Written by Kathy Wheatley on
 May 10, 2025

The enigma of a 1,000-year-old 'mummified dragon' discovered by a samurai finally unraveled

In a captivating revelation, the enigmatic mummy preserved for centuries in Japan's storied Shosoin Treasure House has been identified conclusively as a Japanese marten.

According to the US Sun, the scientific investigation employed modern technologies, revealing that the creature, once thought mythical, dates back to between the 11th and 12th centuries.

The Samurai's Discovery at Todaiji Temple

The story of the so-called "rainbow dragon" begins in 1429, when the samurai Yoshinori Ashikaga uncovered the mummified creature at the historic Todaiji Temple in Nara, Japan. Ashikaga, an esteemed warrior of his time, happened upon this mysterious artifact after he made a cut from the Ranjatai, an aromatic wood, and observed the creature, which had dried in the sun and resembled a small dragon.

Since then, the peculiar discovery has found a home in the Shosoin Treasure House, adding to the allure and mystique of its collection. Given its dragon-like appearance, the mummified creature has intrigued scholars and history enthusiasts for centuries, prompting many to speculate about its origins and true nature.

Technological Insights Unravel the Mystery

The breakthrough in the understanding of this creature came through the use of advanced technologies, including X-ray examination and radiocarbon dating. The X-ray analysis allowed researchers to compare its skeletal structure with known species, which identified the mummy as a Japanese marten, a weasel-like mammal native to the region.

Further analysis revealed the marten to be a fully grown female, approximately 40cm in length. Radiocarbon dating then placed the marten's remains between the mid-11th to mid-12th century, aligning with historical records from the Muromachi Period that mentioned a dragon-like object found at the same locale.

Speculations and Discoveries in Shosoin Treasure House

The investigation also pondered the circumstances under which the marten came to be mummified and enclosed within the Shosoin Treasure House. One theory suggests that the marten might have wandered into the treasure house during a period of repairs and subsequently became trapped. There, the creature died and was naturally mummified, preserving it for centuries.

Researchers considered another possibility: that someone deliberately placed the mummified marten inside the treasure house. They bolstered this theory by noting that someone never found the mummy's forelegs, suggesting possible human intervention in its preservation.

Mami Tsuru, a prominent conservationist involved in the research at Shosoin, expressed the significance of the findings for understanding the breadth of the collection housed here. "The age determination has significantly increased the possibility that the mummy is the sun-dried dragon-looking object recorded in the document from the Muromachi Period," Tsuru elaborated.

Shosoin's Eclectic and Historical Artefacts

The 8th-century Shosoin Treasure House, known for its impressive array of artifacts from various cultures including Japan, China, India, and the Islamic world, has made a significant discovery. This discovery not only deepens our understanding of the artifacts housed there but also highlights the House's role in preserving a diverse range of items. Tsuru noted, "We believe this is a good example of how Shosoin has protected not only beautiful items but also all the items inside the repository."

In a broader context, this revelation sheds light on other items in the Shosoin collection, which people once believed were parts of mythical creatures, such as dragons. These items have since been identified as originating from more mundane sources like Kobe moles, crows, and pigeons. The reclassification of these items continues to reveal the rich and intricate history interwoven into the Shosoin collection.

Modern Science Enhancing Historical Narratives

This integration of modern scientific techniques with historical inquiry exemplifies how contemporary tools can enhance the understanding of ancient artifacts. As science continues to advance, it permits a more nuanced appreciation of historical narratives that were once clouded by mythology and speculation, bringing us closer to the tangible truths of our forebearers’ lives and their environments.

Shosoin's findings not only resolve a longstanding mystery but also reinforce the importance of interdisciplinary approaches in historical and cultural scholarship. They ensure that every item, no matter how small or initially misunderstood, receives its rightful place in the annals of history.

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About Kathy Wheatley

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