Jockey Iwata Kosei Complete Betting Guide【2023-2025 JRA Data Analysis】
2026 JRA Jockey Ranking #37
⭐ Key Betting Tips for Iwata Kosei
- 🏇 Best Track×Surface: Hanshin Dirt (Win 12.5% / ROI 190.2%)
- 📏 Best Distance: Dirt 1800-2200m (Win 10.8% / ROI 124.2%)
- 🏠 Best Stable: Akira Takei (Win 13.0% / ROI 593.9%)
- 👑 Best Owner: Tou Iyama (Win 20.0% / ROI 756.7%)
- 🌿 Best Farm: Yanagawa Farm (Win 17.9% / ROI 315.0%)
- 🔄 Jockey Change: Continuing rides better (Cont. 99.9% vs Change 76.3%)
Data period: 2023–2025 / Full analysis of tracks, surfaces, distances, jockey changes, stables, owners and farms.
Overall Record (2023–2025)
109
Wins
8.3%
Win Rate
15.5%
Place Rate
23.8%
Show Rate
83.4%
Win ROI
Annual Record
| Year | Starts | Wins | Win% | Place% | Show% | Win ROI |
|---|---|---|---|---|---|---|
| 2023 | 403 | 25 | 6.2% | 12.9% | 21.6% | 54.4% |
| 2024 | 402 | 41 | 10.2% | 15.9% | 24.1% | 125.5% |
| 2025 | 502 | 43 | 8.6% | 17.3% | 25.3% | 73.0% |
Performance by Track × Surface (Top ROI)
| Track | Surface | Starts | Wins | Win% | Win ROI |
|---|---|---|---|---|---|
| Hanshin | Dirt | 152 | 19 | 12.5% | 190.2% |
| Sapporo | Turf | 32 | 5 | 15.6% | 187.2% |
| Hakodate | Dirt | 28 | 4 | 14.3% | 121.8% |
| Kyoto | Dirt | 155 | 14 | 9.0% | 112.0% |
| Nakayama | Turf | 54 | 6 | 11.1% | 103.1% |
| Nakayama | Dirt | 54 | 7 | 13.0% | 86.5% |
| Tokyo | Turf | 78 | 4 | 5.1% | 77.8% |
| Hanshin | Turf | 126 | 12 | 9.5% | 67.5% |
Performance by Surface × Distance
| Surface | Distance | Starts | Wins | Win% | Win ROI |
|---|---|---|---|---|---|
| Turf | up to 1400m | 104 | 5 | 4.8% | 19.5% |
| Turf | 1400-1800m | 234 | 16 | 6.8% | 61.1% |
| Turf | 1800-2200m | 233 | 23 | 9.9% | 92.2% |
| Turf | 2200m+ | 79 | 7 | 8.9% | 79.7% |
| Dirt | up to 1400m | 138 | 9 | 6.5% | 69.6% |
| Dirt | 1400-1800m | 236 | 18 | 7.6% | 86.1% |
| Dirt | 1800-2200m | 277 | 30 | 10.8% | 124.2% |
Jockey Change Analysis
🔄 After Jockey Change
7.4%
Win Rate (794 rides)
76.3%
Win ROI
✅ Continuing Rider
11.7%
Win Rate (325 rides)
99.9%
Win ROI
Previous Jockey Breakdown
| Prev. Jockey | Rides | Wins | Win% | Win ROI |
|---|---|---|---|---|
| 岩田望来 | 49 | 3 | 6.1% | 46.3% |
| 戸崎圭太 | 25 | 3 | 12.0% | 131.2% |
| 横山和生 | 24 | 3 | 12.5% | 185.4% |
| 横山武史 | 22 | 1 | 4.5% | 137.7% |
| 松山弘平 | 21 | 2 | 9.5% | 56.2% |
| 坂井瑠星 | 20 | 2 | 10.0% | 37.0% |
| 西村淳也 | 19 | 0 | 0.0% | 0.0% |
| 鮫島克駿 | 19 | 2 | 10.5% | 35.3% |
Top 5 Recommended Stables (ROI)
| Stable | Starts | Win% | Win ROI |
