He has authored a book Katori Shinto-ryu: Warrior Tradition as well as an earlier three-volume set of books on the tradition entitled, The Deity and the Sword: Katori Shinto-ryu.
Ōtake har skrivit boken Katori Shinto-ryu: Warrior Tradition liksom en tidigare trilogi om traditionen med titeln, The Deity and the Sword: Katori Shinto-ryu.