noun
strategist; tactician; schemer
Refers to a military advisor or strategist in historical contexts, and by extension a clever planner or schemer in modern usage.
彼は会社の軍師と呼ばれている。
He is called the company's strategist.
戦国時代の軍師は、戦の計画を立てた。
Strategists in the Warring States period devised battle plans.