The Japanese single-seater series has been working on an overhaul of its current SF19 chassis all season, with this week's two-day test at Suzuka marking the first public outing for the new wings, sidepods, engine cover and floor series organisers hope will be used next year.
However, the question of who is paying for the upgrade remains unresolved, and some teams are thought to have expressed reservations about its implementation in 2023 in light of the current economic situation.
