The Mozu-Furuichi Kofun Group in Osaka is a collection of tombs of ancient rulers, which was registered as a UNESCO World Heritage Site in 2019. Such burial mounds are mainly found in the Kansai region, built during the Kofun period between the 3rd and 7th century, but they can also be found scattered all over Japan. The Mozu-Furuichi Kofun Group has 49 burial mounds. The largest of the mounds is about 500 meters across, which larger than the base of the Pyramid of Khufu in Giza, Egypt or the Mausoleum of the First Qin Emperor in China, and is counted as one of the world's three major tombs. Looking from above. many of the burial mounds have a unique keyhole shape.