expression, noun
universal brotherhood; all the world under one roof
A yojijukugo originally meaning 'the whole world as one family', but strongly associated with WWII-era Japanese expansionist ideology. In modern contexts, it is often discussed historically or critically.
「八紘一宇」は戦時中のスローガンとして使われた。
"Hakkou ichiu" was used as a slogan during the war.
八紘一宇 was originally a phrase expressing an ideal of world peace.