Noriyaro released a video a couple weeks back. Iza-san’s Leopard (as well as Dai-kun and Sugiyama-san) was drifting one of the tracks up north.
Iza-san invited me to come during that day, but I was in Shizuoka with my family and with Tetsuya and Sano-kun.
2 Days later, I was in Utsunomiya meeting with Iza-san.
Alexi posted the video and there is some good information (outside of F31 stuff) on license plates and numbering.