The Esoteric Winter Solstice Ritual: Kukai's Practice of Welcoming the Return of the Sun and Its Modern Applications

A Special Day: The Winter Solstice

The day with the longest night and the shortest daylight of the year — the winter solstice. For those of us living in the northern hemisphere, the solstice is a kind of *bottom.* The nights will grow no longer; from here, little by little, the light returns.

Since ancient times, people around the world have celebrated this day as a special turning point. The ancient Egyptian festival of Osiris, the Roman Saturnalia, the solstice light at Stonehenge — all are evidence that people have sensitively felt the cosmic rhythm of *darkness reaching its peak and light being reborn,* and responded with prayer and celebration.

In Japan, there is the phrase *ichiyō raifuku* — "one yang returns." Darkness (yin) reaches its extreme, and warmth and light (yang) come back. Based on the philosophy of the *I Ching,* this phrase holds a deep insight: the winter solstice is not merely a day on the calendar, but a sacred moment when the cosmos *turns.*

In Shingon esoteric Buddhism, the winter solstice carries significant meaning. Among the ritual practices (*shuhō*) transmitted by Kukai (Kobo Daishi) is the *fire practice* known as *goma* — the sacred fire offering. The flames of goma are deeply connected to the winter solstice as a *turning point of the return of light,* and can be understood as a ritual that welcomes, through human prayer, the cosmic force moving from darkness toward light.

The Symbolism of "Fire" and "Light" in Esoteric Buddhism

In Shingon esoteric Buddhism, *fire* and *light* are not merely physical phenomena.

The name of *Dainichi Nyorai* — the central Buddha of esoteric Buddhism — means *Great Sun.* In esoteric teaching, the light of the sun is the symbol of Dainichi's wisdom and compassion. Just as the fundamental light of the cosmos brings life and warmth to this world, the light of Dainichi's wisdom illuminates the essential nature of all beings.

The winter solstice is the turning point where this *light* is most deeply hidden in shadow — yet precisely at that moment, it begins its return. Viewed esoterically, the winter solstice can be understood as the sacred day when Dainichi's light *recharges* within the darkness, preparing to radiate outward to the world once more.

The goma flame is the symbolic fire that mediates this cosmic power of light on a human scale. By casting offerings into the fire while chanting mantras, the practitioner resonates their intention with the power of Dainichi (*kaji*). That goma rituals are frequently performed near the winter solstice can also be understood as aligning prayer with this cosmic force of transformation.

Five Practices for a Modern Winter Solstice Ritual

Even without special ritual implements or a formal hall, you can practice your own version of the winter solstice ritual at this turning point in the year. Below are five practices rooted in the spirit of Kukai's teaching.

Practice 1: Rise Before the Winter Solstice Sunrise and Face East to Welcome It

The winter solstice sunrise is a special sunrise within the year. After the longest night of the year, welcoming the returning light with joined palms is the esoteric practice of *gratitude for light.*

Upon waking, face east, bring your palms together, and quietly lower your head. Simply saying in your heart, *Today too, the light has returned. This light is what keeps me alive,* makes it a winter solstice prayer.

At Japanese temples, priests perform fire rituals in the early morning of the winter solstice, praying for the return of light. What we can do at home is receive a portion of that spirit into the gestures of our daily life.

Practice 2: Light a Candle and Look Back on the Year

On the dark winter solstice night, light a single candle. Bring the electric lights down and spend time in just that small flame.

While quietly gazing at the flame, look back on the year: what went well, what was hard, the people and events for which you are grateful. Doing this reflection not in the year-end busyness but in the quiet of the winter solstice is the esoteric practice of *inner contemplation (naisei).*

The flame is always swaying. Its form keeps changing, yet it burns without going out. Overlay *your self of this year* on that flame. Swaying, and yet, you are here. Perhaps that was enough for this year.

Practice 3: The Yuzu Bath and Mantra Practice

In Japan, the *yuzu bath* at the winter solstice is a beloved tradition. But seen through an esoteric lens, it carries meaning beyond mere custom.

The fragrance of yuzu is said to hold the power of dispelling harmful energy and purifying the body and its surrounding space. The yuzu bath overlaps with the esoteric *incense practice (kō)* — using fragrance to purify space and mind.

