Sho Tsuboi set the pace in the closing moments of the morning session that was disrupted by no fewer than five red flags at the wheel of Cerumo's #14 car, setting a best time of 1m18.123s and leading a Toyota 1-2 ahead of TOM'S driver Yuhi Sekiguchi.
That turned out to be the day's quickest time, as Hiroaki Ishiura's best effort in the afternoon session of 1m18.193s in the sister #38 machine fell just 0.070s short.
However, Bertrand Baguette's Saturday benchmark of 1m17.850s, set at the wheel of the Real Racing Honda NSX-GT, was not bettered.
Sekiguchi's time in the #36 TOM'S Supra in the morning session was good enough for third overall behind the two Cerumo-run cars, with Baguette once again finishing up as top Honda driver in the #17 machine, just a further 0.007s back.
#19 WedsSport ADVAN GR Supra with crash damage
Kunimoto was taken to the medical centre as a precaution but escaped injury.
In GT300, the Cars Dream Tokai28 Lotus Evora MC of Hiroki Katoh set the pace overall with a best effort of 1m25.595s in the morning session.
Second overall was the quickest car in the afternoon, the works-entered Subaru BRZ R&D Sport on a 1m25.773s, followed by the #31 apr Toyota Prius PHV GR Sport, the Team Hitotsuyama Audi R8 LMS and the Tomei Sports Nissan GT-R NISMO GT3.
GT500 test results:
|1||14||Cerumo Toyota|| |
|2||38||Cerumo Toyota|| |
|3||36||TOM'S Toyota|| |
|4||17||Real Honda|| |
|5||23||NISMO Nissan|| |
|6||8||ARTA Honda|| |
|7||100||Kunimitsu Honda|| |
|8||12||Impul Nissan|| |
|9||39||SARD Toyota|| |
|10||24||Kondo Nissan|| |
|11||3||B-Max Nissan|| |
|12||64||Nakajima Honda|| |
|13||37||TOM'S Toyota|| |
|14||230||Nissan test car||-||Y||1'22.144||1'19.746|
|15||16||Mugen Honda|| |
|16||19||Bandoh Toyota|| |
Tyre key: B = Bridgestone, D = Dunlop, M = Michelin, Y = Yokohama