Data period: 2023–2025 (JRA) / Target jockeys: 2026 active riders only / Win ROI = theoretical return per ¥100 bet on all starters
Trainer Kamimura Hiroyuki Complete Betting Guide【2023–2025 JRA Data Analysis】
3-year combined win ROI: 105.9%. Turf 65% / Dirt 35% split. 2026 active jockeys: Yuichi Kitamura Ryusei Sakai Yasunari Iwata Nozomi Iwata Kohei Matsuyama Kazuo Yokoyama 高杉吏麒.
※ Signal ratings apply only to jockeys with 2026 riding records at this stable.
🚦 Distance-Based Betting Signals
◎Top Pick: ROI 100%+○Strong: ROI 80%+ & WinRate 8%+▲Watch: ROI 60%+ & WinRate 6%+×Avoid
Turf~1400m100 starts / ◎0 ○1
Win%: 13.0%Place%: 21.0%Show%: 36.0%ROI: 60.0%
💡 Kohei Matsuyama also show solid stats for win or place bets.ROI is on an upward trend. Overall show rate 36.0% is high — effective as place anchor.
| Rating | Jockey | Starts | Win% | Place% | Show% | Win ROI |
|---|---|---|---|---|---|---|
| ○ | Kohei Matsuyama | 10 | 20.0% | 30.0% | 40.0% | 91.0% |
| ▲ | Nozomi Iwata | 16 | 18.8% | 25.0% | 50.0% | 70.0% |
| × | Yasunari Iwata | 22 | 13.6% | 27.3% | 54.5% | 58.6% |
| × | Yuichi Kitamura | 7 | 0.0% | 14.3% | 14.3% | 0.0% |
| × | Ryusei Sakai | 5 | 0.0% | 0.0% | 20.0% | 0.0% |
Turf1401~1800m184 starts / ◎3 ○0
Win%: 19.0%Place%: 32.6%Show%: 41.8%ROI: 121.8%
💡 Yasunari Iwata・Kazuo Yokoyama・Nozomi Iwata stand out with ROI of 188.4%・166.7%・141.3%. Primary win bet candidates.ROI is on a slight downward trend. Overall show rate 41.8% is high — effective as place anchor.
| Rating | Jockey | Starts | Win% | Place% | Show% | Win ROI |
|---|---|---|---|---|---|---|
| ◎ | Yasunari Iwata | 19 | 21.1% | 26.3% | 26.3% | 188.4% |
| ◎ | Kazuo Yokoyama | 9 | 44.4% | 66.7% | 66.7% | 166.7% |
| ◎ | Nozomi Iwata | 39 | 23.1% | 33.3% | 46.2% | 141.3% |
| ▲ | Yuichi Kitamura | 14 | 14.3% | 35.7% | 42.9% | 75.0% |
| ▲ | Kohei Matsuyama | 8 | 12.5% | 62.5% | 62.5% | 72.5% |
| ▲ | Ryusei Sakai | 10 | 10.0% | 50.0% | 70.0% | 71.0% |
Turf1801~2200m139 starts / ◎4 ○1
Win%: 22.3%Place%: 40.3%Show%: 52.5%ROI: 135.0%
💡 Nozomi Iwata・Kazuo Yokoyama・Kohei Matsuyama stand out with ROI of 178.4%・165.8%・142.0%. Primary win bet candidates.Yuichi Kitamura also show solid stats for win or place bets.ROI is on an upward trend. Overall show rate 52.5% is high — effective as place anchor.
| Rating | Jockey | Starts | Win% | Place% | Show% | Win ROI |
|---|---|---|---|---|---|---|
| ◎ | Nozomi Iwata | 31 | 25.8% | 45.2% | 54.8% | 178.4% |
| ◎ | Kazuo Yokoyama | 12 | 33.3% | 50.0% | 58.3% | 165.8% |
| ◎ | Kohei Matsuyama | 10 | 30.0% | 50.0% | 60.0% | 142.0% |
| ◎ | Yasunari Iwata | 26 | 23.1% | 50.0% | 65.4% | 136.2% |
| ○ | Yuichi Kitamura | 11 | 27.3% | 45.5% | 54.5% | 84.5% |
Turf2201m+26 starts / ◎0 ○1
Win%: 11.5%Place%: 26.9%Show%: 26.9%ROI: 91.5%
💡 Kazuo Yokoyama also show solid stats for win or place bets.ROI is on a slight downward trend. Overall show rate 26.9% is high — effective as place anchor.
