As the last four races in the series, from 2nd to 5th round, had been run on the 450km-long format, R-6 this time around is to be on the standard distance of the series, that is to say a 300km-long race, in which all participants are required to make at least one stop in the race.

It began raining just before qualifying sessions and the track surface was turned into wet condition for once, however, the rain seized when the Q1 session for GT500 was about to start and the tarmac was quickly drying. Even though the wet-race declaration was still in effect, all cars went out on slick tires for time attack. In the difficult condition, #17 Astemo NSX-GT (Koudai Tsukakoshi) marked the 3rd fastest time and #8 ARTA MUGEN NSX-GT (Tomoki Nojiri) the 6th fastest, both proceeded to Q2.

In the Q2 session, Toshiki Oyu driving #8 ARTA MUGEN NSX-GT set the new course record and duly achieved the back-to-back pole position for NSX-GT following #16 ARTA MUGEN NSX-GT on R-5 at the hand of Nirei Fukuzumi. #17 Astemo NSX-GT (Nobuharu Matsushita) came in for the 3rd grid to start the race on Sunday.

On 17th Sunday afternoon, the race started under overcast skies, and #8 ARTA MUGEN NSX-GT (Nojiri) launching from pole position dived first into Turn-1 and then gradually began to pull away the pack led by #17 Astemo NSX-GT (Matsushita).

#8 ARTA MUGEN NSX-GT (Nojiri) was pitted right after L-32, refueling and driver/tire change were smoothly done. A lap later, however, #17 Astemo NSX-GT (Tsukakoshi) made its stop swiftly enough to return the track ahead of #8 ARTA MUGEN NSX-GT (Oyu), successfully took over the leading position.

On Lap-37, #100 STANLEY NSX-GT (Naoki Yamamoto) suffered a huge crash after colliding with a GT300 car at the exit of the last turn, and the race was immediately red-flagged. Both #39 GR Supra and #1 Z running 1st and 2nd at this point were yet to finish the mandatory stop, therfore, #17 Astemo NSX-GT (Tsukakoshi) and #8 ARTA MUGEN NSX-GT (Oyu) were deemed as the virtual 1st and 2nd respectively.

The race was restarted after the wreck of the accident was cleaned up, and #17 Astemo NSX-GT (Tsukakoshi) led the field with #8 ARTA MUGEN NSX-GT (Oyu) following right behind. On Lap-52, #8 ARTA MUGEN NSX-GT (Oyu) closed in on #17 Astemo NSX-GT (Tsukakoshi) and resumed the top position yet again.

#8 ARTA MUGEN NSX-GT (Oyu) seemed to be outrunning #17 Astemo NSX-GT (Tsukakoshi) for a while, however, the gap began shrinking later on Lap-65 or so as the temperatures both ambient and track surface were going down, and soon the two cars settled into a close 1-2 formation. On Lap-77, at the home straight, #17 Astemo NSX-GT (Tsukakoshi) run side by side with #8 ARTA MUGEN NSX-GT (Oyu), and simply passed the consort car into Turn-1 to get the top slot back in hands.

#8 ARTA MUGEN NSX-GT (Oyu), now in 2nd, looked a bit stagnated thereafter allowing #23 Z, the immediate pursuer, to catch up rather quickly albeit with the minimum safety margin. #17 Astemo NSX-GT (Tsukakoshi) maintained top position in the rest of the 84-lap race and received the first checkered flag, however, the post race scrutineering revealed its skid plate being fallen short in thickness due to excessive wear, and thus the #17 car was eliminated from the provisional results. By this ruling, #8 ARTA MUGEN NSX-GT (Nojiri/Oyu) was moved up to the winner of the race. For Oyu, this is his maiden victory in the GT500-class.

The next race will be held at Autopolis (Oita Pref.) on October 14 (Sat) and 15 (Sun).