While soaking in the bath, try quietly chanting the following mantra:

*On — a — bi — ra — un — ken* (the mantra of Dainichi Nyorai)

This is the foundational mantra representing Dainichi. *A* signifies all beginnings; *bira* signifies radiance; *unken* signifies *归命 (kimyō)* — entrusting everything to Dainichi's light. If this feels difficult, saying in your own words, *Thank you for today — the light has returned,* carries the same direction of heart.

Practice 4: The Winter Solstice Meal — Kabocha and Adzuki to Align Energy

The tradition of eating *kabocha* (pumpkin) and *adzuki* (red beans) at the winter solstice has been passed down through the generations. From an esoteric perspective, this meal too can be considered part of the ritual.

Kabocha is a *yang thing* — it has stored the sun's energy from summer. The red of adzuki is the *color of fire,* said to repel malevolent energy and invite good fortune. The dish *itoko-ni,* which combines these two, is a meal practice for the winter solstice that makes deep sense.

Before eating, bring your palms together once. Say in your heart, *I receive the power of nature held in this food. Crossing through the dark season, into the light.* Then eat slowly and with attention. When a meal is performed as *ritual practice,* eating the same food becomes an entirely different experience.

Practice 5: Writing the Characters for "Ichiyō Raifuku"

On this winter solstice night of releasing what is unnecessary, write the four characters 一陽来復 on a piece of paper. Use a brush pen if you have one — a ballpoint pen is fine too.

Write each stroke carefully, with care. There is no need to hurry, no need to write beautifully. The act of writing itself stills the mind and becomes the preparation to close the year and welcome the returning light.

Kukai was a master of calligraphy, and regarded writing not as the mere recording of characters but as an act of connecting mind and cosmos. Writing *ichiyō raifuku* on the winter solstice night is also a pledge to yourself: *I believe the light will return.*

The winter solstice often falls in a busy work period — but one year, I made the conscious effort to rise early, and in the dim morning hours, wrote 一陽来復 on a piece of paper and placed it by the window. Throughout that day, every time my eye happened to fall on it, I felt something like: *Today too, the light is growing, little by little.* I realized that small, intentional gestures can create breathing room in the heart, even in a busy season.

From Winter Solstice to New Year's — The Esoteric Way of Welcoming the Year

The winter solstice falls around December 22. From there to New Year's Day is about ten days. In the esoteric approach to welcoming the year, these ten days can be understood as a *period of preparation for receiving the light.*

• Winter Solstice (around 12/22): Inner contemplation and gratitude. Look back on the year and release what is no longer needed.
• New Year's Eve (12/31): Purification. Through the year-end cleaning and the tolling of the temple bells, cleanse the energy of the passing year.
• New Year's Day (1/1): Vow. In the new light, make your intention for the year.

Simply holding this three-stage awareness shifts the experience from *somehow ending the year in busyness* to beginning the new year with a genuine sense of closure from within.

In esoteric Buddhism, there is a year-end ritual (*saibo no shuhō*) for dispelling misfortune and praying for the peace of the coming year. Rendered into modern life, the flow of *contemplation → purification → vow* from winter solstice to New Year's Day corresponds to that practice.

"Because There Is Darkness, There Is Light" — The Deep Teaching of the Winter Solstice

The deepest wisdom the winter solstice offers is the truth: *Because there is darkness, there is light.*

If daylight continued forever, we would never feel the preciousness of light. Because there is night, we rejoice at morning. Because there is winter, we long for spring. Because there is suffering, joy runs deep.

Kukai's teaching of *bonnō soku bodai* — that our very afflictions and confusion are the seeds of awakening — follows the same logic as the winter solstice. Rather than denying and trying to eliminate the dark, we see that within darkness lies the power from which light is born. Rather than fearing winter's cold, knowing that spring lies beyond it, we live through the cold.

Once a year, the winter solstice teaches us this deep truth as the *rhythm of the cosmos.* This year's winter solstice, try looking up at the sky around sunset. At the beginning of the longest night, the deepest seed of light is present — the wisdom of *ichiyō raifuku* that Kukai transmitted breathes quietly beyond the night sky.