| Rating | Jockey | Starts | Win% | Place% | Show% | Win ROI |
|---|---|---|---|---|---|---|
| ○ | Kazuo Yokoyama | 5 | 40.0% | 40.0% | 40.0% | 92.0% |
Dirt~1400m97 starts / ◎1 ○2
Win%: 14.4%Place%: 24.7%Show%: 29.9%ROI: 76.3%
💡 Ryusei Sakai stand out with ROI of 322.0%. Primary win bet candidates.Yasunari Iwata・Kohei Matsuyama also show solid stats for win or place bets.ROI is stable. Overall show rate 29.9% is high — effective as place anchor.
| Rating | Jockey | Starts | Win% | Place% | Show% | Win ROI |
|---|---|---|---|---|---|---|
| ◎ | Ryusei Sakai | 5 | 60.0% | 60.0% | 60.0% | 322.0% |
| ○ | Yasunari Iwata | 9 | 11.1% | 22.2% | 22.2% | 96.7% |
| ○ | Kohei Matsuyama | 17 | 29.4% | 41.2% | 52.9% | 94.7% |
| × | Nozomi Iwata | 15 | 0.0% | 6.7% | 13.3% | 0.0% |
| × | Kazuo Yokoyama | 5 | 0.0% | 20.0% | 40.0% | 0.0% |
Dirt1401~1800m141 starts / ◎4 ○0
Win%: 21.3%Place%: 35.5%Show%: 44.7%ROI: 113.0%
💡 Kazuo Yokoyama・Yasunari Iwata・Nozomi Iwata stand out with ROI of 252.0%・119.5%・107.4%. Primary win bet candidates.ROI is on a slight downward trend. Overall show rate 44.7% is high — effective as place anchor.
| Rating | Jockey | Starts | Win% | Place% | Show% | Win ROI |
|---|---|---|---|---|---|---|
| ◎ | Kazuo Yokoyama | 10 | 20.0% | 30.0% | 60.0% | 252.0% |
| ◎ | Yasunari Iwata | 37 | 18.9% | 27.0% | 29.7% | 119.5% |
| ◎ | Nozomi Iwata | 27 | 22.2% | 44.4% | 55.6% | 107.4% |
| ◎ | Kohei Matsuyama | 9 | 22.2% | 33.3% | 55.6% | 100.0% |
| × | Yuichi Kitamura | 5 | 20.0% | 20.0% | 20.0% | 32.0% |
※ Jockeys with fewer than 5 starts excluded. Target jockeys limited to 2026 active riders.
⚡ Trainer Betting Strategy
Actionable betting scenarios based on 2026 active jockey data.
🔴 Scenario A【Top Priority】 Dirt ~1400m
◎ Jockeys: Ryusei Sakai (322.0%)
Overall ROI 76.3% / Show rate 29.9%. Bet aggressively when ◎ jockeys confirmed.
💰 Recommended: Win + Place. For long-shot ◎ jockeys, go heavier on Place/Wide.
🟡 Scenario B【Secondary】 Dirt 1401~1800m
◎ Jockeys: Kazuo Yokoyama (252.0%)・Yasunari Iwata (119.5%)・Nozomi Iwata (107.4%)・Kohei Matsuyama (100.0%)
Overall ROI 113.0% / Show rate 44.7%. Bet aggressively when ◎ jockeys confirmed.
💰 Recommended: Win + Place. For long-shot ◎ jockeys, go heavier on Place/Wide.
🟡 Scenario C【Secondary】 Turf 1401~1800m
◎ Jockeys: Yasunari Iwata (188.4%)・Kazuo Yokoyama (166.7%)・Nozomi Iwata (141.3%)
Overall ROI 121.8% / Show rate 41.8%. Bet aggressively when ◎ jockeys confirmed.
💰 Recommended: Win + Place. For long-shot ◎ jockeys, go heavier on Place/Wide.
📋 Jockey Substitution Checklist
| Jockey | Best Condition | Best ROI | Overall ROI | Recommended Bet |
|---|---|---|---|---|
| Ryusei Sakai | Dirt ~1400m | 322.0% | 122.7% | Win◎ |
| Kazuo Yokoyama | Dirt 1401~1800m | 252.0% | 150.5% | Win◎ |
| Yasunari Iwata | Turf 1401~1800m | 188.4% | 120.2% | Win◎ |
| Nozomi Iwata | Turf 1801~2200m | 178.4% | 114.1% | Win◎ |
| Kohei Matsuyama | Turf 1801~2200m | 142.0% | 98.5% | Win+Place |
| Yuichi Kitamura | Turf 1801~2200m | 84.5% | 53.5% | Place only |
| 高杉吏麒 | 0% | 0.0% | Place only |
📊 Data Details (Supporting Evidence)
Detailed stats supporting the signal ratings above.
