IMO Japan has yet to create a real super car of their own (assuming that bugatti/lambos are THE benchmark of super cars). NSX doesn't count. NSX was just a reliable, refined, and over-engineered sports car that woke up ferrari and others from complacency.
It's only USA and europe throwing that term around. GT and sports cars from Nissan/honda/Mazda in late 80s/early 90s happen to meet or exceed performance of expensive euro/US cars on track.
In fact japan banned production/advertisement of japanese cars with mreo than 276hp. Tuner shops opened in japan and spread to US as the result of that hp cap. J.D.M. experts would likely tell you that engines in Supra, 300zx, and Skyline GT-R are designed to handle more than 400+ but only produce HALF of that because of gov restrictions (lol).
That ban was lifted in early 2000s.