Koppojutsu means to destroy the bone structure on the attacker. What specializes the Koto Ryu techniques is that distance is created by moving along with the attack, then moving forward with a strike and then move quickly out to a safe distance again. This is done to come in with a strike at exactly 90 degrees against the bone structure of the attacker to do the most damage. To do this demands good timing and rhythm in the defensive attack, often done with Yoko Aruki (moving with the legs crossing each other). Another important part of the footwork is to hit the attackers toki (the top of the foot), by  kicking or stepping on it to control his balance. 

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Because of the hard character of the Koto Ryu techniques it demands hard discipline training to harden the body. Takamatsu Toshitsugu started his training in Koto Ryu when he was nine years old, and was considered a Koto Ryu master when he was 13 years old. In his self biography he has written that he got hard fingers and toes by hitting stone and gravel until the blood came through the finger and toenails. Shako Ken (claw hand) is one of the strikes that is used in Koto Ryu. There are story's about Takamatsu Sensei in the 1960's when he convinced Koizume Shizuo, a journalist from the Tokyo Sport Newspaper, by literally drilling five holes through the bark of a tree with his Shako Ken finger strike. Koto Ryu also has an unusual way of using the katana. Koto Ryu is one of the very few Ryu that sometimes changes the grip of the sword by holding it with the left hand near the tsuka. This gives multiple ways of holding the sword with crossed arms that would totally confuse the attacker, and sometimes convince him that the stylist was an amateur and an easy opponent.

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Koto Ryu Sanpo Gassho (Three Treasures)

These are the same kuji that appear in the Gyokko Ryu.  The three treasures are listed as the Gassho Kuji Kiri (Nine Symblo Slashes Prayers).

 

Kongo - Cloud Prayer

Suirin - Water Ring Prayer

Kaku Gassho - Fire and Wind Prayer