If you don't care about a woman being older and not a super model, Putit Royal is a soapland thats very foreigner friendly, the women are very skilled (lots of experience) and the price is only 30.000 for two hours.
For oppai pubs, you need to speak some basic Japanese actually, or they may not let you in. "Pretty Getter" in Shinjuku seems to be a popular one. In Shinjuku there is also "New Hot Point" where you watch a striptease first, then you get a quick blowjob or handjob from the girl, very Japanese experience.
Again, if you dont care about the way the girl who gives you service looks, and you like cheap, pink salons (places where you get a blowjob in a room with other people sitting there) is also a very Japanese experience.
If you want something less unique, there are some escort agencies that can send girls to your hotel (or meet at a Japanese love hotel, also an interesting experience). Some of these agencies provide FS but a lot of them dont because its not ok to advertise that in Japan. Agencies where you dont need any Japanese to book a girl are Asian Mystique, Nasty Dolls and this (no FS but young and good looking girls).
There is also an independent escort here on TAG called Manami, who gives really mind blowing service with Japanese hospitality. Prices not cheap but shortest course may fit your budget.
If you search the names of the places i've mentioned here in the search engine, you'll find a lot of reviews so then you know what you need to get in and what kind of experience to expect and you can choose.