Round 6 of the 2018 Japanese Super Formula Championship was held at Okayama International Circuit in Japan on 9 September 2018. Yuhi Sekiguchi was the race winner.
Race Result
| Pos. | No. | Driver | Abbreviation | Nationality | Team | Engine | Tyre | Laps | Race Time | Gap | Best Lap |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 19 | Yuhi Sekiguchi | SEK | Japan | ITOCHU ENEX TEAM IMPUL | TOYOTA RI4A | Yokohama | 34 | 1:11:57.682 | - | 1:29.558 |
| 2 | 18 | Kamui Kobayashi | KON | Japan | KCMG Elyse | TOYOTA RI4A | Yokohama | 34 | 1:11:58.501 | 0.819 | 1:29.507 |
| 3 | 20 | Ryo Hirakawa | HIR | Japan | ITOCHU ENEX TEAM IMPUL | TOYOTA RI4A | Yokohama | 34 | 1:12:00.572 | 2.89 | 1:29.750 |
| 4 | 5 | Tomoki Nojiri | NOJ | Japan | DOCOMO DANDELION M5S | Honda HR-417E | Yokohama | 34 | 1:12:01.680 | 3.998 | 1:30.359 |
| 5 | 3 | Nick Cassidy | CAS | New Zealand | ORIENTALBIO KONDO | TOYOTA RI4A | Yokohama | 34 | 1:12:02.514 | 4.832 | 1:30.723 |
| 6 | 4 | Kenta Yamashita | KEN | Japan | ORIENTALBIO KONDO | TOYOTA RI4A | Yokohama | 34 | 1:12:04.537 | 6.855 | 1:30.933 |
| 7 | 1 | Hiroaki Ishiura | ISH | Japan | JMS P.MU/CERUMO・INGING | TOYOTA RI4A | Yokohama | 34 | 1:12:05.690 | 8.008 | 1:31.142 |
| 8 | 2 | Yuji Kunimoto | KUN | Japan | JMS P.MU/CERUMO・INGING | TOYOTA RI4A | Yokohama | 34 | 1:12:06.906 | 9.224 | 1:31.108 |
| 9 | 6 | Nobuharu Matsushita | MAT | Japan | DOCOMO DANDELION M6Y | Honda HR-417E | Yokohama | 34 | 1:12:08.031 | 10.349 | 1:31.814 |
| 10 | 16 | Naoki Yamamoto | NAO | Japan | TEAM MUGEN | Honda HR-417E | Yokohama | 34 | 1:12:09.422 | 11.74 | 1:32.316 |
| 11 | 37 | James Rossiter | ROS | Great Britain | VANTELIN KOWA TOM’S | TOYOTA RI4A | Yokohama | 34 | 1:12:09.900 | 12.218 | 1:32.137 |
| 12 | 17 | Koudai Tsukakoshi | TSU | Japan | REAL | Honda HR-417E | Yokohama | 34 | 1:12:14.066 | 16.384 | 1:31.858 |
| 13 | 64 | Narain Karthikeyan | KAR | India | TCS NAKAJIMA RACING | Honda HR-417E | Yokohama | 34 | 1:12:15.358 | 17.676 | 1:31.878 |
| 14 | 65 | Takuya Izawa | IZA | Japan | TCS NAKAJIMA RACING | Honda HR-417E | Yokohama | 34 | 1:12:17.776 | 20.094 | 1:31.454 |
| 15 | 50 | Katsumasa Chiyo | CHI | Japan | B-Max Racing | Honda HR-417E | Yokohama | 34 | 1:12:18.934 | 21.252 | 1:33.032 |
| 16 | 8 | Kazuya Oshima | OSH | Japan | UOMO SUNOCO | TOYOTA RI4A | Yokohama | 34 | 1:12:21.071 | 23.389 | 1:31.858 |
| 17 | 36 | Kazuki Nakajima | KAZ | Japan | VANTELIN KOWA TOM’S | TOYOTA RI4A | Yokohama | 34 | 1:12:41.375 | 43.693 | 1:31.866 |
| 18 | 15 | Nirei Fukuzumi | FUK | Japan | TEAM MUGEN | Honda HR-417E | Yokohama | 30 | 1:03:12.523 | 4 laps | 1:30.356 |
| DNF | 7 | Tom Dillmann | DIL | France | UOMO SUNOCO | TOYOTA RI4A | Yokohama | 21 | 45:58.422 | 13 laps | 1:31.170 |