Higisho is a kind of ordeal believed as God's judgment conducted in Japan during the medieval period and modern times, also being referred to as Tekka (red-hot iron) or Kasei (oath of fire).
火起請（ひぎしょう）とは、中世・近世の日本で行われた神判の一種で、鉄火（てっか）・火誓（かせい）とも称する。