noun
chivalry; heroism; righteous courage
Refers to a spirit of moral courage and loyalty, often associated with samurai ideals. Somewhat literary and not an everyday word.
彼の行動には義気があふれていた。
His actions were full of chivalrous spirit.
義気に厚い人物として知られている。
He is known as a person of strong righteous courage.
Compound of 義 (righteousness) and 気 (spirit). The exact historical derivation is uncertain, but the word has been used in literary contexts to describe a chivalrous or heroic spirit.