Japan's premier single-seater category came in for criticism after last month's Motegi race, which ran to a shortened 35-lap distance with no pitstop, leading to processional racing and little in the way of on-track action after the opening lap.
In the run-up to last weekend's second round of the season at Okayama, series organiser JRP announced that the mandatory tyre change would return, albeit not refuelling.
The result was a much more eventful race at the former Pacific Grand Prix venue, which featured a range of strategies and a number of passes towards the head of the field - most notably Sho Tsuboi's race-winning move on teammate Hiroaki Ishiura.
Hiroaki Ishiura, Inging, Sho Tsuboi, Inging
Reigning champion Nick Cassidy was one of the most strident critics of the Motegi race, but at Okayama he praised JRP for its quick reaction to the situation.
"It provided something for the fans, it made it more exciting," Cassidy, who finished third behind Tsuboi and Ishiura, told Motorsport.com.
"At the start of the race Ishiura was faster than me, but I was flat-out, not saving tyres. And at the end I was flat-out [trying to build a gap over Tsuboi].
"If you only consider the people that stopped around lap 10, I guess there wasn’t so much action, so that’s what it would have been like [without a pitstop]."