He has qualifications of a producer, he's produced several successful photobooks already, that requires some enterpreneurship and know-how. And it's not like he's bragging or anything, "I am her producer" is an apt way to explain why he's involved in any of this. And even then I think it is mostly Sumire who introduces him as such.If I met a teenager calling themselves a "producer" or an "entrepreneur" or a "crypto investor" I'd assume they're full of shit.