Picture a man walking into the mountains. He fasts. He meditates. He gives himself to the elements — the cold, the wind, the rain. For days. For weeks. Until something breaks open. Until something that was sealed before begins to flow. Until a force moves through him that he did not make, but that changes him from the ground up.
That is the story of Mikao Usui on Mount Kurama. It is also the story of thousands of Yamabushi before him. Because what Usui did there was not a personal invention. It was a pattern — an ancient pattern, practiced in the mountains of Japan for at least a millennium and a half. The pattern has a name: Shugendō.

What is Shugendō? 修験道
Shugendō is Japan's oldest syncretic spiritual tradition — a current that still runs in the mountains today. Several streams flow into it: shamanic practices that existed in Japan long before Buddhism arrived; Daoist techniques that travelled in from China; Shintō reverence for the kami in mountains, waterfalls and forests; the esoteric Buddhism of the Tendai and Shingon schools; and a mountain veneration as old as Japanese culture itself.
The practitioners of Shugendō are called Yamabushi 山伏 — literally, "those who lie down in the mountains." They go into the mountains to practice what cannot be practiced in the lowlands: full confrontation with nature, with themselves, and with the forces that move beyond the human will.
The Yamabushi — mountain ascetics between worlds 山伏
The Yamabushi are not monks in the classical sense. They do not live behind monastery walls. Their temple is the mountain. Their practice is the confrontation with the elements. They stand under ice-cold waterfalls until the body stops shaking and something else begins. They walk along narrow ridges where one wrong step means death. They fast in caves, surrounded by darkness and silence, until the line between inside and outside dissolves.
That sounds extreme. It is extreme. But it has its own logic. Yamabushi practice rests on a recognition: the ordinary mind — the mind that plans, controls, analyses — can become an obstacle. Certain spiritual experiences only become possible when that controlling mind lets go. When the body meets its edge. When the human being stops trying to master the situation and gives in to something larger.
In Shugendō the mountain is not a backdrop — it is the practice. Nature itself becomes the initiator. The waterfall, the cold, the height, the darkness — these are not obstacles to be overcome. They are gates that open when the practitioner is ready.
The Yamabushi traditionally wore a recognisable outfit: the white robe, the small black cap (tokin), the conch-shell horn (horagai) whose sound carries through the mountains. And they practiced something that matters especially here: Kuji Kiri.
Kuji Kiri — the heart of Yamabushi practice 九字切り
Nine syllables. Nine hand gestures. Nine cuts through the air. Kuji Kiri 九字切り is one of the most well-known practices of Shugendō — and one of the most misunderstood. In the West it is mostly recognised through anime, where the finger seals appear as a ninja technique. The truth is older and richer: Kuji Kiri is a ritual practice that grew at the meeting point of Shugendō, esoteric Buddhism, Shintō and shamanic Daoism.
The Yamabushi practiced Kuji Kiri before entering the mountains — as protection, as activation of spiritual forces, as connection with the kami and the Buddhist protective deities. The nine syllables — Rin, Pyō, Tō, Sha, Kai, Jin, Retsu, Zai, Zen — are not mere words. They carry force. Each syllable links the practitioner to a particular spiritual quality, a particular protective being, a particular dimension of reality.
The link to Reiki is right in front of us — and at the same time almost invisible in the Western retelling. Usui came from a world in which Kuji Kiri was a given. The finger seals, the mantras, the ritual focusing of energy — all of it belonged to his spiritual landscape. That he developed, on Mount Kurama, a practice that channels energy through hand gestures and symbols is no coincidence. It is the natural consequence of his roots in Shugendō and Tendai.
The pattern: withdrawal — ascesis — breakthrough 行
What Usui did on Mount Kurama — fasting, meditating, exposing himself to the elements until a transforming experience arrives — is not a one-off event. It is a pattern Shugendō has practiced for centuries. The Yamabushi call it Nyūbu 入峰 — "entering the peaks." A practice with a clear rhythm:
First, the withdrawal from everyday life. Then the steady intensification of the practice — less food, less sleep, more meditation, more confrontation with the elements. Then the crisis — the point where body and mind meet their edge. And finally, when everything else has fallen away: the breakthrough. The experience that changes everything. The meeting with a force that lies beyond personal will.
This does not make Usui's experience smaller. Quite the opposite. It places it inside a context — inside a tradition that knew how such experiences become possible. Usui did not walk blindly into the mountains. He followed a path he already knew. He knew the practice. He knew the tradition. And he had the courage to walk it all the way through.

