What was the name of the doctor in the Japanese warring states

Physician. Pronounced kusushi or yishi.

Or

Yakuza. Pronounced also kusushi.

Probably generally said kusushi. when writing an article, write physician or pharmacist.

There is a sentence in the ancient literature "Tulancho".

Yokitomo, tratsu ari. On the first point, there is a friend who is an object kurururu. The second is a physician (kusushi). The third is a friend with knowledge.

Translation; There are three kinds of good friends; those who give things, those who are physicians, and those who are wise.