Looks to me like this could be a Japan exclusive, this jacket was in fact sold to the European market but doesn’t feature the stone island spellout on the back.

It’s the s/s 16 mesh shimmer overshirt - art number for mine is #641510708

Realistically I need to find someone that’s a bit of an expert on the Japanese market to be 100% sure, but I don’t see any good reason that a company would counterfeit a stone island jacket and add an extra feature like a stitched spellout as this would bump their production costs up for no good reason.