Nai-no-kami

Nai-no-kami (also written Nai no Kami or translated as the “Earthquake Kami”) is a Japanese divine figure or ritual designation associated with earthquakes. The name belongs to the older religious vocabulary of Japan, but it does not identify a single character with a universally accepted genealogy, appearance or mythology. In different contexts, Nai-no-kami may mean an earthquake deity in general, a divine force responsible for seismic disturbances, or a figure invoked in rites intended to avert or calm earthquakes.

Name and meaning

The word nai is an old Japanese term connected with an earthquake or the shaking of the ground. In later Japanese, the usual word is jishin, written 地震, but historical texts and religious traditions preserve older expressions involving nai. Kami means a sacred or supernatural presence, although translating it simply as “god” can be misleading. A kami may be a deity, an ancestral power, a natural phenomenon, a spirit associated with a place, or a force recognised through ritual.

For that reason, Nai-no-kami is best understood as a religious designation rather than a fully developed mythological personality. The expression does not automatically imply a human-shaped god with a fixed family tree. Some modern summaries present Nai-no-kami as though the figure were one clearly defined member of the Japanese pantheon, but the surviving evidence does not support such a simple account.

Earthquakes in Japanese religious culture

Japan is one of the world’s most seismically active regions, and earthquakes have long influenced its religious imagination, political history and local ritual life. Before the development of modern geology, an earthquake was understood through a combination of observation, omen, cosmology and sacred causation. The ground could move because powerful kami were disturbed, because ritual or political disorder had accumulated, or because an extraordinary natural event required purification and appeasement.

Shinto traditions do not contain one single explanation of earthquakes. Religious interpretations varied according to period, locality and institution. Court officials, shrine priests, Buddhist temples and popular communities could all explain the same disaster in different ways. A major earthquake might be treated as a warning from the supernatural world, a calamity requiring ritual response, or a manifestation of a local divine power.

This setting is important when considering Nai-no-kami. The figure should not be forced into the role of a Japanese equivalent of a thunder god or a clearly evil destroyer. Earthquakes were frightening and destructive, but the kami associated with them was not necessarily morally wicked. Rituals sought to acknowledge, pacify or protect communities from a force that was powerful and difficult to control.

Early records and ritual traditions

Early Japanese chronicles record earthquakes among significant events affecting the court and the country. Works such as the Nihon Shoki preserve notices of severe ground movements, although a historical record of an earthquake is not by itself a complete myth about Nai-no-kami. The chronicles often describe unusual natural events because they were politically and ritually important, especially when they appeared to signal disorder in the realm.

Later ritual compilations provide clearer evidence that earthquakes could be addressed through formal religious observance. The Engishiki, a tenth-century collection concerned with court rites, administrative procedures and shrine practice, includes material relating to rituals for earthquake powers. Such evidence shows that earthquake-related kami were recognised within the ritual order of the state. It does not, however, give Nai-no-kami a single narrative comparable to the stories of Amaterasu, Susanoo or Ōkuninushi.

The distinction between a deity’s name and a ritual category is especially important here. A phrase meaning “the kami of earthquakes” may describe the force being addressed in a ceremony without implying that worshippers imagined one individual deity everywhere in Japan. Local shrines could also interpret seismic power through their own sacred geography and established traditions.

Identity and classification

Nai-no-kami is generally classified as a nature kami or a kami connected with a natural disaster. Its sphere is the movement of the earth, particularly destructive shaking. However, the figure has no consistently preserved appearance, gender, genealogy or set of personal attributes. Descriptions that portray Nai-no-kami as a giant, a monster, a serpent or a catfish should therefore be treated cautiously unless they are tied to a particular local or historical tradition.

There is also no secure basis for claiming that Nai-no-kami is a child of Izanagi and Izanami, or that the figure occupies a fixed place among the primordial deities of the Kojiki. The best-known creation myths do not provide a universally accepted biography for an earthquake god under this name. Later attempts to organise Japanese supernatural beings into neat pantheons have sometimes turned descriptive titles into apparently distinct personalities.

The same caution applies to the figure’s powers. Nai-no-kami may be described as causing earthquakes, governing them, embodying them or receiving offerings intended to prevent them. These are related ideas, but they are not identical. Religious language often allows a natural force to be treated both as an event and as a sacred presence connected with that event.

Kashima and the protection of the ground

The strongest widely recognised association in Japanese earthquake folklore is not necessarily with Nai-no-kami itself, but with the shrine traditions of Kashima. Kashima Shrine in present-day Ibaraki Prefecture venerates Takemikazuchi-no-kami, a powerful martial and territorial deity. In later interpretations, Takemikazuchi became associated with controlling or restraining earthquakes.

