"Men's nightwork in Koshigaya, side gig" — some people hear that phrase and immediately get it, and some don't.
I'm 42 and still out walking these streets myself, so I'm going to lay this out from a real-world point of view.
Why this topic matters
Information about fuzoku (Japan's licensed adult-entertainment business) is surprisingly poorly organized. Beginners especially tend to have no idea where to even start looking.
What this actually means
In a word: whether you know it or not is what changes the quality of the experience.
What you're reading here is the essence of the knowledge I've built up over 20 years.
Final word
If you've got questions about this topic, hit me in the comments or on social. And check out First Class Ruby while you're at it.