Kumagai no Jirō Naozane (熊谷 次郎 直実) (March 24, 1141 – September 27, 1207/October 25, 1208) was a famous soldier who served the Genji (Minamoto) clan during the Heian period and Kamakura era of Japanese medieval history. Kumagai is particularly known for his exploits during the Genpei War, specifically for killing the young warrior Taira no Atsumori at the battle of Ichi-no-tani in 1184.[2] Later in life he became a Jōdo-shū Buddhist priest, as a disciple of Hōnen. Atsumori's death and the circumstances surrounding it went on to be fictionalized and retold in numerous forms, including the Heike Monogatari epic, a number of Noh plays, and in the jōruri and kabuki theatres as well.