Satellite tomb "Chi-alt" (scallop-shaped, 36m long) of Daisen Kofun. 5th century. One of the smaller scallop mounds in the Daisen satellite group, suggesting a lower-ranking occupant in the hierarchy. Located on the northern periphery of Daisen Kofun. The name "Komoyamaduka" (Reed-Hill Mound) reflects the wetland environment that once surrounded this part of the Mozu plateau.Constituent monument of the "Mozu-Furuichi Kofun Group" UNESCO WHS (2019). The IHA uses two overlapping cataloging systems (iroha and kou-otsu) for Daisen's satellites, reflecting the fact that satellite designations were established in multiple stages. The inclusion of small satellites like this mound in the World Heritage designation underscores the global recognition of the Mozu group's value as an integrated ensemble of burial mounds rather than a collection of individual monuments.
Finds & research
No excavation permitted under IHA mausoleum regulations. Internal structure and grave goods remain unknown. Exterior viewable from public paths.
Two views on the occupant
Archaeological view
Satellite tomb "Chi-alt" of Daisen Kofun. A scallop-shaped mound, 36m long. 5th century. A smaller scallop mound suggesting a relatively lower-ranking satellite occupant. The duplication of the "Chi" catalog number with Gennuemonyyama Kofun reflects the complexity of IHA satellite mound administration. The name "Komoyamaduka" (Mound of the Komoyama, where komo/makomo reeds grow) suggests the ancient surroundings were wetlands or waterside terrain.
Imperial Household Agency view
Managed by the IHA as "Satellite Tomb Chi (Alternate)" of the Nintoku Mausoleum. Since another mound (Gennuemonyyama) is also cataloged as "Chi," this mound is distinguished as "Chi-hirokuchi" (a second Chi designation at a detached location). Managed as a separate detached IHA enclosure.