The Mystery of Urashima Taro and Shrines: The Shinto View of Life and Death Behind the Fairy Tale

The Dragon Palace Was the "Eternal Land" — Where Shinto Cosmology Meets the Urashima Legend

The Dragon Palace that Urashima Taro visited is understood as an undersea version of Tokoyo no Kuni — the Eternal Land of Shinto cosmology. Tokoyo no Kuni is the paradise of immortality said to lie beyond the sea. The Nihon Shoki records that the deity Sukunahikona departed for this land, and that Tajimamori crossed the seas on Emperor Suinin's orders seeking the "Tokijiku no Kakunokonomi" — the fruit of eternal life. Tajimamori spent ten years journeying to Tokoyo and back with the sacred fruit, only to find upon his return that Emperor Suinin had already passed away. Overcome with grief, he took his own life at the emperor's tomb. This tragedy, too, hints at the temporal dissonance between the otherworld and the mortal realm.

Time flows differently in the Dragon Palace because Tokoyo is a world where time does not exist. The three years Urashima spent there equaled three hundred years in the mortal world. This was no mere fantasy but evidence that the Japanese have long believed in other worlds beyond this one where the laws of time operate differently.

In the cosmology depicted in the Kojiki and Nihon Shoki, the world is structured in three layers: Takamagahara (the celestial realm), Ashihara no Nakatsukuni (the terrestrial realm), and Yomi no Kuni (the underworld of the dead). But beyond these, there was believed to exist a fourth otherworld — Tokoyo no Kuni — lying across the sea. This Tokoyo faith shares deep connections with the Okinawan belief in Niraikanai, a paradise beyond the sea where ancestral spirits dwell and from which deities visit annually to bring abundance and fertility. The Urashima legend is a mythological text of profound importance, giving narrative form to this oceanic Tokoyo faith shared among Japan's maritime peoples.

The Oldest Urashima Legend in the Tango no Kuni Fudoki

The earliest written record of the Urashima Taro story appears in fragments of the Tango no Kuni Fudoki, compiled in the 8th century. Here the protagonist is called "Urashimako" and is described as a man from Tsutsukawa in Hioki Village, Yosa District. The Man'yoshu also contains a long poem about the Urashima legend composed by Takahashi no Mushimaro, confirming that the story was already widely known during the Nara period. The Nihon Shoki also records under the twenty-second year of Emperor Yuryaku's reign (478 CE) that "a man of Tsutsukawa in Yosa District, Tamba Province, named Mizunoe no Urashimako, went fishing in a boat and caught a great turtle." The fact that he is recorded as a historical figure in an official chronicle is particularly noteworthy.

In the Fudoki version, Urashimako does not rescue a turtle. Instead, while fishing, he catches a five-colored turtle that transforms into a beautiful woman. The two travel together to Horai (Tokoyo), spend three years there, and upon his return, he discovers that three hundred years have passed. Notably, unlike the later fairy tale versions from the Muromachi period onward, the original text describes Urashimako entering into a marriage with the maiden of the Dragon Palace. This belongs to the mythological archetype known as "irui konin tan" — tales of marriage between humans and supernatural beings — a pattern found in mythologies around the world.

In Japanese mythology, the marriage of Yamasachihiko and Toyotama-hime fits precisely this pattern. The story of Yamasachihiko, who wed Toyotama-hime in the palace of the sea god, is considered one of the prototypes for the Urashima legend, sharing the common motif of exchange between a marine otherworld and the human realm. What is also fascinating is that the Tango no Kuni Fudoki describes Horai with imagery of "palaces of gold and silver" and "gates adorned with jewels" — descriptions reminiscent of a heavenly paradise. This suggests that long before the infusion of Buddhist cosmology, the Japanese had already envisioned a splendid otherworld beyond the sea.

The Jeweled Box and the "Taboo of Looking" — An Inviolable Rule Running Through Japanese Mythology

Urashima was told never to open the box, yet he opened it anyway. This "taboo of looking" or "taboo of opening" is a fundamental motif that appears repeatedly throughout Japanese mythology.

