Tsuboi, who stays at Inging for a fourth season this year after a disastrous 2021 campaign, posted his best lap of the day of 1m35.470s during the two-hour morning session, beating reigning champion Tomoki Nojiri by 0.060s.
That benchmark was some way underneath both of the pole times set during last year’s two Suzuka rounds, and more than half a second faster than the equivalent time in last December’s post-season test at the Japanese Grand Prix venue.
Ideal track conditions after two days of SUPER GT testing and the Suzuka Fan Thanks Day event, plus a strong tailwind on a cool, overcast day may explain the major improvement in laptimes.
Behind Mugen driver Nojiri, Hiroki Otsu was third-quickest for his new team Dandelion Racing, a little under two tenths off the pace set by Tsuboi.
Sacha Fenestraz was fourth-fastest aboard his new-look Kondo Racing machine, followed by Yuhi Sekiguchi (Impul) and Tadasuke Makino (Dandelion), making it three cars inside the top six each for…
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