The major differences of playing golf in Japan versus in the US are:
You will be greeted upon arrival and guided to the reception to check-in
Your clubs will be taken to your golf cart
The receptionist (similar to a hotel) will give you a numbered wallet and locker key - the wallet number will be used to charge everything you buy
You play the first 9 holes, take a lunch break, then play the second 9
Caddies must pass an exam before they can work
Caddies communicate with hand signals - may know general golf terms
After golf you take a bath in the club’s Onsen or hot spring bath, this may include an open area shower room where everyone walks around nude
Before leaving, you will turn in your wallet and key, and pay your charges