@trapsarebetter
I'm pretty sure that regardless of race the average person can distinguish between individuals using only scent whether they realize it or not (like
@icekatze said), even between people they are around everyday. It's not some superhuman ability, and it's certainly not some mythical cultural phenomenon exclusive to glorious Nippon or racially exclusive to Asians in general.
@Meijin
Are you Indian? Who are "regular people" where you are because I genuinely can't believe that "[regular people] don't especially mind" if it's Indian BO specifically when that is definitely a special pungent odor. Arabian people are not much better with their own BO. Asians also have a pretty similar BO profile even though people try to perpetuate they have less BO or sweat less or whatever other nonsense. All races have a unique type of funk but some are more similar to others. If you happen to be Asian, a white person's BO probably stands out more to you since you're usually around people of a similar racial ancestry to yours on top of always being exposed to your own BO.
All of that being said body odor primarily comes from diet and eating habits, followed by genetics, race, and age (including things like oxidation) in that order.
That's why some body odors appear to correlate to race and why some are consistent across all races.
White people in general eat a shit-load of dairy, and dairy creates a very sour, sharp body odor over time. As an example, the French are known as stereotypically "stinky", and they just so happen to have a diet fairly high in cheese.
@SveNo
I'll give you slightly more generous body hair overall than maybe Asians, but that comes down to personal ancestry and genetics as well. Sticky earwax vs dry earwax is only half-true. Everyone's fresh-to-moderately-old earwax is wet/sticky.