In the far past, say <2000 TH and BKK was inundated with young+willing JPNese bekpekkers. Shy as they could not speak any english but once over the threshold and behind firmly locked doors hot as hell or even hotter as Thai wheather. And just for fun. They seem to have completely disappeared-as they also seem to have gone from Europe.
What always struck me-and again a little bit when seeing these face-pix is that so many appear to me as ´look kreung´ in Thai: half childs (farang father, local mother), so this should either indicate discrimination (where ASEAN in general and JPn in particular is famous for). Or perhaps its they were gifted by their fathers with, ahum, bigger tools?