Tsuboi set the third-fastest time of the opening day of the test on Saturday and overall in the #36 TOM'S Toyota he shares with Ritomo Miyata, lapping within two tenths of the pace set by ARTA Honda's Nirei Fukuzumi.
However, during the 10 minutes of GT500-only running in which most teams performed qualifying simulations on Saturday afternoon, the top GR Supra was the SARD machine in eighth place, with the #36 car only managing 12th.
