Fueiho (風営法) — Japan's Adult Entertainment Business Law — is the regulation that governs hostess bars, host clubs, girl's bars, nightclubs, and even game centers operating after dark. Contrary to common assumptions, it has nothing to do with the sex industry: its purpose is to ensure that legitimate entertainment businesses operate safely, ethically, and within defined limits. Those limits cover what staff can do, when venues must close, and which establishments are authorised to open at all. Understanding Fueiho is the difference between choosing a venue that operates within the law and walking into one that does not — a distinction that matters both for customers and for anyone considering working in the industry.