Challenge 3・4 Free Practice Results
DATE:2018-04-08 WEATHER: Fine COURSE: Dry International South Course 1.264km
| Pos. | No. | Cls. | Rider | Type | Team | Time | Delay | Gap | Lap | |
| 1 | 45 | Challenge 4 | 1 | Miyata Kei | Honda CRF250X | Club Selection | 1'00.859 | 74.77km/h | 9/9 | |
| 2 | 4 | Challenge 4 | 2 | Sekiuchi Satoru | Kawasaki Ninja250SL | AGGRESSI Department | 1'02.344 | 1.485 | 1.485 | 6/9 |
| 3 | 2 | Challenge 3 | 1 | Hiroaki Akazawa | Suzuki SV400S | 8stroke | 1'02.499 | 1.640 | 0.155 | 10/10 |
| 4 | 52 | Challenge 4 | 3 | Hiroji Yagi | Honda CBR250R | Tsubaki Racing | 1'02.623 | 1.764 | 0.124 | 9/9 |
| 5 | 34 | Challenge 4 | 4 | Suzuka Circuit | Kawasaki Ninja250 | Kamikaze Racing | 1'02.772 | 1.913 | 0.149 | 5/9 |
| 6 | 32 | Challenge 4 | 5 | Hiroshi Kaneda | Kawasaki Ninja250SL | TW's Racing & KIKS | 1'03.611 | 2.752 | 0.839 | 9/9 |
| 7 | 15 | Challenge 4 | 6 | Asai Tsune | Kawasaki Ninja250SL | Aggressive Section | 1'04.877 | 4.018 | 1.266 | 8/9 |
| 8 | 22 | Challenge 4 | 7 | Yusuke Yamada | Yamaha YZ250FX | Phantom Chick Group | 1'05.980 | 5.121 | 1.103 | 8/9 |
| 9 | 1 | Challenge 4 | 8 | Koji Kuribayashi | Honda CBR250RR | RC Motolabo EJ | 1'06.031 | 5.172 | 0.051 | 9/9 |
| 10 | 93 | Challenge 4 | 9 | Yuzo Furumi | Honda CRF250L | Club Motorabo EJ | 1'09.807 | 8.948 | 3.776 | 8/8 |
| 11 | 66 | Challenge 4 | 10 | Akihiro Fujii | Kawasaki Ninja250 | CLUB Motor Lab EJ | 1'10.353 | 9.494 | 0.546 | 6/9 |
| 46 | Challenge 4 | Yuka Hirano | Honda CBR250R | CLUB Motor Lab EJ | Did not participate |
