Hōraisan Kofun

Den'en Chōfu, Japan

Freely accessible

Public space — no opening hours to check.

Strollie cannot guarantee access — always check before you travel.

Hōraisan Kofun is a zenpō-kōen-fun (keyhole-shaped mound tomb) located in Den'en Chōfu, Tokyo, constructed around 400 CE. This earthen monument exemplifies the distinctive Japanese burial architecture of the Kofun period, characterized by its keyhole form—a circular burial chamber adjoined to a rectangular platform. Designated as a historic site of Tokyo, Hōraisan Kofun preserves an important record of early Japanese funerary practices and monumental construction.