| 1 | Okayama GT
300 km | 
Schedule changes- On March 4, 2017, Suzuka Circuit, the Stéphane Ratel Organisation, and the GT Association announced that the Suzuka 1000km would become the Suzuka 10 Hours from 2018, and moves to the Intercontinental GT Challenge. The Super GT championship round at Suzuka moves to May 19–20 and will be a 300km race, as it was from 1995 to 2010.
- To replace the Suzuka 1000km as the series' endurance round, the Fuji GT 300km, held in early August, was lengthened to a 500 mile race. The Fuji 500 Mile Race was originally held from 1977 to 1992.
- The race at Buriram United International Circuit in Thailand was moved from the seventh to the fourth round of the championship, on June 30 – July 1.
- The race at Sportsland Sugo was moved from the fourth to the sixth round of the championship, on September 15–16.
- The race at Autopolis was moved from the third to the seventh round of the championship, on October 20–21.
Teams and driversGT300| Team | Make | Car | Engine | | Drivers | Tyre | Rounds |
Vehicle ChangesGT300- Panther Team Thailand switched from the Dome-built Toyota 86 MC to the Lexus RC F GT3.
- GAINER switched to a full-on effort with Nissan, fielding two brand-new 2018 Nissan GT-R NISMO GT3s.
- Arnage Racing separated from INGING Motorsport after one season, and also switch vehicles to the Mercedes-AMG GT3.
Entrant changesGT500Honda:
- * 2009 Formula 1 World Champion Jenson Button, who made his series debut with Team Mugen at the 2017 Suzuka 1000km, will run full-time with Honda and Team Kunimitsu in 2018.
- * Takuya Izawa moves from Team Kunimitsu to Autobacs Racing Team Aguri, replacing Takashi Kobayashi.Toyota:
- *Former F1, and current WEC and Super Formula driver Kamui Kobayashi will make his full-time GT500 debut with Lexus Team SARD
- *James Rossiter stepped away from full-time Super GT racing in 2018, but will continue to race in Japan in the Super Formula championship. Yuhi Sekiguchi replaces Rossiter at Lexus Team au TOM's
- * Toyota young driver Kenta Yamashita moves up to GT500 full-time with Lexus Team WedsSport BANDOH, replacing Sekiguchi.
- * Formula E standout Felix Rosenqvist will make his Super GT debut in the GT500 class for Lexus Team Wako's LeMans. Replaces Andrea Caldarelli who confirmed that he would leave Toyota and Super GT this season, focusing solely on his commitments as a factory driver at Lamborghini Squadra Corse.Nissan:
- *Reigning All-Japan Formula 3 Champion Mitsunori Takaboshi steps up to GT500 full-time with Kondo Racing, replacing Daiki Sasaki, who moves over to Team Impul to drive the Calsonic GT-R.
- * NDDP Racing moved up to the GT500 class for 2018, entering as NDDP Racing with B-Max. They take the place of MOLA, who withdrew from the series at the end of 2017. Satoshi Motoyama and Katsumasa Chiyo stays to the new team.
GT300- Former GT500 driver Hironobu Yasuda and two-time GT300 champion Kazuki Hoshino move to Gainer, from Team Impul and NDDP Racing respectively, to drive their new Nissan GT-R NISMO GT3s.
- Takashi Kobayashi moves to Team UpGarage, replacing Shintaro Kawabata.
- VivaC Team Tsuchiya reverted to their original name, Tsuchiya Engineering, following the withdrawal of their title sponsor VivaC. Toyota young driver Sho Tsuboi will replace Kenta Yamashita at Tsuchiya Engineering.
- Akira Iida will step away from full-time driving duties, and became team director of the #60 LM Corsa Lexus RC F GT3. Two-time FIA F4 Japanese Champion Ritomo Miyata makes his series debut with LM Corsa.
- The #51 LM Corsa Lexus RC F GT3 changes its number to #96, and has a new title sponsor in Okayama Toyopet / K-Tunes Racing. The team will be officially known as K-Tunes Racing LM Corsa from 2018. Three-time GT300 champion Morio Nitta moves to K-Tunes LM Corsa Lexus RC F GT3 to replace Sho Tsuboi.
- Jono Lester was released from Pacific with Gulf Racing after the 2017 season, and will not return to Super GT in 2018. Pacific with Gulf Racing recruit Rintaro Kubo from apr, and Keishi Ishikawa who moves from Rn-sports. Kyosuke Mineo become the third driver.
- Two-time GT500 champion Kohei Hirate moves out of GT500 to drive the #31 Toyota Prius for apr Racing. And two-time GT300 champion Manabu Orido joined apr Racing midseason to replace Kota Sasaki.
- Drago Corse, who competed from 2015 to 2016 as Drago Modulo Honda Racing, return to the series in GT300 with another Honda NSX GT3. They will be known as Modulo Drago Corse. 2000 GT500 Champion Ryō Michigami returns to the series as a full-time driver owner, after racing in the World Touring Car Championship in 2017. Former All-Japan Formula 3 race winner Hiroki Otsu makes his series debut with Modulo Drago Corse.
- FIA F4 Japanese graduate Yuya Hiraki makes his series debut with Team Mach, replacing Kiyoto Fujinami as Natsu Sakaguchi's co-driver.
- Audi Team Hitotsuyama recruit Ryuichiro Tomita to replace Masataka Yanagida
- Masaki Kano and Hideto Yasuoka both return to the series with Arnage Racing.
- CarGuy Racing makes their Super GT debut with the all-new Honda NSX GT3. They previously competed in the Super Taikyu Series and Blancpain GT Series Asia. Gentleman racer Takeshi Kimura makes his series debut with CarGuy Racing. Naoki Yokomizo, the 2012 GT300 Champion, returns after a year-long hiatus to drive for the new CarGuy Racing team.
- BMW Team Studie, the 2011 GT300 class Champion announced in January that they would switch to the Blancpain GT Series Asia GT4 category, and suspended operations in Super GT for the foreseeable future.
- Bentley factory driver Jules Gounon makes his Super GT debut in a one-off for EIcars Bentley at the Fuji 500-mile race.
Results| Round | Circuit | Date | Class | Pole position | Race winner | | 1 |
Championship standingsDrivers' championships;Scoring system
| Position | 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th | 9th | 10th | Pole | | Points | 20 | 15 | 11 | 8 | 6 | 5 | 4 | 3 | 2 | 1 | 1 | | Fuji 500 mile | 25 | 18 | 13 | 10 | 8 | 6 | 5 | 4 | 3 | 2 | 1 |
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