Reigning champion Nojiri and Hirakawa were the clear class of the field in the first two races of 2022 earlier this month, with Impul Toyota driver Hirakawa taking victory in the first race ahead of his Mugen Honda rival before the positions were reversed in the second race.
It leaves Nojiri on 38 points, two points clear of Hirakawa in the standings by virtue of his bonus points for pole position for the second race.
