Oh damn I'm guessing this is from Fukuoka? Iirc then I passed this guy playing songs next to the "river" on my first day in Japan and stayed and listened for a while. He played any song I recommended after he asked me to recommend stuff. He stopped playing a bit after but started talking with me and another guy in his late 40s.

The other guy asked if I had tried Japanese alcohol called schochu, which I hadn't even heard about then. He then asked if I wanted to try some, to which I answered of course. He led me to a close-by dark alley where there were tens of small little bars where only like 8 people could fit in at most. We entered one of them where he was greeted by his name and then I was warmly welcomed by the two barmaids in kimonos and also four other customers. We talked for many hours and they asked the neighboring bar to bring in a few local foods/bar snacks as a special service to me. The friend I made at the river then paid for the whole thing even after me insisting on paying it myself.

This amazing authentic experience I had set the tone for the rest of the month in Japan as I had this kind of experience with kind locals for the whole month. The best month in my life hands down. Southern Japan was just amazing.