중년의뇌, 247 페이지
일본 오키나와 사람들은 전통적으로 배를 80%만 채운다고 한다.

 hara hachi bu = 腹八分

腹八分目に医者いらず
はらはちぶんめにいしゃいらず
배를 8부만 채우면 병에 걸리지 않는다.

The Okinawan cultural habit of calorie control called hara hachi bu, which means eat only until you are 80% full, plays a role as well as their habit of eating an antioxidant rich plant-based diet.
http://okinawa-diet.com/okinawa_diet/hara_hachi_bu.html

(참고)

http://kotowaza.avaloky.com/pv_eat13_01.html