Originally Posted by
veganbikes
Why would it have to be "Asian/Japanese" people specifically? A good deal of cycling apparel is made for generally skinnier folks and less so for people of average body size or above.
You should direct this question to those who produce and size the clothing.
It is well established that some clothing sizing is labeled 'asian', 'euro', and 'american'. Also, it is common for brands to explain that an American should size up and select XXL instead of L, for example.
Reality is that we aren't all the same. It is nice that this is recognized and specifics are listed when considering clothing you cant try on in person before ordering.