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Ishi-no-Hoden – Japan’s Colossal 500-ton Megalithic Enigma

Many researchers believe that this megalith, located in Japan, is out of place. The megalithic rock called Ishi-no-Hoden weighs 500 tons. Nobody knows how, why and when this megalith was created. There are also no historical records about it.

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The ancient world fascinates with its mysteries. A huge number of megaliths are found on almost all continents. Massive stones that defy explanation were once mined, transported and installed. Modern science considers this impossible, since people of that time could not have such advanced technologies.

Evidence of misplaced megaliths can be found all over the planet, and some of the most incredible are found in modern-day Turkey. The ruins of Krahan and Göbekli Tepe are proof that more than 12,000 years ago, very advanced civilizations existed on Earth, which, according to modern scientists, is simply impossible.

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However, amazing megaliths are found not only in modern Turkey. They can be found in South, Central and North America, as well as in Europe and Asia.

One of the most unseen megalithic out of place structures is located in Japan and it is called Ishi-no-Hoden. This massive cubic rock has a colossal weight – more than 500 tons. However, despite numerous studies, its history is shrouded in mystery.

Its dimensions are such that Ishi-no-Hoden is eight times heavier than the heaviest stone used in the construction of the Great Pyramid of Giza.

The megalith measures about 7 meters (22.97 ft) long and 6.5 meters (21.33 ft) wide. It is located in the center of the pond, giving the viewer the impression that a megalithic block is floating in the air.

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Located about 100 kilometers from the city of Asuka, Ishi-no-Hoden is an ancient treasure. Its name translates as Stone Sanctuary.

There are no historical records of this stone, and modern experts believe that the megalith was made in the so-called Jōmon period.

This is the oldest known prehistoric period in Japan and dates back to between 14,000 and 200 BC. What further shrouds the Ishi-no-Hoden in mystery is that no tool or artifact has been found near it to indicate how it was created or used.

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The megalith is made of hyaloclastite, a type of hydrated stone rich in black volcanic glass that formed as a result of underwater or subglacial volcanic activity during the span of roughly 70 million years.

It lies in a mountainous area called Hodenyama, a place from where Yongsan stone had been extracted for centuries. This type of stone is still being used at present for various constructions such as stone bridges, sarcophagi or different landscaping works.

Almost a decade ago, the Yongsan quarry became a historical site protected by the Japanese law.

Other than the aforementioned site there is no evidence regarding the creation of this megalith besides Japanese folklore that attributes the work to the gods Ookuninushi and Sukunabikona who were on a mission to build a castle on Hodenyama Mountain in a single night.

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Due to the rebellious act of a local god, they were forced to abandon their work.

Ookuninushi is one of the central deities in the early Japanese chronicles of myths and legends titled the Kojiki. Alongside him in the central pantheon were the sun goddess Amaterasu and her brother, the wild god Susanoo.

At present, the monument is a shrine dedicated to Oshiko Jinja Shinto.

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Jake Carter

Jake Carter is a researcher and a prolific writer who has been fascinated by science and the unexplained since childhood. He is always eager to share his findings and insights with the readers of, a website he created in 2013.