Futomani: Witnessing Japan’s Ancient Deer Bone Divination
Deep within the mist-shrouded peaks of Chichibu-Tama-Kai National Park, far removed from the neon pulse of Tokyo, an ancient rhythm beats. It is the sound of fire cracking bone, a ritualistic echo that dates back to the very dawn of Japanese civilization. This is Futomani—the “Grand Divination”—a form of scapulimancy that once dictated the will of the gods to Emperors and warlords alike. For the cultural traveler, understanding Futomani is akin to unlocking a secret chamber in the heart of Shinto spiritualism.
Introduction
Japan is a land where the modern and the archaic coexist, but few traditions are as visceral and primal as Futomani. While most visitors are familiar with omikuji (paper fortune slips) found at temples, Futomani represents a far older, more solemn method of communicating with the divine. It involves the reading of cracks formed on a deer’s shoulder blade (scapula) after it has been exposed to intense heat.
Historically used to determine harvest outcomes, weather patterns, and state affairs, this practice has largely vanished from modern life. However, it survives in a few sacred pockets, offering a rare glimpse into the animistic roots of Japanese culture where nature, animal, and human spirit intertwine.
Origins of the Sacred Bone
The practice of osteomancy (bone divination) is not unique to Japan; it has roots in ancient China and Mongolia. However, the Japanese evolution of this practice, specifically using the Japanese deer (Cervus nippon), became distinct during the Yayoi period (300 BCE – 300 CE).
The process is meticulous. The shoulder blade of a male deer is cleaned and purified. During the ritual, known as Futo-mani-no-ho, a priest inserts a heated rod made of cherry birch or similar sacred wood into hollows carved into the bone. As the heat penetrates the calcium, the bone snaps with a sharp report, creating fissures. The shape, length, and direction of these cracks are then interpreted—or “read”—as the voice of the Kami (gods).
Legend and Mythology
To understand the gravity of Futomani, one must look to the founding myths of Japan. The practice is canonically enshrined in the Kojiki (Records of Ancient Matters), Japan’s oldest extant chronicle.
The Heavenly Rock Cave
According to Shinto mythology, when the sun goddess Amaterasu Omikami hid herself in the Heavenly Rock Cave, plunging the world into darkness, the myriad gods gathered to lure her out. It is written that the deities Amenokoyane and Futodama performed a grand divination. They took the shoulder blade of a true stag from Mount Kagu and used burning cherry wood to divine the outcome of their plan.
This mythological precedent establishes Futomani not merely as fortune-telling, but as a divine instrument used by the gods themselves to restore light to the universe. When a priest performs this today, they are re-enacting a ritual that saved the world in Shinto lore.
Modern Culture: Where the Fire Still Burns
In contemporary Japan, high-tech weather satellites have replaced deer bones for agricultural planning, and the ritual has faded from the Imperial Court (which now primarily uses tortoise shell divination, or Kiboku, for specific enthronement ceremonies).
However, Futomani remains a designated Intangible Folk Cultural Property. The most famous and accessible public performance of this ritual occurs at the Musashi Mitake Shrine atop Mount Mitake in Tokyo Prefecture. Here, the tradition has been handed down through hereditary priestly lineages for generations. It serves as a powerful reminder of the “Old Shinto”—faith based on awe of nature rather than codified dogmas.
Traveler’s Tips: Experiencing the Ritual
witnessing the Futomani ritual is a highlight for any serious cultural traveler, but it requires timing and respect.
Where and When
The primary opportunity to view this is at Musashi Mitake Shrine (Musashi-Mitake Jinja). The ritual typically takes place annually on January 3rd during the sunrise ceremonies to predict the fortunes of the crops for the coming year.
How to Get There
From Shinjuku Station in Tokyo, take the JR Chuo Line to Ome Station, then transfer to the Ome Line to Mitake Station. From there, a bus and a steep cable car ride will take you up the mountain. A short hike through cedar forests leads to the shrine summit.
Etiquette
- Silence: This is a solemn religious service. Maintain absolute silence as the priest heats the bone.
- Photography: Rules vary year by year. Often, photography is permitted from a distance, but flash is strictly prohibited as it disrupts the sanctity of the ceremony.
- Dress: Mount Mitake is cold in January. Dress in warm layers and wear sturdy shoes for the walk from the cable car station.
Beyond the Ritual
While on Mount Mitake, stay at a Shukubo (temple lodging). Many of the priests who perform the rites run these traditional inns, offering a chance to eat Shojin Ryori (monastic cuisine) and ask questions about the history of the mountain.
Sources & Further Reading
For those wishing to delve deeper into the textual history of these rituals, the following works are essential:
- The Kojiki (Records of Ancient Matters): Translated by Basil Hall Chamberlain or Donald L. Philippi. Look for the sections detailing the “Heavenly Rock Cave.”
- The Nihon Shoki (Chronicles of Japan): Provides parallel accounts of the mythological origins of divination.
- The Engishiki: An ancient text on laws and customs that details the exact procedures for state rituals, including the selection of materials for divination.