Shugendō and the origins of Reiki 源
Shugendō is the key to a question that is rarely asked properly in the Western Reiki world: where does Reiki actually come from? The standard answer — "Usui received it on Mount Kurama" — is true, but incomplete. It does not say why he went to Mount Kurama. It does not say which tradition he was following. And it does not say which currents fed his Reiki practice.
The fuller answer: Reiki grew at the crossroads of several traditions. Shugendō — with its mountain ascesis, its protection rituals, its Kuji Kiri. Tendai — with its Taimitsu, its Lotus Sutra, its nyuga-ga-nyu meditation. Shingon — with its Siddhaṃ, its mandalas, its mantras. Shintō — with its kami, its kotodama, its purification rites. And shamanic Daoism — with its energy techniques, its talismans, its methods of transmitting force.
Usui did not "invent" any of these traditions. He brought them together. From the streams he knew and practiced, he shaped something new — a practice that carries the essence of all of these currents, but in a more accessible form. That is his achievement. Not the invention of something new, but the synthesis of something ancient into something living.
Reiki is not an isolated method that appeared out of nowhere in 1922. It is the youngest branch of an ancient tree — a tree whose roots reach into shamanic Daoism, into esoteric Buddhism, into Shugendō and into Shintō. Knowing the roots is what lets you understand the flower.
En no Gyōja — the founder of Shugendō 役行者
The Shugendō tradition reaches back to the seventh century. Its legendary founder is En no Gyōja 役行者 — "En the practitioner." A half-mythic mountain ascetic who, according to tradition, developed extraordinary capacities: levitation, action at a distance, the ability to call on nature spirits. The historical figure behind the legend was most likely a mountain ascetic named En no Ozunu, who practiced in the mountains of the Kii peninsula in the seventh century.
En no Gyōja is honoured in the Shugendō tradition as a living model — as the human being who showed that spiritual force is not found in books, but in direct practice. In direct confrontation with nature. In passing through extremes. His story carries the same message as Usui's: the force is not understood in theory. It is lived.
The parallel is not superficial. En no Gyōja and Mikao Usui stand in the same line — not as direct teacher and successor, but as people who walked the same way: the way into the mountains, the way through ascesis, the way to breakthrough. And both brought something back that touches and transforms other human beings.
The mountains as spiritual landscape 山
In the West, mountains are scenery. In Japan, mountains are practice. Every great mountain in Japan is a spiritual place — inhabited by kami, visited by ascetics, walked by pilgrims. The mountains are not a backdrop for spirituality. They are spirituality. Japanese mountain veneration is older than Buddhism, older than Shintō as an organised religion. It reaches back into the shamanic roots of Japanese culture.
Mount Kurama stands inside this tradition. It is not tall — only 584 metres. But it is old. The veneration of Mount Kurama reaches back more than a thousand years. Tendai temples stood on its summit. Yamabushi walked its trails. Ascetics meditated in its forests. Usui did not choose any random mountain. He chose a place that had been known as a site of spiritual force for centuries.

What this means for your practice 道
Shugendō shows something that matters for every Reiki practice: the deepest experiences do not come from the head. They come from the body, from confrontation, from the willingness to give yourself to something larger than your own will.
That does not mean you have to walk into the mountains and fast. But it does mean the inner stance matters. The Yamabushi stance is not performance — it is surrender. Not "I will make this happen" — but "I let myself meet what arrives." And that is exactly the stance that lets Reiki flow. Not effort. Not technique. Openness to what wants to come.
The next time you lay on hands and feel the force moving through you — know this: you are standing in a line that runs back through Usui to the Yamabushi, to En no Gyōja, to the ancient mountain ascetics who practiced in the forests of Japan long before the word "Reiki" existed. The force you feel has a history. And that history leads into the mountains.
In Shingon Reiki this connection is held consciously. Shugendō is not a historical footnote — it is a living source that feeds the practice. Those who want to go deeper find a space for that in the initiations and live events — and in Kuji Kiri practice, a direct doorway into the methods of the Yamabushi.
Your path into Shingon Reiki
Kuji Kiri, mountain practice, living tradition — Shingon Reiki carries you back to the sources. Find the entry point that fits where you are now.
Your Path Discover Kuji Kiri