Overall Performance by Year
| Year | Starts | Win% | Place% | Show% | Win ROI |
|---|---|---|---|---|---|
| 2023 | 236 | 16.9% | 29.2% | 38.1% | 110.6% |
| 2024 | 231 | 18.6% | 32.0% | 43.7% | 117.2% |
| 2025 | 221 | 19.5% | 33.9% | 42.5% | 89.2% |
| Total | 688 | 18.3% | 31.7% | 41.4% | 105.9% |
Turf Performance by Year × Distance
Turf Sprint (~1400m)
| Year | Starts | Win% | Place% | Show% | Win ROI |
|---|---|---|---|---|---|
| 2023 | 30 | 3.3% | 10.0% | 13.3% | 22.0% |
| 2024 | 35 | 17.1% | 22.9% | 42.9% | 69.7% |
| 2025 | 35 | 17.1% | 28.6% | 48.6% | 82.9% |
Turf Mile (1401~1800m)
| Year | Starts | Win% | Place% | Show% | Win ROI |
|---|---|---|---|---|---|
| 2023 | 66 | 22.7% | 37.9% | 48.5% | 174.5% |
| 2024 | 60 | 18.3% | 31.7% | 41.7% | 121.7% |
| 2025 | 58 | 15.5% | 27.6% | 34.5% | 61.9% |
Turf Middle (1801~2200m)
| Year | Starts | Win% | Place% | Show% | Win ROI |
|---|---|---|---|---|---|
| 2023 | 39 | 17.9% | 25.6% | 43.6% | 91.5% |
| 2024 | 51 | 19.6% | 37.3% | 51.0% | 163.9% |
| 2025 | 49 | 28.6% | 55.1% | 61.2% | 139.6% |
Turf Long (2201m+)
| Year | Starts | Win% | Place% | Show% | Win ROI |
|---|---|---|---|---|---|
| 2023 | 13 | 7.7% | 15.4% | 15.4% | 147.7% |
| 2024 | 5 | 0.0% | 20.0% | 20.0% | 0.0% |
| 2025 | 8 | 25.0% | 50.0% | 50.0% | 57.5% |
Dirt Performance by Year × Distance
Dirt Sprint (~1400m)
| Year | Starts | Win% | Place% | Show% | Win ROI |
|---|---|---|---|---|---|
| 2023 | 52 | 17.3% | 26.9% | 28.8% | 84.4% |
| 2024 | 22 | 9.1% | 22.7% | 36.4% | 52.3% |
| 2025 | 23 | 13.0% | 21.7% | 26.1% | 80.9% |
Dirt Middle (1401~1800m)
| Year | Starts | Win% | Place% | Show% | Win ROI |
|---|---|---|---|---|---|
| 2023 | 35 | 20.0% | 42.9% | 57.1% | 115.4% |
| 2024 | 58 | 24.1% | 37.9% | 44.8% | 134.8% |
| 2025 | 48 | 18.8% | 27.1% | 35.4% | 84.8% |
Dirt Long (1801~2200m)
| Year | Starts | Win% | Place% | Show% | Win ROI |
|---|---|---|---|---|---|
| 2023 | 1 | 0.0% | 0.0% | 0.0% | 0.0% |
| 2024 | — | ||||
| 2025 | — | ||||
Jockey Stats (3-Year Combined / 2026 Active Only)
| Jockey | Starts | Win% | Place% | Show% | Win ROI |
|---|---|---|---|---|---|
| Nozomi Iwata | 132 | 19.7% | 34.8% | 47.0% | 114.1% |
| Yasunari Iwata | 114 | 18.4% | 31.6% | 41.2% | 120.2% |
| Kohei Matsuyama | 55 | 23.6% | 41.8% | 52.7% | 98.5% |
| Kazuo Yokoyama | 43 | 27.9% | 41.9% | 53.5% | 150.5% |
| Yuichi Kitamura | 40 | 15.0% | 30.0% | 35.0% | 53.5% |
| Ryusei Sakai | 26 | 23.1% | 38.5% | 57.7% | 122.7% |
| 高杉吏麒 | 4 | 0.0% | 0.0% | 25.0% | 0.0% |
Key Jockey Breakdown: Turf × Dirt × Year
▶ Nozomi Iwata
| Year | Turf Starts | Turf Win% | Turf Place% | Turf Show% | Turf ROI | Dirt Starts | Dirt Win% | Dirt Place% | Dirt Show% | Dirt ROI |
|---|---|---|---|---|---|---|---|---|---|---|
