There has been data ("誰も教えてくれない「風俗」商売の始め方・儲け方―開業の手続きから運営、従業員の教育、トラブル対策まで") available for this ISBN from the data sources that books-by-isbn.com uses, but not on the latest request on Tue Dec 24 13:06:56 2019, so the data displayed here has been removed .