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Adachi · JP

Shirahatazuka Heritage Park

Tucked into a quiet residential corner of Adachi, Shirahatazuka Heritage Park (白旗塚史跡公園) guards one of Tokyo's oldest and rarest sights: a small keyhole-free round burial mound—a kofun—raised sometime in the 6th century. The tree-crowned tumulus, some 12 metres across and 2.5 metres high, is the sole survivor of a cluster of ancient mounds that once lined the Keja River lowlands, and it is now a designated Tokyo Metropolitan Historic Site. Around it the ward has created a gentle, free public park where haniwa clay-figure replicas, an ancient-character stone monument and a meadow of autumn wildflowers turn a neighbourhood green space into a pocket-sized open-air museum of the Kofun age. It is the kind of place that rewards curiosity rather than grand expectations. You cannot climb the mound or enter the burial chamber—which has in fact never been archaeologically excavated—but you can circle its moat, read the story in its name, and pick out the charmingly lopsided haniwa figures the ward placed around the grounds to spark interest in the buried past underfoot.