- Reign: 475-393BC
- Born: 507/508BC
- Period: Legendery Period
- Family: Emperor Itoku (father) Amatoyotsuhime (mother) Yosotarashi hime (wife) Emperor Kōan (son) Ameoshitarashihiko (son) Takeshihiko (brother)
- Burial place: misasagi on Hakatayama in Waki no Kami
- Order of Succession: Predecessor Emperor Itoku * Successor Emperor Kōan
Emperor Kōshō was one of two sons of Emperor Itoku and Amatoyotsuhime.12 Kōshō would go on to marry Yosotarashi hime123 and together they would have two sons, these being the future Emperor Kōan and Ameoshitarashihiko.23
Ponsonby states he was made heir in the 12th year of his fathers reign.1
Events from his reign detailed in the Nihongi are as follows:
- 1st year, Spring, 1st month, 9th day Kōshō takes the throne.
- Summer, 4th month, 5th day. He gives the Empress the title Kodaigo.
- 7th month. The capital is moved to Waki no Kami, residing in the Palace Ikegokoro.
- 29th year, Spring, 1st month, 3rd day. Yosotarashi hime is made Empress.
- 68th year, Spring, 1st month, 14th day. Kōan is made heir.
- 83rd year, Autumn, 5th day. Kōshō passes away.2
He was buried in his masasagi in the 38th year, Autumn, 8th month, 146th day of the reign of Emperor Kōan.2
1. Ponsonby, F. (1959) “The Imperial House of Japan.” Kyoto: Ponsonby Memorial Society.
2. Aston. W.G. (1896) “Nihongi Volume 1: Chronicles of Japan from the Earliest Times to AD697”. Tuttle Publishing.
3. Chamberlain, B. H. (1932) “Translation of the Kojiki.” Kobe: J.L. Thompson & Co.
4. Varley, H.P (1980) “A Chronicle of Gods and Sovereigns: Jinnō Shōtōki of Kitabatake Chikafusa.” New York: Columbia University Press.
5. Yasumaro. O, translated by Gustav Heldt. (2014) “Kojiki. An Account of Ancient Matters”. New York: Columbia University Press.
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