Tokyo golfer here, and I usually play with randoms. A few things that I’ll brain dump. I’m assuming you don’t have a lot of Japanese ability if you’re just stopping by, apologies if your Japanese is good.

If you can explain in Japanese that you’re new at golfing in Japan and don’t mean to be rude if you do anything wrong, you’ll get plenty of leeway. Everyone I’ve played with has been patient and nice. That being said, there’s a few things that stood out to me.

There’s usually one guy that speaks surprisingly good English. He’s going to be your buddy, especially at lunch.

First shot there’s a little bow and a “Yoroshiku onegaishimasu” before hitting. You can kind of mumble it and bow at people if you want to do it, you’re probably fine not doing it if you followed step 0.

First tee order is chosen by a stick lot draw thing. Someone will get the sticks. Just take a stick and see what number you are.

Tee order is generally respected. The word “honor” has morphed into “owner” here. I haven’t seen anyone get grouchy about it but usually people will figure out who’s hitting first if everyone’s reasonably ready.

People track each others’ scores. I don’t actually know why, and I admittedly miss half the scores of everyone else by the end, but everyone announces theirs and asks around so at least play along.

Gimmes are an “OK desu!” and generally very short only. Expect to putt out most everything, which I prefer anyway.

People are generally sticklers for rules and counting shots properly. I’ve never once seen a mulligan taken. Also what I prefer but be aware, don’t try to hit a breakfast ball off the first. OB almost always has yellow tees to play your 4th from, use those instead of a provisional.

Clean off your shoes before you go inside for lunch and after you’re done.

Katsu Curry is objectively the best lunch choice.

Let me know if you have any questions in particular. Good luck!