朱

red lips and pearly white teeth (said of beautiful women)

scarlet ibis (Eudocimus ruber)

Idiomatic expression

great wealth; very wealthy person

Historical term

foreign trade by authorized Japanese ships (early Edo period)

Rare term

vermilion tray

Rare term

neo-Confucianism (based on the teaching of the Cheng brothers and Zhu Xi)

Rare term

to make corrections

Idiomatic expression; Rare term

to be flushed bright red (with anger or embarrassment)

drawing red lines

Historical term

red lines on maps marking town limits (Edo period)

Archaic

red lines marking nouns in kanbun texts

red seal ship; shogunate-licensed trading ship