In the practice of Iaido (居合道), Battodo (抜刀道), and Kenjutsu (剣術), we often focus on the physical alignment of the blade or the precision of a cut. But for the practitioner of Mugai-ryū (無外流), the ultimate challenge lies within the mind. At the core of our lineage is the concept of Muga (無我).
The Origin: A Poem of Enlightenment
The name of our school itself is rooted in a profound spiritual realization. The founder, Tsuji Gettan Sukemochi (辻月丹資茂), reached enlightenment after years of deep Zen meditation at the Kyōun-ji (慶運寺) temple.
The name “Mugai” comes from a verse in a poem he received from his master:
Ippō mugai nashi (一法無外)
Nyoze dō dō dō (如是道同)
This translates to: “There is no law outside the One Truth; It is everywhere the same.” The word Mugai (無外) means “Nothing Outside.” It implies that there is no separation between the self and the universe. From this flows Muga (無我) — the state of Non-Self.
The famous poem that helped found Mugai-ryu
What is Muga (無我)?
In Japanese, Mu (無) means “nothingness” or “void,” and Ga (我) means “self” or “ego.”
In our daily lives, our Ego (我) is always busy. It judges our performance, fears failure, and seeks praise. In Budō (武道), this ego is an obstacle. It creates tension in the shoulders and hesitation in the spirit.Muga is the process of stripping away this “I.” When the ego is absent, there is no “me” trying to cut; there is only the movement happening in perfect synchronicity.
Muga in Battodo (抜刀道): The Pure Cut
In Battodo, when facing a Wara (藁 – straw mat), the ego often whispers: “Don’t miss,” or “Make a perfect angle.” This thought creates a physical “hitch.”
By seeking Muga, we aim for Mushin (無心 – empty mind). In this state, the Tenouchi (手の内 – the grip) and the Maai (間合い – the distance) are not calculated by the brain, but felt by the soul. The sword becomes an extension of your nervous system, and the cut becomes an effortless expression of reality.
Muga in Kenjutsu (剣術): The Absence of the Opponent
While Iaido is often a solitary pursuit, it is in Kenjutsu (the art of the sword in combat) that Muga undergoes its most intense test. When facing an opponent in Kumitachi (組太刀), the ego naturally reacts with fear or aggression.
In a state of Muga, the opponent is no longer viewed as an enemy to be defeated, but as a mirror. You do not “react” to a strike; instead, your body moves in Shizen-tai (自然体 – natural posture) before a conscious thought even arises. This is the expression of Munami (無波 – “no waves”), where the mind remains undisturbed. By losing the “Self” (Ga), you also lose the “Other.” The dualism of winning and losing simply ceases to exist.
My conclusion with the Ken Zen Ichi Nyo (剣禅一如) Concept
My Liomugai journey is a journey toward this “Non-Self.” Each Kata (型) is an opportunity to shed a layer of vanity. We do not polish the steel to see our reflection; we polish it to understand the void behind the reflection.
As the old saying goes: Ken Zen Ichi Nyo (剣禅一如) — The Sword and Zen are one. Through the discipline of the blade, we find the silence within.
If you have ever watched a Mugai-ryū master perform a kata, or if you have attended a tea ceremony (Chanoyu), you have likely sensed an invisible progression. It isn’t a constant speed, but rather a wave that builds, breaks, and stops dead.
This ternary rhythm is Jo-Ha-Kyū (序破急).
Far more than a simple technical instruction, it is an aesthetic and spiritual law that governs almost all traditional Japanese arts. Let’s dive into this essential concept to understand the dynamics of the sword and Japanese culture.
What is Jo-Ha-Kyū?
The term is composed of three kanji that define the phases of a movement or an event:
Jo (序) – The Introduction: Begin slowly, with restraint. This is the moment of concentration, setting the posture, and grounding the breath.
Ha (破) – The Rupture: The movement develops and accelerates. One “breaks” the initial calm. This is where the action takes shape and unfolds.
Kyū (急) – The Culmination: A sudden, lightning-fast acceleration—the peak of the movement that ends sharply and decisively.
Did you know? This concept was theorized by Zeami Motokiyo, the founder of Noh theater, in the 14th century. He believed that everything in the universe—from a bird’s song to an entire play—followed this natural rhythm.
Jo-Ha-Kyū in Mugai-ryū Iaihyōdō
In Iaido, and particularly in the minimalist style of Mugai-ryū, Jo-Ha-Kyū is what distinguishes a mechanical execution from a demonstration of life (Sei).
The Art of Nukitsuke (Drawing the Sword)
Watch a Nukitsuke closely:
Jo: The hand grasps the Tsuka, the thumb releases the Tsuba (Koiguchi no kirikata). It is an internal movement, almost invisible.
Ha: The sword exits the scabbard (Saza-muchi), speed increasing as the blade glides.
Kyū: The tip clears the scabbard and strikes in a flash. The stop is instantaneous, charged with energy (Zanshin).
