(sometimes offensive) part of Japan adjacent to Sea of Japan

(dated) part of Japan adjacent to Pacific Ocean and Seto Inland Sea

Japanese mint (Mentha canadensis)

Kyūjitai form of 日本学: Japanology

(oceanography) Synonym of 黒潮: the Kuroshio Current

(military, historical) 大日本帝国海軍 / (military) 海上自衛隊

(military, historical) 大日本帝国陸軍 / (military) 陸上自衛隊

"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).

biocentrism (cosmological theory)

Synonym of 地動説 (chidōsetsu, “heliocentrism”)