Okayama International Circuit 2018 Race Calendar
| Date | Racing Series | Round | Event Name |
|---|---|---|---|
| July 28 - July 29 | Mini Challenge Japan Finished | Round 4 | |
| September 8 - September 9 | Super Formula Finished | Round 6 | |
| October 14 - October 14 | Lotus Cup Japan Finished | Round 5 |