If you maintain the same speed from start to finish, your movement becomes predictable. Jo-Ha-Kyū allows you to surprise your opponent by shattering their own rhythm.
A Universal Aesthetic: From Noh Theater to the Tea Ceremony
The genius of this concept is that it applies to fields that seem polar opposites to combat.
In Noh Theater
A Noh play begins with slow, solemn gestures. Gradually, the movements become more complex, the music intensifies, finally ending in a fast, percussive dance before the final silence. Without this rhythm, the audience would lose focus; with it, they are transported into a trance.
In the Way of Tea (Sado)
Even when serving a bowl of matcha, the master follows this curve:
Jo: The slow and meticulous cleaning of the utensils.
Ha: The preparation of the tea, with more fluid and dynamic movements.
Kyū: The final gesture of presenting the bowl, precise and without hesitation.
Why is it important for your practice?
Mastering Jo-Ha-Kyū means learning to manage your energy.
In our modern lives, we are often in permanent “Kyū” mode (urgency, speed). Practicing Iaido forces us to rediscover “Jo” (preparation, conscious slowness).
Dojo Tips:
Don’t rush: A start that is too fast often ruins the end of the movement.
Breathe: Use the inhale for Jo, the breath-hold or controlled exhale for Ha, and the explosive exhale for Kyū.
Observe nature: Think of a water droplet gathering on a leaf (Jo), beginning to slide (Ha), and falling abruptly (Kyū).
Jo-Ha-Kyū is the heartbeat of Budo. By seeking this rhythm in your katas, you are no longer just working your muscles, but your presence in the world. The sword then becomes an extension of this universal pulse.
In the face of chaos, most people react like a leaf in the wind—tossed by praise, broken by criticism, or paralyzed by fear. The Japanese martial tradition offers an alternative: Fudōshin (不動心).
Translated literally as “Immovable Mind,” Fudōshin is a state of psychological and spiritual equilibrium. It is not a state of “unfeeling” or being a statue; rather, it is the ability to remain centered and effective regardless of external circumstances.
The Anatomy of the Immovable Mind
The term is composed of three kanji characters:
Fu (不): Not / Non-
Dō (動): Move / Motion
Shin (心): Heart / Mind / Spirit
In Eastern philosophy, the heart and mind are often viewed as a single entity (Xin or Shin). Therefore, Fudōshin is as much about emotional stability as it is about intellectual focus.
The Metaphor of Water and the Mirror
To understand Fudōshin, Zen masters often use the metaphor of a still pond.
If the water is turbulent, it distorts the reflection of the moon.
If the water is still, it reflects the world exactly as it is.
When your mind is “moved” by anger or anxiety, your perception of reality becomes distorted. You react to your projection of the threat rather than the threat itself. Fudōshin allows you to see the “moon” clearly.
Fudōshin in the Heat of Battle
Historically, this concept was vital for the Samurai. In a duel, a split second of hesitation (caused by fear) or a split second of overconfidence (caused by ego) meant death.
The legendary swordsman Miyamoto Musashi alluded to Fudōshin in The Book of Five Rings, describing a “distracted mind” as a fatal flaw. He argued that the warrior’s spirit should be the same in the midst of a duel as it is in everyday life—calm, observant, and undeterred.
“Both in fighting and in everyday life you should be determined though calm. Meet the situation without tenseness yet not recklessly, your spirit settled yet unbiased.” — Miyamoto Musashi
The Four weak points of the Mind
To achieve Fudōshin, one must overcome the Shiso (the four sicknesses/distractions) that cause the mind to move:
Fear (Kyo): Physical or mental dread that freezes action.
Confusion (Waku): A lack of clarity or doubt in one’s path.
Hesitation (Gaku): Over-calculating or waiting too long to commit.
Surprise (驚 – Kyō): Being caught off guard by the unexpected.
When you master Fudōshin, the unexpected no longer surprises you, not because you predicted it, but because your internal foundation is so solid that no external event can shake it.
Fudō Myō-ō: The Visual Archetype
In Japanese Buddhism, the deity Fudō Myō-ō is the personification of this state. He is often depicted surrounded by flames, holding a sword in one hand and a rope in the other. He looks fierce and terrifying, yet he sits on a flat rock (symbolizing stability). The flames represent the burning of worldly desires and distractions, while his immovable stance represents the indestructible nature of the enlightened mind.
In the name Mugai-ryu, the first character is Mu (無). It is a word that echoes through the halls of Zen temples and the history of Japanese swordsmanship, yet it remains one of the most elusive concepts for a practitioner to grasp.
In 1693, when the founder Tsuji Gettan Sukemochi attained enlightenment at the Zen temple of Azabu-Kyukonji, he composed a poem that gave the school its name. The core of that realization was Mu—the “Great Nothingness.”
But for the modern martial artist, Mu is not just a philosophical abstraction; it is a tactical necessity.
What is ‘Mu’?
