kunai knife

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The kunai, a possible derivative of the masonry trowel, is a versatile Japanese tool with two main variations - short and large versions. Whilst it primarily serves as a farming tool, in skilled hands, it transforms into a multifunctional weapon. The ninja employed it for wall-gouging purposes, and its widespread use in manga and ninjutsu demonstrates its popularity among fictional characters, who often wield it as both primary and secondary weapons.