To the Asuka clothing thing (bday anon here) hear me out but it'd be really bittersweet if what he had was altered clothing from his Gear Project days since it wouldn't be out of the question for him to pack up his own belongings. Coat is definitely custom but his Hakama + covering could just be an altered lab coat and old family-given outfit. He seems like a nifty guy. I mean he makes noodles with that goofy ass machine.