In 781, he died at the age of 58, and his body was buried in the tomb of Prince Kaijo located in today's Meiji no Mori Mino Quasi-National Park, Mino City, Osaka Prefecture.
781年（天応元年）に58歳で没し、大阪府箕面市の明治の森箕面国定公園内の開成皇子墓に葬られた。