Super important thing to consider. Shotaro actually has pockets sewn into all of his waistcoats/vests for the damn Gaia Memories. Did he sew them in himself or did he have to find a way of explaining what he needed to a tailor?
I really love the idea that Shoutarou is handy with a needle and thread, tbh. He’s a lot more resourceful than most people give him credit for, and he seems like he’s used to having to work things out on his own (or later for Philip).
See: his coffee, which is terrible, and likely picked up on the fly. XP Sewing is a little less forgiving than taste buds, imho. It either works or it fails, so getting pretty good through trial and error kind of suits him in this case…
Of course all that’s just conjecture, but Shou just seems like the type of guy that has random little urban survival skills like this.
#Shoutarou has a little sewing kit behind the desk for when he rips off one of the belts on the back of his vests during a chase#along with replacements and random clip-things for Philip#He occasionally sews on different-coloured cuffs on Philip’s shirt sleeves to make them longer