The designated tomb of Prince Otsu on Mt. Nijo's male peak at Someno, Katsuragi. It is known through Man'yoshu elegies. Katsuragi City's guide says Prince Otsu, the third son of Emperor Tenmu, was accused of treason at the age of 24.
Finds & research
The public sources consulted do not record a burial facility or finds.
Official status & archaeological view
Official status
Managed by the IHA as the Futakamiyama Tomb of Prince Otsu, a son of Emperor Tenmu, atop Mt. Nijo's male peak (517m).
Attribution (jitei): the Imperial Household Agency's determination of whose tomb it manages — separate from heritage designation.
Archaeological view
An IHA-designated tomb on the summit of Mt. Nijo's male peak. Public evidence does not establish an archaeological mound form, size, date, burial facility, or finds. Separately from the designation, Katsuragi City notes a theory that Toritaniguchi Kofun at the foot of the mountain is the prince's grave recorded in the Man'yoshu. Prince Otsu was accused of treason and put to death, and the Man'yoshu preserves elegies by his elder sister, Princess Oku.
Field notes
About 1.5–2 hours on foot to the summit from Kintetsu Nijojinjaguchi or Taimadera Station.