What an expensive dinner companion... Wow Indeed....
I'm not Japanese, but I live in Japan, and I know for a fact it's not uncommon for these people to spend STUPID amounts of money for "personal entertainment" of that sort. -- I've stopped in a few "massage" joints here myself, and was quoted some prices that actually made me laugh. (I don't think the management appreciated that much, I might add...lol) Needless to say, I didn't partake...
I did have a buddy of mine once that wanted to stop in a BJ Bar after a night of boozing it up. He wanted me to come with him, but I told him I wasn't about to pay stupid money like that. He said he'd pay my way though, so he talked me into it. So, for 8000 Yen, which was well over 75 US Dollars at the time, I was treated to a condom covered BJ... The girl was cute, had a great body, but knew little to nothing about oral technique and skills. (That, and I guess she was used to Japanese men and smaller, ummm, tools...) I endured my 30 minute time limit, and having no happy ending still yet, I gave up...