Takayama Hikokurō (高山 彦九郎) (15 June 1747 – 4 August 1793) was a Japanese samurai and historian, and one of the early proponents of the sonnō jōi movement which became highly influential during the Bakumatsu period in the events leading to them Meiji restoration. He was later known as one of "Three Excelling Men of the Kansei Period" (Kansei no san-kijin 寛政の三奇人). His Dharma name was Shōin Ihaku Koji (松陰以白居士).