noun
lion-hearted general; fierce general
A figurative term for a brave, fierce, or demon-like military commander. Often used in historical or dramatic contexts.
彼は戦場で鬼将軍と呼ばれていた。
He was called the lion-hearted general on the battlefield.
Compound of 鬼 (oni, 'demon') and 将軍 (shōgun, 'general'). The exact historical derivation is uncertain; the term is conventionally associated with a fierce, demon-like commander.