The most famous example is the scene where Izanagi sees the decayed body of Izanami in the underworld. Izanami begged him not to look, but Izanagi could not restrain himself and lit a fire. The result was the permanent severance of their relationship, with Izanami becoming the ruler of the land of the dead. Similarly, when Toyotama-hime reverts to her true form — a shark — during childbirth and is seen by her husband Yamasachihiko, she flees back to the sea kingdom in shame. The same "taboo of looking" recurs in Japanese folktales such as Tsuru no Ongaeshi (The Grateful Crane) and Tennin Nyobo (The Celestial Wife), where the moment the prohibition is violated, happiness is irrevocably lost.

What these stories share is the principle that bringing something from the otherworld into this one, or breaking the boundary between realms, always brings irreversible consequences. The jeweled box was a vessel containing Tokoyo's frozen time, and opening it in the mortal world meant colliding two worlds' laws. Urashima's aging was not punishment but the natural consequence of cosmic law — the time that had been suspended in Tokoyo catching up in an instant.

The folklorist Kunio Yanagita interpreted this "taboo of looking" as an expression of the social and religious taboos that maintain the boundary between the otherworld and the mortal realm. In Shinto, the distinction between sacred space and profane space is of paramount importance, and torii gates and shimenawa ropes serve precisely as markers of this boundary. At the Inner Shrine of Ise Jingu, no ordinary person is permitted to approach the innermost sanctum, and the main hall of Izumo Taisha is closed to all but Shinto priests. These principles of "that which must not be seen" and "that which must not be entered" are essentially the same as the boundary symbolized by the jeweled box in the Urashima legend — boundaries that must never be crossed.

Urashima Shrines Across Japan and the Faith of the Sea

Shrines dedicated to the Urashima legend exist throughout Japan, and their distribution vividly illustrates the spread of maritime culture and Tokoyo faith in ancient Japan.

Urashima Shrine in Ine, Kyoto Prefecture is the most famous, enshrining Urashimako as its deity. Its founding is traditionally dated to the second year of Tencho (825 CE) under Emperor Junna. The shrine houses the Urashima Myojin Engi Emaki — an illustrated scroll believed to date from the Muromachi period — which has been designated an Important Cultural Property. The scroll vividly depicts scenes of the Dragon Palace and the moment the jeweled box is opened, revealing how sacred this legend was considered by people of that era. The shrine precincts also preserve a treasure said to be the "jeweled box" itself, and for the fishermen of the Tango region, Urashimako served as a guardian deity of maritime safety and bountiful catches.

Mount Shiudeyama in Mitoyo, Kagawa Prefecture has a tradition as the place where Urashima opened the jeweled box. The mountain's name is said to derive from the purple clouds that rose from the box, and from its summit one can survey the islands of the Seto Inland Sea. Throughout this region, numerous place names connected to Urashima Taro survive, and on Maruyama Island off the Shonai Peninsula, the sea princess Otohime is enshrined. Near the base of the peninsula, in the town of Nio, there is even a place called "Furo no Hama" (the Beach of Eternal Youth), preserving a vivid link to the Tokoyo belief in immortality.

At Renpo-ji Temple in Yokohama, Kanagawa Prefecture, there is a site said to be Urashima Taro's grave, and the surrounding area features a concentration of Urashima-related place names including Kamezumi-cho, Urashima-cho, and Urashima-oka. Furthermore, the Nezame no Toko gorge in Kiso, Nagano Prefecture also preserves an Urashima Taro legend — it is said that Urashima awoke at this striking gorge of granite rock formations. The fact that the legend spread even to inland areas demonstrates that this story had permeated not just the consciousness of coastal peoples but the spiritual world of the Japanese nation as a whole.

The Sacred Turtle — Divine Messenger and Symbol of the Sea Faith

The turtle that Urashima Taro rescued was no ordinary animal but a sacred being in the Shinto tradition. Since ancient times, turtles have been symbols of longevity and immortality, a belief encapsulated in the Japanese saying "cranes live a thousand years, turtles ten thousand." Archaeological excavations of Kofun-period sites have also uncovered haniwa clay figures shaped like turtles, demonstrating that reverence for turtles was deeply rooted in ancient Japan.

