Ishibutai Kofun

Ishibutai Kofun is the most striking of all the ancient monuments scattered across the Asuka countryside, and one of the most important archaeological sites in Japan. It is a megalithic tomb from the Asuka Period, built in the early 7th century, and it is widely believed to be the burial place of Soga no Umako — the powerful statesman who dominated the imperial court and helped establish Buddhism as a force in Japan before his death in 626.

What makes Ishibutai so unusual is that the earthen mound that once covered it has long since eroded or been removed, leaving the enormous stone burial chamber standing exposed to the open sky. Some thirty granite boulders were used in its construction, and the two capstones alone are estimated to weigh around 77 tons combined. The total mass of stone is thought to exceed 2,300 tons — a staggering feat of engineering for its era, hauled and levered into place without any modern machinery. The name Ishibutai, meaning 'stone stage,' comes from the broad flat surface of the top stones, which local legend says was once used by a dancing fox spirit, or alternatively by travelling performers.

Visitors can walk right up to the tomb and step down into the burial chamber itself. Inside, the sheer volume of the roof stones pressing overhead gives an immediate, visceral sense of the labour and ambition behind the structure. A drainage channel runs along the floor, and a reconstructed stone coffin sits nearby to show how the interior would have been furnished. The chamber is around 7.7 metres long, and standing within it is the closest most people will ever come to touching Japan's protohistoric age.

The setting is as memorable as the monument. Ishibutai sits in a gently terraced field ringed by low hills and rice paddies, with a border of cherry trees that erupt into blossom each spring and turn the site into one of Asuka's loveliest picnic spots. In 1935 it was designated a National Historic Site, and in 1954 it was elevated to the higher rank of Special Historic Site, reflecting its exceptional value.

Because Asuka was Japan's political heart in the century before the capital moved to Nara and then Kyoto, the whole village is effectively an open-air museum, and Ishibutai is its centrepiece. It pairs naturally with Asuka-dera, the Takamatsuzuka and Kitora painted tombs, and the enigmatic carved stones dotted through the fields.

Getting there: take the Kintetsu Yoshino Line to Asuka Station, then either rent a bicycle at the station — the flat, quiet lanes of Asuka are perfect for cycling — or ride the 'Kame' loop bus to the Ishibutai stop. The site is open daily and charges a small entrance fee. Come early on a clear morning, before the tour groups, and you may have this 1,400-year-old stone giant almost to yourself.