Hara Hachibu-ni Isha Irazu (はらはちぶにいしゃいらず)
[vocaburary]
hara: the abdomen; the belly; the bowels; the stomach; a heart; spirit; guts.
hachibu: 80%
isha: doctors
irazu: you don’t need …
<word-by-word translation>
You don’t need doctors if you don’t eat more than you need to.
<transaltion>
Temperance is the best physic [medicine]. or
Feed by measure and defy the physician.