According to Kashima-related tradition, a sacred kaname-ishi, or “keystone,” extends into the earth and helps hold down a great catfish beneath the ground. When the catfish moves, earthquakes occur; when Takemikazuchi restrains it, the land becomes stable. The details and visual forms of this tradition developed over time, especially in medieval and early modern culture. They should not be presented as the original or universal identity of Nai-no-kami.

The Kashima tradition demonstrates how an earthquake could be connected with a powerful protective kami rather than with an earthquake deity as a separate character. In this framework, the religious focus is the divine power that prevents or suppresses the shaking. Elsewhere, the focus could be the earthquake force itself, addressed through rites of appeasement.

Nai-no-kami and the earthquake catfish

The namazu, or giant catfish, became the most famous animal associated with Japanese earthquake folklore. This image was particularly prominent in the Edo period, when illustrated prints known as namazu-e circulated after major earthquakes. The catfish was shown thrashing beneath the earth, while Kashima’s deity attempted to pin it down with the sacred stone.

Nai-no-kami should not automatically be identified with the namazu. The catfish is an animal symbol and a folkloric explanation of earthquakes; Nai-no-kami is a divine or ritual term for earthquake power. Some representations and later retellings may blend these ideas, but they arose from different layers of tradition. The catfish image also acquired social and political meanings. Namazu-e could portray the earthquake as a force that temporarily overturned social hierarchies, mocked officials or redistributed wealth through rebuilding and repair.

In other words, the catfish belongs especially to earthquake folklore and popular visual culture, whereas Nai-no-kami belongs more broadly to the religious vocabulary surrounding seismic phenomena. Confusing the two produces a more vivid story, but not necessarily a more historically accurate one.

Ritual and symbolic significance

Earthquake-related worship reflects several important features of Japanese religious thought. First, it shows the close relationship between the natural environment and the sacred. Mountains, rivers, forests, storms and unusual events could all be understood as expressions of powers that demanded respect. The moving earth was not outside religion; it was one of the most dramatic ways in which the unseen world could be felt.

Second, earthquake rites expressed the need to restore balance. Offerings, prayers and purification did not amount to scientific explanations, but they provided a communal response to danger. A ceremony could acknowledge loss, seek protection for the sovereign or community, and reaffirm the relationship between human society and the powers of the land.

Third, the idea of an earthquake kami could serve political as well as spiritual purposes. In premodern court culture, disasters were sometimes interpreted as signs that government, morality or ritual order required correction. This did not mean that every earthquake was assigned one definite political message. It means that natural disasters were often understood within a larger moral and cosmological framework.

Regional variation and uncertainty

Japan has many local traditions concerning spirits and kami of particular mountains, faults, stones, springs and settlements. A community might connect earthquakes with a nearby shrine, a buried sacred object, a restless spirit or a deity whose authority extended over the land. These traditions do not necessarily use the name Nai-no-kami, and they should not be merged into one national mythology without evidence.

Even the spelling and translation of the name can vary. Nai no Kami is a readable romanisation, while “Earthquake God” or “Earthquake Kami” conveys the basic meaning but may make the term appear more personal and specific than it is. Japanese religious titles often overlap with common nouns, ritual labels and local names. The exact meaning must therefore be determined from the text, shrine tradition or historical setting in which the expression occurs.

Distinguishing Nai-no-kami from related figures

• Takemikazuchi-no-kami: a major kami associated with Kashima, martial power and territorial authority. In later tradition he is linked with restraining earthquakes, but he is not simply another name for Nai-no-kami.
• Namazu: the giant catfish of earthquake folklore, especially prominent in Edo-period prints. Namazu is an animal figure, not a universal name for the earthquake kami.
• Kaname-ishi: the sacred “keystone” associated with the Kashima legend of stabilising the earth. It is a sacred object or geological-religious symbol, not a deity.
• Ryūjin and other dragon or serpent beings: water and dragon powers sometimes appear in Japanese legends involving the land and natural forces, but they should not be identified with Nai-no-kami merely because both may be connected with the environment.
• Local earthquake spirits: regional beings may have similar functions, yet their names, stories and ritual contexts remain distinct.

Later reception

In modern popular culture, Japanese earthquakes are often explained through the memorable image of a catfish beneath the islands, sometimes alongside a stern deity holding a stone. Museums, educational materials, novels, games and fantasy fiction may also use “Nai-no-kami” as the name of a singular earthquake god. Such portrayals can draw on genuine religious vocabulary and folklore, but they frequently combine elements from different periods.

A fictional Nai-no-kami may therefore be a creative character rather than a reconstruction of a traditional deity. The most historically responsible description is that Nai-no-kami represents an old Japanese conception of earthquake power, preserved in ritual and religious language, while its exact identity varies. Its significance lies less in a fixed adventure narrative than in the way Japanese communities have interpreted, feared and ritually addressed the unstable earth.