"Fuzoku, young, Urawa" — some people hear that and know exactly what it means, and some don't.
I'm 42 and still out walking these floors myself, so I'll lay it out from a real-world point of view.
Why this topic matters
Information about fuzoku — Japan's licensed adult-entertainment business — is surprisingly badly organized. Beginners especially often don't even know where to start looking.
What this actually means
In a word: knowing or not knowing changes the quality of the experience.
What's written here is the essence of the knowledge I've built up over 20 years.
In closing
If you've got questions about this, drop a comment or hit me on social. And check out First Class Ruby while you're at it.