Last time when I went Japan on AAX promo ticket also got these local backpacker looking type.
They loaded their backpack plus another backpack, if AAX strict, sure need to pay extra luggage.

These are the ones that bring bad names, most likely book Airbnb write 2 adults, but later check in with 4adult 1 kid.
Never buy travel insurance if got any problem that time got into medical emergency or accident then upcar consulate need to come in to help.