| 2023 | 15 | 20.0% | 40.0% | 40.0% | 145.3% | 14 | 7.1% | 28.6% | 35.7% | 18.6% |
| 2024 | 36 | 25.0% | 38.9% | 58.3% | 184.7% | 18 | 22.2% | 38.9% | 44.4% | 117.2% |
| 2025 | 39 | 20.5% | 33.3% | 46.2% | 85.4% | 10 | 10.0% | 20.0% | 40.0% | 53.0% |
| Total | 90 | 22.2% | 36.7% | 50.0% | 135.1% | 42 | 14.3% | 31.0% | 40.5% | 69.0% |
▶ Yasunari Iwata
| Year | Turf Starts | Turf Win% | Turf Place% | Turf Show% | Turf ROI | Dirt Starts | Dirt Win% | Dirt Place% | Dirt Show% | Dirt ROI |
|---|---|---|---|---|---|---|---|---|---|---|
| 2023 | 1 | 0.0% | 0.0% | 0.0% | 0.0% | 1 | 0.0% | 0.0% | 0.0% | 0.0% |
| 2024 | 33 | 18.2% | 24.2% | 45.5% | 205.2% | 19 | 21.1% | 31.6% | 31.6% | 163.2% |
| 2025 | 34 | 20.6% | 47.1% | 55.9% | 48.2% | 26 | 15.4% | 23.1% | 26.9% | 84.2% |
| Total | 68 | 19.1% | 35.3% | 50.0% | 123.7% | 46 | 17.4% | 26.1% | 28.3% | 115.0% |
▶ Kohei Matsuyama
| Year | Turf Starts | Turf Win% | Turf Place% | Turf Show% | Turf ROI | Dirt Starts | Dirt Win% | Dirt Place% | Dirt Show% | Dirt ROI |
|---|---|---|---|---|---|---|---|---|---|---|
| 2023 | 13 | 7.7% | 23.1% | 38.5% | 50.8% | 12 | 25.0% | 41.7% | 58.3% | 71.7% |
| 2024 | 8 | 25.0% | 62.5% | 62.5% | 95.0% | 8 | 37.5% | 50.0% | 62.5% | 158.8% |
| 2025 | 8 | 37.5% | 62.5% | 62.5% | 186.2% | 6 | 16.7% | 16.7% | 33.3% | 63.3% |
| Total | 29 | 20.7% | 44.8% | 51.7% | 100.3% | 26 | 26.9% | 38.5% | 53.8% | 96.5% |
▶ Kazuo Yokoyama
| Year | Turf Starts | Turf Win% | Turf Place% | Turf Show% | Turf ROI | Dirt Starts | Dirt Win% | Dirt Place% | Dirt Show% | Dirt ROI |
|---|---|---|---|---|---|---|---|---|---|---|
| 2023 | 6 | 50.0% | 50.0% | 50.0% | 248.3% | 6 | 33.3% | 50.0% | 83.3% | 420.0% |
| 2024 | 12 | 33.3% | 50.0% | 58.3% | 124.2% | 7 | 0.0% | 14.3% | 42.9% | 0.0% |
| 2025 | 10 | 30.0% | 50.0% | 50.0% | 97.0% | 2 | 0.0% | 0.0% | 0.0% | 0.0% |
| Total | 28 | 35.7% | 50.0% | 53.6% | 141.1% | 15 | 13.3% | 26.7% | 53.3% | 168.0% |
▶ Yuichi Kitamura
| Year | Turf Starts | Turf Win% | Turf Place% | Turf Show% | Turf ROI | Dirt Starts | Dirt Win% | Dirt Place% | Dirt Show% | Dirt ROI |
|---|---|---|---|---|---|---|---|---|---|---|
| 2023 | 10 | 0.0% | 10.0% | 10.0% | 0.0% | 1 | 0.0% | 0.0% | 0.0% | 0.0% |
| 2024 | — | — | ||||||||
| 2025 | 24 | 20.8% | 41.7% | 50.0% | 82.5% | 5 | 20.0% | 20.0% | 20.0% | 32.0% |
| Total | 34 | 14.7% | 32.4% | 38.2% | 58.2% | 6 | 16.7% | 16.7% | 16.7% | 26.7% |
▶ Ryusei Sakai
| Year | Turf Starts | Turf Win% | Turf Place% | Turf Show% | Turf ROI | Dirt Starts | Dirt Win% | Dirt Place% | Dirt Show% | Dirt ROI |
|---|---|---|---|---|---|---|---|---|---|---|
| 2023 | 12 | 8.3% | 33.3% | 50.0% | 59.2% | 6 | 50.0% | 50.0% | 66.7% | 268.3% |
