The Mozu Tombs (百舌鳥古墳群, Mozu kofungun) are a group of kofun (Japanese: 古墳)—megalithic tombs—in Sakai, Osaka Prefecture, Japan. Originally consisting of more than 100 tombs, fewer than 50% of the key-hole, round, and rectangular tombs remain.
The Daisenryo Kofun (大仙陵古墳, Daisenryō kofun), the largest kofun in Japan, is believed to have been constructed over a period of 20 years in the mid 5th century during the Kofun Period. While it cannot be accurately confirmed, it is commonly accepted that the tomb was built for the late Emperor Nintoku. The Imperial Household Agency of Japan treats it as such.