In Western thought, “nothingness” often implies a vacuum or a lack of value. In Zen and Mugai-ryu, Mu is the opposite. It is a state of boundless potential. It is the “emptiness” of a bowl that allows it to be useful, or the silence between notes that makes music possible.
In the context of the sword, Mu refers to Mushin (無心), or “No-Mind.”
In Zen philosophy and the Japanese martial arts (Budo), Mushin (無心) is often described as the pinnacle of mental training. While the literal translation is “No-Mind,” it does not imply a state of brain-dead emptiness or unconsciousness. Instead, it refers to a mind that is unfiltered, unattached, and fully present.
The Core Definition: Mind Without “Stopping”
In ordinary life, our minds are “sticky.” We see something we like, and our mind stops to dwell on it. We experience fear, and our mind stops to worry about it. Zen masters describe this as Tomaru (stopping).
Mushin is a state where the mind flows like a river. It reflects the surroundings perfectly but does not “grab” onto any single reflection. Fixed Mind: A mind that is occupied by a single thought or emotion, leaving it blind to everything else. Mushin: A mind that is “empty” of specific thoughts, making it capable of perceiving everything simultaneously.
The Mirror Analogy
The most common way to understand Mushin is through the Mirror Analogy:
A mirror does not choose what to reflect. It reflects a mountain as a mountain and a valley as a valley. It does not judge the mountain for being too high or the valley for being too deep. When the object moves away, the mirror does not try to hold onto the image; it remains empty and ready for the next reflection.
In Mugai-ryu, if your mind is in a state of Mushin, you do not “plan” your response to an opponent. Your mind simply reflects their movement, and your body responds without the delay of conscious thought.
The Mechanics: How Mushin Works in Combat
In his famous treatise The Unfettered Mind, the Zen monk Takuan Soho explained Mushin to the great swordsman Yagyu Munenori using the concept of the “place where the mind stops.”
The Calculation Trap: If you think, “He is going to strike my head,” your mind stops on his sword. You are now frozen.
The Technical Trap: If you think, “I must move my lead foot at a 45-degree angle,” your mind stops on your own feet. You are now slow.
When you achieve Mushin, the “calculation” happens at a subconscious level. Because you aren’t “thinking” about the technique, there is no “gap” between the opponent’s movement and your reaction. This is often described as Spark and Stone: as soon as the flint is struck, the spark flies. There is no interval.
The Path to Mushin: Discipline and Repetition
You cannot simply “decide” to have No-Mind. If you think, “I will now empty my mind,” you have just filled your mind with the thought of emptying it.
Mushin is the result of limitless repetition.
Conscious Effort: You learn the kata of Mugai-ryu with intense focus on every detail.
Internalization: The movements move from the prefrontal cortex (thinking brain) to the cerebellum and basal ganglia (muscle memory).
Transcendence: Once the body knows exactly what to do, the conscious mind is “fired” from its job. It can finally sit back and watch, entering the state of Mushin.
Mushin in your Daily Life
While Mushin is a weapon in a duel, it is a sanctuary in daily life. It allows a person to:
Respond to Stress: Instead of panicking (the mind stopping on a problem), you see the situation clearly and act.
Total Presence: Whether drinking tea or writing a blog post, you are 100% there.
Freedom from Ego: Since Mushin is “No-Self,” the anxieties of the ego (pride, shame, embarrassment) lose their power over you.
Mushin written on Kakejiku in Zen Dojo (Shizuoka)
Mushin in a duel
Imagine standing before an opponent. If your mind is filled with thoughts, you have already lost. The mind “stops” (tobu) on various distractions:
The Ego: “I must look skilled.”
The Fear: “What if I am hit?”
The Technique: “I must remember to rotate my hips.”
The Opponent: “He looks faster than me.”
Each of these thoughts acts as an anchor. In a duel where life and death are decided in a fraction of a second, any “stopping” of the mind results in a delayed reaction.
Mushin is the state where the mind is like water—reflecting everything but grasping nothing. It is a state of flow where the body moves spontaneously, responding to the opponent’s intent before they even realize they’ve moved.
Mushin during Iaido Training
In Iaido, we often practice “cutting” as an act of purification. Every strike is not just an attack on an imaginary foe, but a strike against our own internal distractions. By focusing intensely on the “Now” of the cut, the “Yesterday” and “Tomorrow” vanish.
Even after the sword is returned to the scabbard (Noto), the state of Mu must remain. This is Zanshin. If you finish a kata and immediately relax or start thinking about lunch, you have lost the “emptiness.” True Mu is a continuous state of readiness that exists whether the sword is drawn or sheathed.
Mushin : Be like a mirror my friend
A swordsman with an empty mind is unpredictable. If you have no “intent” (Satsujin-ken), your opponent has nothing to read. You become like a mirror; if the opponent moves, you move. If they stay still, you are a mountain.
In the words of the Zen masters:
“When the mind is empty, it is free from the ‘self.’ When it is free from the ‘self,’ it becomes a vessel for the universe.”
