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Posthumous name
	Tsuigō:; Emperor Kōgon (光厳院 or 光厳天皇)

Emperor Kōgon
光厳天皇
Emperor Kōgon; 光厳天皇
1st Northern Emperor
Reign	October 22, 1331 – July 7, 1333
Predecessor	Go-Daigo
Successor	Kōmyō
Born	August 1, 1313
Died	August 5, 1364 (aged 51)
Spouse	Princess Yoshiko [ja]; Princess Hisako
Issue; among others...	Emperor Sukō; Emperor Go-Kōgon
Posthumous name
Posthumous name
	Tsuigō:; Emperor Kōgon (光厳院 or 光厳天皇)
House	Imperial House of Japan
Father	Emperor Go-Fushimi
Mother	Saionji (Fujiwara) Neishi
Signature

Emperor Kōgon (光厳天皇, Kōgon-tennō, August 1, 1313 – August 5, 1364) was the first of the Emperors of Northern Court during the Period of the Northern and Southern Courts in Japan. His reign spanned the years from 1331 through 1333.^[1]

Genealogy

Before his ascension to the Nanboku-chō throne, his personal name (his imina) was Kazuhito-shinnō (量仁親王).^[2] He was the third son of Emperor Go-Fushimi of the Jimyōin line. His mother was Kōgimon'in Neishi (広義門院寧子). He was adopted by his uncle, Emperor Hanazono. His family included:

Empress: Imperial Princess Yoshiko (懽子内親王) later Senseimon-in (宣政門院), Emperor Go-Daigo’s daughter
- Second daughter: (b. 1335)
- Third daughter: Imperial Princess Mitsuko (b. 1337; 光子内親王)
Consort: Imperial Princess Hisako (寿子内親王) later Kianmon-in (徽安門院), Emperor Hanazono’s daughter
Lady-in-waiting: Sanjō Shūshi (三条秀子) later Yōrokumon’in (陽禄門院), Ogimachi Sanjo Kinhide's daughter
- First daughter: (b. 1333)
- Princess
- First son: Imperial Prince Okihito (興仁親王) later Emperor Sukō
- Second son: Imperial Prince Iyahito (弥仁親王) later Emperor Go-Kōgon
Naishi: Ima-no-kata, Saionji Sanehira's daughter
Naishi: Dai-no-kata, Saionji Saneakira's daughter
- Fourth Son: Imperial Prince Sonchō (1344–1378; 尊朝親道親王)
- Princess
Naishi: Ichijo-no-tsubone, Ogimachi Kinkage's daughter
- Imperial Prince Yoshihito (died 1415; 義仁親王)
Naishi: Oinomikado Fuyuuji's daughter
- daughter: (1331–1402)
Unknown
- Daughter: Hanarin Songen (d. 1386; 華林恵厳)

Events of Kōgon's life

In his own lifetime, Kōgon and those around him believed that he occupied the Chrysanthemum Throne from October 22, 1331^[3] until July 7, 1333.^[4] Kazuhito-shinnō was named Crown Prince and heir to Emperor Go-Daigo of the Daikakuji line in 1326. At this time in Japanese history, by decision of the Kamakura shogunate, the throne would alternate between the Daikakuji and Jimyōin lines every ten years. However, Go-Daigo did not comply with this negotiated agreement.

In 1331, when Go-Daigo's second attempt to overthrow the shogunate became public, the Shogunate seized him, exiled him to the Oki Islands, and enthroned Kōgon on October 22. Emperor Go-Daigo used the 17-petal chrysanthemum emblem during his exile. He escaped Oki in 1333, with the help of Nawa Nagatoshi and his family, and raised an army at Funagami Mountain in Hōki Province (the modern town of Kotoura in Tōhaku District, Tottori Prefecture). Meanwhile, Ashikaga Takauji (足利尊氏), the chief general of the Hōjō family, turned against the Hōjō and fought for Emperor Go-Daigo in the hopes of being named shōgun. Takauji attacked Hōjō Nakatomi and Hōjō Tokimasu, the Rokuhara Tandai, or chiefs of the Kamakura shogunate in Kyoto. They both fled to the east, but were captured in Ōmi Province. On July 7, 1333, Go-Daigo seized the throne from Emperor Kōgon and attempted to re-established Imperial control in what is referred to as the Kenmu Restoration (1333–1336). Go-Daigo's attempt failed, however, after Ashikaga Takauji turned against him.

In 1336, Takauji installed Kōgon's younger brother on the throne as Emperor Kōmyō. Go-Daigo fled to Yoshino, in Yamato Province and continued to lay proper claim to the throne, establishing what would come to be known as the Southern Court. Kōmyō's court remained in Kyoto and would come to be known as the Northern Court. This marked the beginning of the Northern and Southern Courts Period of Japanese history, which lasted until 1392.

In April 1352, taking advantage of a family feud in the Ashikaga clan known as the Kan'ō Disturbance, Emperor Go-Murakami of the Southern Court captured Kyōto, and carried away Emperor Kōgon, Emperor Kōmyō, Emperor Sukō, and the Crown Prince Tadahito. They finally ended up in Anau, the location of the Southern Court.^[5]

Following this, Kōgon was held under house arrest for the remainder of his life. In his final years, he converted to Zen Buddhism, and died on August 5, 1364.

Eras of Kōgon's reign

The years of Kōgon's reign are more specifically identified by more than one era name or nengō.^[6]

Pre-Nanboku-chō period

- Genkō (1331–1334)
- Kenmu (1334–1336)

Nanboku-chō Southern court

Eras as reckoned by legitimate Court (as determined by Meiji rescript)
- ...

Nanboku-chō Northern court

Eras as reckoned by pretender Court (as determined by Meiji rescript)
- Shōkei (1332–1338)

Southern Court Rivals

Emperor Go-Daigo

Ancestry

Ancestors of Emperor Kōgon^[7]

16. Emperor Go-Saga (1220-1272)

8. Emperor Go-Fukakusa (1243-1304)

17. Fujiwara no Kitsushi (1225-1292)

4. Emperor Fushimi (1265-1317)

18. Tōin Saneo (1219-1273)

9. Tōin Inshi (1246-1329)

19. Fujiwara Kurako

2. Emperor Go-Fushimi (1288-1336)

10. Itsutsuji Tsuneuji

5. Itsutsuji Tsuneko (d. 1324)

1. Emperor Kōgon

24. Saionji Kinsuke (1223-1267)

12.Saionji Sanekane (1249-1322)

25. Nakahara

6. Saionji Kinhira (1264-1315)

26. Nakanoin Michinari (1222-1287)

13. Nakanoin Akiko

3. Saionji Neishi/Yasuko (1292-1357)

14. Fujiwara Mitsuyasu

7. Fujiwara Kaneko

Notes

^ "コトバンク「光嚴天皇」". Retrieved 2017-07-23.
^ Titsingh, p. 286.
^ The twentieth day of the ninth month of the third year of Gentoku, according to the traditional lunisolar calendar
^ The twenty-fifth day of the fifth month of the second year of Shōkei, according to the traditional lunisolar calendar
^ Sansom, George (1961). A History of Japan, 1334–1615. Stanford University Press. p. 88. ISBN 0804705259.
^ Titsingh, p. 286.
^ "Genealogy". Reichsarchiv (in Japanese). 30 April 2010. Retrieved 5 December 2020.