I've seen Osaka Girls listed on Acemassage but not visited.
I did try an Acemassage place off the Cambridge rd (opposite homebase)
It was a very plain and unresponsive old Chinese nag from what I remember.
Also kept me hanging around in a residential cul de sac which made me feel very exposed.
I'm pretty sure these places change their 'girls' very regularly so you might strike lucky, but then probably won't be able to repeat if you find one you like.
I also tried an Ace place in Epson, which felt dodgy and very pimped. I don't think actually trafficed. There was only one lady there, but she didn't speak a word of English.
Tried another Ace place in central Kingston. A young Chinese girl, but a reluctant timewaster.
I have an Asian fetish and it's a good location for me, but so far I've been put off these places from my limited experiences.
The only Asian recommendation I can make in the area is
Hot Sissy https://www.adultwork.com/1209614
but I'd love to have another source of Asians if you get lucky.