日岡古墳, Ancient burial mound in Ukiha, Japan.
The Hioka Kofun is a burial mound in Ukiha with a distinctive keyhole shape formed by circular and rectangular sections. The site is surrounded by moats and measures approximately 74 meters in total length.
This mound was built in the 6th century and belongs to the Kofun period when regional leaders across Japan constructed elaborate tombs. That era marked a time when such structures reflected the power and status of local elites.
The decorated chamber shows wall paintings with geometric patterns, weapons, fish, boats, and horses in red, white, green, and blue. These images reveal what mattered to the people who created this burial place.
The site is accessible on foot from Chikugo-Yoshii Station or from Kamiyoshii bus stop. The interior chamber can be viewed from an elevated observation platform where the stone structure is visible from above.
A large fallen ceiling stone inside allows visitors to view the chamber structure from above in a way rarely possible at other burial sites. This offers an unusual glimpse into how these tombs were originally built.
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