鳥谷口古墳 

The Toritaniguchi Tumulus was made on top of the ridge of Mt. Nijyo.  It was discovered in 1983 during  construction work.  It was named Toritaniguchi Tumulus after the village. 

It is a 7-meter-square tumulus, and the burial site is a small stone room called "Yokoguchishiki Sekikaku”, with a stone cover on top with an entrance on the side.

As soon as it was discovered, researchers started to investigate the tumulus. They found that it was made in the mid to late 7th century. However, they could not find any relics to identify who was buried there.

Speaking of Mt. Nijyo, there is a poem in Manyoshu, Japan's oldest anthology of poems, composed by Okunohimemiko for her brother Otsunomiko, the third prince of Emperor Tenmu: 

I, a living person, From tomorrow on, 

Would look at Mt. Futakami, 

As my brother’s back

 

  In the preface to this poem, it was written: “It is a poem by Okunohimemiko regretting the death of her  brother, when Otsunomiko’s body was reburied in Mt. Nijyo”.

  Although presently the prince’s tomb is believed to be at the summit of Odake of Mt. Nijyo, it is highly possible that this tumulus is the tomb of Otsunomiko.

 

Location: Someno, Katsuragi City

Access: 30 minutes’ walk westward from the Kintetsu Taimadera Station