http://www.katorishintoryu.jp/


Bibliografía
Ōtake Risuke, "Strategy and the Art of Peace", Nippon Budokan, 2016
Ōtake Risuke, "Katori Shintō-ryū: Warrior Tradition", Koryu Books, 2007
Ōtake Risuke, "The Deity and the Sword", Vol. 1-3, Japan Publications, 1977-1978


Documentales
BBC Documentary, "The Way of the Warrior", BBC, 1983