During the Sengoku Period (period of warring states), Kosho took charge of secretarial affairs, in particular acting as a human shield to protect their lord at the risk of losing their own lives; for this reason, Kosho had to not only be knowledgeable and have impeccable manners, but also be skilled in the military arts.
戦国時代(日本)には、主に秘書的役割もこなし、特に主君の盾として命を捨てて守る役目が大きかったため、幅広い知識と一流の作法と武芸を身につけていなくては務まるものではなかった。