Bought a tuned ecu from Japan
 

Hi all, I recently purchased a Veilside Data Rom tuned ecu for the VG30dett from Japan, the mods list matched mine and it had been tuned for a factory spec engine, but has modified fuel and ignition maps for more boost. What i neglected to think of before purchasing it was the different grade of fuel they have in Japan, so my question is does anyone no what octane premium gas is in japan.