| 2024 | 4 | 0.0% | 25.0% | 75.0% | 0.0% | 3 | 66.7% | 66.7% | 66.7% | 290.0% |
| 2025 | 1 | 0.0% | 0.0% | 0.0% | 0.0% | — | ||||
| Total | 17 | 5.9% | 29.4% | 52.9% | 41.8% | 9 | 55.6% | 55.6% | 66.7% | 275.6% |
▶ 高杉吏麒
| Year | Turf Starts | Turf Win% | Turf Place% | Turf Show% | Turf ROI | Dirt Starts | Dirt Win% | Dirt Place% | Dirt Show% | Dirt ROI |
|---|---|---|---|---|---|---|---|---|---|---|
| 2023 | — | — | ||||||||
| 2024 | 1 | 0.0% | 0.0% | 0.0% | 0.0% | 1 | 0.0% | 0.0% | 0.0% | 0.0% |
| 2025 | 1 | 0.0% | 0.0% | 0.0% | 0.0% | 1 | 0.0% | 0.0% | 100.0% | 0.0% |
| Total | 2 | 0.0% | 0.0% | 0.0% | 0.0% | 2 | 0.0% | 0.0% | 50.0% | 0.0% |
Grade Race Performance (G1 / G2 / G3)
G1
| Year | Starts | Win% | Place% | Show% | Win ROI |
|---|---|---|---|---|---|
| 2023 | 5 | 0.0% | 0.0% | 0.0% | 0.0% |
| 2024 | 5 | 40.0% | 40.0% | 60.0% | 320.0% |
| 2025 | 11 | 9.1% | 36.4% | 36.4% | 46.4% |
| Total | 21 | 14.3% | 28.6% | 33.3% | 100.5% |
| Jockey | Starts | Win% | Place% | Show% | Win ROI |
|---|---|---|---|---|---|
| Kazuo Yokoyama | 8 | 25.0% | 37.5% | 50.0% | 132.5% |
| Nozomi Iwata | 7 | 14.3% | 42.9% | 42.9% | 150.0% |
| Yuichi Kitamura | 3 | 0.0% | 0.0% | 0.0% | 0.0% |
| Ryusei Sakai | 1 | 0.0% | 0.0% | 0.0% | 0.0% |
G2
| Year | Starts | Win% | Place% | Show% | Win ROI |
|---|---|---|---|---|---|
| 2023 | 14 | 14.3% | 21.4% | 21.4% | 163.6% |
| 2024 | 9 | 11.1% | 22.2% | 33.3% | 61.1% |
| 2025 | 6 | 0.0% | 33.3% | 66.7% | 0.0% |
| Total | 29 | 10.3% | 24.1% | 34.5% | 97.9% |
| Jockey | Starts | Win% | Place% | Show% | Win ROI |
|---|---|---|---|---|---|
| Nozomi Iwata | 7 | 0.0% | 14.3% | 28.6% | 0.0% |
| Yuichi Kitamura | 4 | 0.0% | 50.0% | 75.0% | 0.0% |
| Kazuo Yokoyama | 3 | 0.0% | 33.3% | 33.3% | 0.0% |
| Yasunari Iwata | 1 | 0.0% | 0.0% | 100.0% | 0.0% |
| Ryusei Sakai | 1 | 100.0% | 100.0% | 100.0% | 550.0% |
G3
| Year | Starts | Win% | Place% | Show% | Win ROI |
|---|---|---|---|---|---|
| 2023 | 8 | 12.5% | 25.0% | 37.5% | 68.8% |
| 2024 | 19 | 0.0% | 10.5% | 15.8% | 0.0% |
| 2025 | 13 | 15.4% | 23.1% | 30.8% | 81.5% |
| Total | 40 | 7.5% | 17.5% | 25.0% | 40.2% |
| Jockey | Starts | Win% | Place% | Show% | Win ROI |
|---|---|---|---|---|---|
| Nozomi Iwata | 9 | 22.2% | 22.2% | 44.4% | 117.8% |
| Yasunari Iwata | 8 | 0.0% | 0.0% | 0.0% | 0.0% |
| Yuichi Kitamura | 5 | 0.0% | 20.0% | 20.0% | 0.0% |
| Kohei Matsuyama | 2 | 0.0% | 0.0% | 0.0% | 0.0% |
| Kazuo Yokoyama | 2 | 50.0% | 50.0% | 50.0% | 275.0% |
| Ryusei Sakai | 1 | 0.0% | 0.0% | 100.0% | 0.0% |
※ Extreme ROI values may reflect small samples with high-dividend races. Treat data with fewer than 10 starts as reference only.
※ This data is for reference purposes only and does not constitute investment advice.