Caddie:  

Normally there's 1 caddie per each group. 

Lunch Breaks:

Golf courses in Japan do not allow "playing through" without a lunch break on throughout the year except playing in Hokkaido and Okinawa. 

Cart:

Most golf courses in Japan provide a cart shared with 5 people including caddie per group. When self-play, players need to manage the clf courses which still has not introduced golf carts.

Tips:

Tips for caddie is not necessary in Japan, however, tips will be surely appreciated.