The Battle of Shigisan (信貴山 Mount Shigi), (sometimes misspelled as Battle of Shigisen), Teibi no Ran (丁未の乱), Teibi no Hen (丁未の変), Teibi no Eki (丁未の役), or Mononobe no Moriya no Hen (物部守屋の変) was a battle fought in 587 between Soga no Umako and Mononobe no Moriya at the riverside of the Ekagawa (餌香川) river in Kawachi Province, Japan near Mount Shigi. The battle practically exterminated the Mononobe clan, the most powerful opponent of Buddhism.[1][2][3][4]