|---|---|---|---|
| Akira Takei Stable | 23 | 13.0% | 593.9% |
| Eiji Nakadate Stable | 10 | 30.0% | 560.0% |
| Kazuya Nakatake Stable | 19 | 21.1% | 443.7% |
| Takashi Kanari Stable | 11 | 9.1% | 420.9% |
| Shougo Yasuda Stable | 38 | 15.8% | 251.1% |
Stable Win Rankings TOP10
| # | Stable | Starts | Wins | Win% |
|---|---|---|---|---|
| 1 | Youkou Kamimura Stable | 114 | 21 | 18.4% |
| 2 | Takeshi Okumura Stable | 61 | 8 | 13.1% |
| 3 | Shougo Yasuda Stable | 38 | 6 | 15.8% |
| 4 | Yukihiro Katou Stable | 40 | 6 | 15.0% |
| 5 | Kazuya Nakatake Stable | 19 | 4 | 21.1% |
| 6 | Tooru Kurita Stable | 27 | 4 | 14.8% |
| 7 | Akira Takei Stable | 23 | 3 | 13.0% |
| 8 | Eiji Nakadate Stable | 10 | 3 | 30.0% |
| 9 | Yutaka Okumura Stable | 12 | 3 | 25.0% |
| 10 | Tomoyuki Umeda Stable | 24 | 3 | 12.5% |
Top 5 Recommended Owners (ROI)
| Owner | Starts | Win% | Win ROI |
|---|---|---|---|
| Tou Iyama | 15 | 20.0% | 756.7% |
| Makoto Katou | 11 | 18.2% | 336.4% |
| Normandy Thoroughbred | 33 | 15.2% | 169.1% |
| Tomoko Hirosaki | 10 | 20.0% | 158.0% |
| Houou Ozasa | 33 | 15.2% | 154.8% |
Owner Win Rankings TOP10
| # | Owner | Starts | Wins | Win% |
|---|---|---|---|---|
| 1 | Normandy Thoroughbred | 33 | 5 | 15.2% |
| 2 | Houou Ozasa | 33 | 5 | 15.2% |
| 3 | Hirotsugu Inokuma | 14 | 5 | 35.7% |
| 4 | Tou Iyama | 15 | 3 | 20.0% |
| 5 | Reiko Hara | 27 | 3 | 11.1% |
| 6 | Yoshitaka Matsumoto | 19 | 3 | 15.8% |
| 7 | Itan Zushi | 21 | 3 | 14.3% |
| 8 | Toshihirohd Hirosaki | 23 | 3 | 13.0% |
| 9 | Sunday Racing | 30 | 3 | 10.0% |
| 10 | Makoto Katou | 11 | 2 | 18.2% |
Top 5 Recommended Farms (ROI)
| Farm | Starts | Win% | Win ROI |
|---|---|---|---|
| Yanagawa Farm | 28 | 17.9% | 315.0% |
| Fujiwara Farm | 19 | 15.8% | 291.6% |
| Shimokawabe Farm | 25 | 12.0% | 134.0% |
| Bokujou Nakahara | 11 | 45.5% | 110.0% |
| Okada Stud | 55 | 12.7% | 103.5% |
Farm Win Rankings TOP10
| # | Farm | Starts | Wins | Win% |
|---|---|---|---|---|
| 1 | Northern Farm | 206 | 14 | 6.8% |
| 2 | Shadai Farm | 121 | 9 | 7.4% |
| 3 | Okada Stud | 55 | 7 | 12.7% |
| 4 | Yanagawa Farm | 28 | 5 | 17.9% |
| 5 | Bokujou Nakahara | 11 | 5 | 45.5% |
| 6 | Ask stud | 25 | 4 | 16.0% |
| 7 | Fujiwara Farm | 19 | 3 | 15.8% |
| 8 | Shimokawabe Farm | 25 | 3 | 12.0% |
| 9 | Bokujou Fujiwara | 16 | 2 | 12.5% |
| 10 | Bokujou Hattori | 16 | 2 | 12.5% |
Disclaimer: Data covers JRA races from 2023–2025. Past performance does not guarantee future results. Bet responsibly.