Some bits of information gathered from the internet, which I haven't seen in this thread yet. Personally I haven't done it at Tobita myself, but been there numerous times just to have a look, enjoy the ladies' attention, get called "irootoko" and have a bite to eat at the near shopping arcade. Also, the legendary "Ôsaka no Obâ-han" really shines at Tobita. I have lived in Akashi (Hyogo prefecture) for one year and did some construction work (plumber on working holiday visa), so my co-workers spoke mostly Kansai dialect which led to me picking up their speaking habits. As I don't have any Japan-connections now it's not a bother to speak different from standard Japanese.
Also, you should know that the current mayor of Osaka, Hashimoto Tôru, worked as a legal advisor for the Tobita restaurant association. At a press conference at the Foreign Correspondents Club of Japan in May 2013, he was asked by a journalist "While the name is restaurant association, every middleschooler in Osaka knows that you enter, pay money and have sex on the second floor. So if called a liar by this middleschooler, are you not ashamed as a politician to speak out such sophisms?". Hashimoto answered "Prostitution is illegal and will be punished by the persecutioning bodies. A restaurant association itself is not illegal" and "If it were illegal, the persecutioning bodies would go there and arrest them. That's all I have to say". You can find lots of photoshopped pictures on the internet, Hashimotos face with "go back to Tobita" or "Tobitas lawyer, Mr Hashimoto" on it. Also, if you speak to japanese people about Tobita they will know about Mr Hashimoto and the restaurant association, although the chances are pretty low that they have been there themselves.
So, the first site:
http://tobita.16machi.com
"An introduction to Tobita Shinchi"
The cutest girls are found on the Seishun-dôri, the first street running east-west, south of the shopping arcade Shinkaisuji-Shôtengai. The second street south of the shopping arcade is called Main-dôri. The prices are 20 min. 16K、30 min. 21K、45 min. 31K、 60 min. 41K . At the Ômon-dôri next south prices are cheaper, and the women are older. Some may call out "Onii-chan, 20 min. for 10K is fine!" You may also be able to haggle on rainy or cold days.
Of you have found a girl to your liking, enter immediately. She may be taken by another customer. The best time to select is between 5 and 6 p.m.
If you walk around for too long, the Yarite-Baba (old lady at the entrance) will have remembered your face and tell you to get in already, because you must have gotten tired. Unfortunately I don't know how to write this in English to make it resemble the Kansai-dialect written on the site.
The second site:
http://www.tobita-qjin.com
This is the official recruiting site of the Tobita restaurant association. Yes, that's where you apply if you want to work as a prostitute.
They advertise with high salary, 5000 Yen for 15 minutes of work. The prices listed are the same as above (may change during new years holiday, golden week and if the yarite-baba and the customer agree on a different price), but 1k will go to the yarite-baba and half of the remaining amount to the owner of the shop. For 60 min. the girl gets 20 k, for example.
Conditions: - the girl must be at least 20 years old, have common sense and able to use polite japanese
- must be genuine japanese (no foreign girls which have changed to japanese citizenship are accepted). I wonder if they count Okinawans or Ainu in?
- the girl has to produce some sort of identification, for example a passport, certificate of permanent residence etc.
Treatment of the girl:
- will be taken back home after work, if necessary by taxi (which will be paid by the restaurant)
- no taxes or social welfare fees will be withdrawn from her payment
- payment will be given full in cash on each day of work for the respective amount of work
- a trial day is possible ("kengaku"), even if it's just for one day
- working garment will be paid for by the restaurant
- basically there is a day shift and a night shift
- the girl can decide how much she wants to work, even one day per week is OK. No forced labor!
- Most shops have accomodation ready (one-room-apartment). Even if they don't have a room ready, just ask them.
And they will do everything do provide the girl with a comfortable working atmosphere. Don't you think about working there?
The Q&A is also interesting, but I'll save that for another day.