Okayama International Circuit 2015 Race Calendar
| Date | Racing Series | Round | Event Name |
|---|---|---|---|
| April 3 - April 5 | PCCJ - Porsche Carrera Cup Japan Finished | R01 & R02 | 2015 Autobacs Super GT Round1 Okayama GT 300km Race |
| April 4 - April 5 | F4 Japanese Championship Finished | R1/R2 | 2015 Autobacs Super GT Round1 Okayama GT 300km Race |
| May 23 - May 24 | Super Formula Finished | Round 2 | |
| September 5 - September 6 | Super Taikyu Series Finished | Round 5 | |
| October 10 - October 11 | LSTA - Lamborghini Super Trofeo Asia Finished | Round 5 |