reigned from 1334 to 1338 and was one of two Seii Taishogun

Shogun

A was one of the hereditary military dictators of Japan from 1192 to 1867. In this period, the shoguns, or their shikken regents , were the de facto rulers of Japan though they were nominally appointed by the emperor...

 during the Kemmu Restoration

Kemmu restoration

The is the name given to both the three year period of Japanese history between the Kamakura period and the Muromachi period, and the political events that took place in it...

. He was also Crown Prince in 1336 (one month).

He was a son of the Emperor Go-Daigo

Emperor Go-Daigo

Emperor Go-Daigo was the 96th emperor of Japan, according to the traditional order of succession....

 and Fujiwara no Renshi (Ano Renshi) (藤原廉子/阿野廉子), daughter of Ano Kinkado. His brothers-uterine were Crown Prince Tsunenaga

Prince Tsunenaga

' was one of the sons of Japanese Emperor Go-Daigo. He became involved in the Nanboku-chō wars between the true Imperial line and the Ashikaga clan....

 and Emperor Go-Murakami

Emperor Go-Murakami

was the 97th emperor of Japan, according to the traditional order of succession, and a member of the Southern Court during the Nanboku-chō period of rival courts. He reigned from September 18, 1339 until March 29, 1368 . His personal name was...

. In 1336 Prince Narinaga became Crown Prince of Emperor Kōmyō

Emperor Komyo

was the 2nd of the Ashikaga Pretenders, although he was actually the first to be supported by the Ashikaga Bakufu. According to pre-Meiji scholars, his reign spanned the years from 1336 through 1348.-Genealogy:...

 when Emperor Kōmyō made peace with his father Emperor Go-Daigo

Emperor Go-Daigo

Emperor Go-Daigo was the 96th emperor of Japan, according to the traditional order of succession....

 for the meantime, but when Emperor Go-Daigo escaped to Yoshino with the Imperial Regalia of Japan

Imperial Regalia of Japan

The , also known as the Three Sacred Treasures of Japan, consist of the sword Kusanagi , the mirror Yata no Kagami , and the jewel Yasakani no Magatama...

 next month, Narinaga was deposed. He was killed by Ashikaga Tadayoshi

Ashikaga Tadayoshi

was a general of the Northern and Southern Courts period of Japanese history and a close associate of his elder brother Takauji, the first Muromachi shogun. Son of Ashikaga Sadauji and of a daughter of Uesugi Yorishige, the same mother as Takauji, he was a pivotal figure of the chaotic transition...

 along with his brother deposed Crown Prince Tsunenaga

Prince Tsunenaga

' was one of the sons of Japanese Emperor Go-Daigo. He became involved in the Nanboku-chō wars between the true Imperial line and the Ashikaga clan....

 in 1338 (according to Taiheiki

Taiheiki

The is a Japanese historical epic , written in the late 14th century. It deals primarily with the Nanboku-chō, the period of war between the Northern Court of Ashikaga Takauji in Kyoto, and the Southern Court of Emperor Go-Daigo in Yoshino....

), or, was placed with Konoe Mototsugu

Konoe Mototsugu

, son of Tsunehira, was a kugyō or Japanese court noble of the Kamakura period . He held a regent position kampaku from 1337 to 1338. With a daughter of sangi Fujii Tsuguzane he had a son Michitsugu.-References:...

after deposal and died in 1344 (according to Diary by Nakahara no Moromori, 師守記).