Ah yes the old jap girl search, they are top of my hotlist and I'm always on the lookout. I can assure you they are rare and 90% of those that claim to be Japanese are intact Chinese or Korean ect.
Since the start of 2015, there are no Jap girls of note in London that Iv come across on AW. There was a few last year but they've just disappeared. Iv gone to agencies and punted stupid money on so called jap girls who in fact are South Koren pretenders. This year Iv only come across 3. One of those was ify at best.
Only time this year that i found the a Jap lass was a company called Paddington Asians or something, even then she turned out to be a fraud as she couldn't tell my basic info about her homeland and her Japanese was ify.
They do turn up at massage parlours though. Yes, genuine jap girls can be found randomly, I was shown one in Hull earlier this year. Some sort of parlour, found another genuine one in a parlour in Southampton.
On AW, there are loads that claim to be Japanese but are not.