The practice of kiboku — divination using turtle shells — transmitted from China had a major influence on ancient Japanese ritual. In kiboku, turtle shells are heated and the patterns of cracks are read to determine fortune. This practice was passed down through generations by the Urabe clan of Tsushima and played an important role in court rituals. Most notably, in the Daijosai — the great thanksgiving ceremony performed at the accession of a new emperor — kiboku was used to determine the location of the sacred rice paddies. This tradition was maintained even in the Reiwa-era Daijosai, demonstrating that kiboku remains a living ritual practice to this day. The turtle thus possessed a dimension as a divine messenger — a "shinshi" — a mediator conveying the will of the gods.

It is no coincidence that in the Urashima legend, the turtle serves as guide to the Dragon Palace. The turtle was a mediator linking the marine otherworld with the human world above — a pilot to the Eternal Land. In the Tango no Kuni Fudoki, the turtle itself transforms into Otohime, suggesting that the turtle was not merely a messenger but an otherworldly being in its own right. The description of the five-colored turtle is also significant: the five colors correspond to the Chinese Five Elements theory (wood, fire, earth, metal, water), indicating a supernatural being that embodies the fundamental principles of the cosmos.

Turtle-shaped stone statues and water basins can also be found at shrines throughout Japan. The turtle statue at Matsuo Taisha in Kyoto is particularly famous — pouring water over it is said to grant wishes. Turtle statues also line the approach to Izumo Taisha, reflecting the turtle's role as guardian of sacred precincts.

The Urashima Legend and Modern Science — A Remarkable Parallel with Relativity

Intriguingly, the "time discrepancy" in the Urashima legend bears a structural resemblance to "time dilation" as described in Einstein's special theory of relativity, published in 1905. Japanese physicists sometimes use the term "Urashima Effect" when explaining this phenomenon. For an object traveling near the speed of light, time passes more slowly as observed from a stationary frame of reference. The premise that three years in the Dragon Palace correspond to three hundred years in the mortal world aligns precisely with this principle.

Of course, the ancient Japanese did not know about relativity. However, the intuition that "time flows differently depending on place or state" may be universal to humanity. Everyone has experienced the subjective sense of time in which minutes in a dream feel like hours, or pleasant hours pass in a flash. Ancient peoples may have sublimated this sensation into mythology, constructing the grand cosmological vision that "the laws of time differ in the otherworld."

Remarkably, myths describing such temporal displacement exist around the world. In Irish Celtic mythology, the hero Oisin spends three years in Tir na nOg — the Land of Eternal Youth — only to discover upon his return that three hundred years have passed, a plot virtually identical to the Urashima legend. Indian epics likewise feature the concept of time flowing differently between the celestial and terrestrial realms. The fact that different cultures independently arrived at the same idea provides compelling evidence that the intuition of time's relativity is universal to humankind.

Even in modern astrophysics, it has been theoretically proven that gravitational time dilation becomes significant near black holes. The Dragon Palace, existing deep beneath the sea, can be seen as a remarkably prescient product of imagination — an otherworld where immense forces warp the fabric of time itself.

What the Urashima Legend Tells Us Today — Nostalgia for "The Place We Cannot Return To"

At its deepest level, the story of Urashima Taro depicts nostalgia for "the place we cannot return to." Urashima wished to go home and did indeed return, but there was no longer anyone he knew. Three hundred years had changed everything — the landscape, the people, the institutions. Despite having "returned," he had in truth been unable to return at all.

This feeling resonates deeply with us in the modern world. When someone who has left their hometown for the city returns after a long absence, they find the streets transformed, their acquaintances gone, and their place in the community vanished. Or when we look back fondly on our youth, we know we can never return to those days. The story of Urashima Taro is universal literature that expresses the irreversibility of time and the sorrow for what has been lost in a form anyone can understand.

In Shinto, time is understood not as linear but as cyclical. The rotation of the four seasons, the repetition of annual rituals, the periodic rebuilding of shrine halls through shikinen sengu — all of these are attempts to maintain an "eternal present." The shikinen sengu of Ise Jingu, in which the shrine buildings are reconstructed every twenty years, achieves the paradox of being perpetually new while remaining eternally unchanged. The Urashima legend, by depicting the tragedy of a person who has fallen out of this cycle, may paradoxically be conveying the preciousness of "being here, in this place, right now." There is no returning to the moment before the jeweled box was opened. And yet it is precisely for this reason that the teaching to cherish each present moment continues to resonate in our hearts across more than a thousand years.