Sugiyama Castle

En un regard

Le château en bref

Sugiyama has become famous for a question its layout puts to specialists: how do you date an earthen fortress so sophisticated that it seems ahead of its time? The hill overlooks the Kamakura road, on the far side of the Ichinogawa. Around ten enclosures radiate from a central stronghold over about 14 hectares according to Ranzan town, with zigzag ramparts, entrances exposed to flanking fire and constrained routes. For a long time this mastery of terrain led to the work being attributed to the Hōjō. Excavations begun in 2002 changed the discussion: the finds, including some 3,759 objects recovered from the main enclosure alone according to secondary summaries, point to the late fifteenth or early sixteenth century, and the town favors construction in the context of the rivalry between the Yamanouchi and Ōgigayatsu branches of the Uesugi. A copy of a letter by Ashikaga Takamoto mentioning a "camp of Sugiyama" around 1520 would support this. The matter is not closed, however: what is known as the "Sugiyama problem" remains debated, with some judging a ceramic-based dating to be fragile, and a 2017 book by Nishimata Fusao revisits it through analysis of the plan. The local tradition naming Kaneko Mondo as founder rests on no historical source. Since 2008 the site has belonged to the protected Hiki castle group; no reconstruction is reported there, and it is the ground itself that teaches the visitor.