Sanjōzuka Kofun

Futtsu, Japan

Freely accessible

Public space — no opening hours to check.

Strollie cannot guarantee access — always check before you travel.

Sanjōzuka Kofun is a zenpō-kōen-fun (keyhole-shaped mound tomb) located in Futtsu, Chiba Prefecture, Japan, dating to around 600 CE. This architectural form, distinctive to the Kofun period of Japanese prehistory, features the characteristic keyhole silhouette—a circular mound paired with a rectangular platform—that typifies elite burial monuments of early Japan.