Sosan Kofun

Overview

Sosan Kofun stands as the largest and arguably most important kofun within the central cluster of the Makimine Kofun Group. While a north-facing keyhole-shaped tumulus, its central axis subtly deviates northeastward. The tumulus's three-tiered structure features increasingly steep slopes as they ascend. These slopes are covered with andesite gravel and stones. Both the front and rear sections feature square projections. The rear circular mound, sadly looted in the Meiji period, remains largely a mystery in terms of its internal structure. However, excavations have yielded invaluable artifacts: figurines including house-shaped and waterfowl *haniwa* (clay figurines) from an island-like structure within the mound, and a funerary boat used to transport the deceased, discovered at the bottom of the moat in the northeast corner. These artifacts are now displayed at the Koryo-cho Cultural Property Preservation Center, offering precious insights into the lives and culture of ancient people. The identity of Sosan Kofun's occupant remains a captivating enigma. Uniquely among the large kofun in the central cluster—remarkably lacking any imperial tombs—speculation points to the burial of a king or prince from the Katsuragi clan lineage. The inclusion of projections on the circular mound, common in scallop-shaped kofun and used as ritual spaces, is another distinctive feature, setting it apart from the northern and southern clusters. While access to the tumulus itself is currently restricted, visitors can still enjoy a stroll along the moat and explore the unearthed treasures at the preservation center, fostering a connection to this ancient wonder. The surrounding area includes Makimine Hill Park, providing a blend of history and natural beauty. Immerse yourself in the ancient history of Sosan Kofun; you won't be disappointed!