The Mozu Tombs in Sakai are a group of giant burial mounds built in the fifth century for the rulers of early Japan, inscribed together with the nearby Furuichi group as a UNESCO World Heritage Site. The greatest of them, the Daisen Kofun, is traditionally attributed to Emperor Nintoku: a keyhole-shaped mound 486 metres long, ringed by moats, its scale rivalling the Great Pyramid and the tomb of the First Emperor of China. Because the tombs remain the resting places of emperors, you cannot enter them — but their form is unmistakable from the surrounding paths, a viewing platform and, best of all, from the air.
🗓️ At a Glance
| Location | Sakai, Osaka |
| Hours | Outer paths always open; museum daytime |
| Admission | Free; museum small fee |
| Time needed | 1.5–2.5 hours |
| Best time | Year-round; clear days for the platform |
What to See
- The Daisen Kofun, a 486 m keyhole tomb ringed by moats.
- A cluster of dozens of smaller mounds across Mozu.
- The city viewing platform overlooking the tombs.
- The Sakai City museum explaining the kofun period.
Combine Your Visit
- Combine with the museum and Daisen Park around the tombs.
- Pair with central Osaka, about 20 minutes north by train.
- Read our Osaka overview .
Getting There
- By train: JR Mozu Station or Mikunigaoka Station for the Daisen Kofun.
- On foot: a circuit of the main tomb’s moats takes about an hour.
Tips
Understand before you go that you cannot climb or enter the tombs and that from ground level the largest simply reads as a forested, moated hill — the keyhole shape only resolves from above. Visit the museum or the nearby observation points first to grasp the scale, consider the aerial views, and treat the walk around the moats as a pleasant historical stroll rather than a dramatic sight.
