frequency | Balance per hand | League average | Difference |
|---|---|---|---|---|
| Wins with riichi | 13.4% | +1,197 | +919 | +278 |
| Wins with calls | 7.1% | +410 | +382 | +28 |
| Dama wins | 1.2% | +73 | +173 | -100 |
| Deal-ins to riichi | 4.7% | -384 | -360 | -24 |
| Deal-ins to open hands | 5.2% | -187 | -203 | +17 |
| Deal-ins to dama | 1.2% | -47 | -101 | +54 |
| Others' tsumo | 25.2% | -718 | -752 | +35 |
| Other (exhaustive draws, etc.) | 42.1% | -31 | -60 | +29 |
| Total (per hand) | +314 |
Players with a similar styleclosest career style metrics first
This player's style differs substantially from everyone else's. These players are the closest matches.
- Mari TakamiyaKONAMI MAH-JONG FIGHT CLUBIn common: Riichi-heavy
- Arisa DateKONAMI MAH-JONG FIGHT CLUBIn common: Riichi-heavy
- Akina MizuharaU-NEXT PiratesIn common: Riichi-heavy, Often tenpai at exhaustive draws
* 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.