"Historical kana usage", a prescriptive method of using kana to write Japanese. Devised in the Edo period by Keichū (契沖) and taught in schools until 1946, it aims to be etymologically faithful and reflects earlier stages of the language (Heian period and earlier).

revisionism

upper teeth

Shimeji mushroom

the diagram above; the top illustration

culture medium

Kyūjitai form of 地区: zone (area distinguished on the basis of a particular characteristic etc)

(ecology) habitat

(as a) matter of fact; actually; in reality; de facto

(military) a high-ranking general (officer) or commander / (military) Clipping of 上将軍 (jōshōgun, “shogun-in-chief”).