(historical) province (first-level administrative divisions of Japan from 7th Century to 1868)

system; institution

politics

part, portion / copy of a newspaper or book

system, organization

State of Japan (de facto official name of Japan, 1947 to present)

(rare) State of Japan (de facto official name of Japan, 1947 to present)

a land, a large place / a country in general, a region / a country as in a nation, a state / the office of emperor, the crown; affairs of state / a province of ancient Japan

system

(archaic) antique, old-fashioned / (colloquial) ancient