14/05/2026
An article by Sean Askew below:
Before Koto Ryū, There Is Gyokko Ryū
To truly understand and practice Koto Ryū Koppōjutsu correctly, one must first develop a strong foundation in Gyokko Ryū Kosshijutsu.
Koto Ryū is often seen as direct, powerful, sharp, and destructive. Its feeling is different from Gyokko Ryū, yet it is not separate from it. Koto Ryū is complementary to Gyokko Ryū and in many ways Gyokko Ryū can be seen as the mother school that gives Koto Ryū its deeper structure, distance, timing, and body method.
Before one can properly express the hard, percussive, feeling of Koto Ryū, one must first understand the evasive, circular, spacious, and strategic feeling of Gyokko Ryū.
For this reason, it is worth looking carefully at the very first kata of Gyokko Ryū:
Kokū 虚空
The word Kokū means “empty space,” “vast space,” or “the open void.” It is not simply “nothingness.” It is the space in which movement appears. It is the emptiness that receives, transforms, and gives birth to action.
This same word kokū appears in Kokūzō Bosatsu 虚空蔵菩薩, the Bodhisattva of the Treasury of Space, who is connected in Japanese esoteric Buddhism with wisdom, memory, insight, and the vast storehouse of awakened understanding. Whether or not the kata name was intended as a direct religious reference, the obvious symbolism is powerful.
Gyokko Ryū begins with Kokū because the first lesson is space.
Do not clash. Do not meet force with force. Do not stand where the enemy expects you to be.
The attacker enters, but you become empty to his attack. You remove the target, shift the angle, control the distance, and allow the counter to arise from the space he has created.
This is not passive emptiness. This is active emptiness.
It is the void that produces technique. It is the opening that becomes a trap.
It is the space where the opponent thinks he has found victory, only to discover that he has entered into your control.
This first kata sets the feeling for the entire ryū. Gyokko Ryū teaches that true power does not begin with strength. It begins with maai (distance), timing, angle, posture, and awareness. Before striking, before locking, before throwing, before breaking, one must first understand space.
And this is why Gyokko Ryū is essential for Koto Ryū.
Without Gyokko Ryū, Koto Ryū can easily become only hard striking and aggression. But with Gyokko Ryū as its foundation, Koto Ryū becomes something much deeper: precise, hidden, strategic, and alive.
So, when we look at the first kata, Kokū, we are not simply looking at a technique. We are looking at a doorway into the feeling of the entire tradition.
The first gate of Gyokko Ryū is not force.
It is space.
And within that space, the whole ryū begins to reveal itself.