Koyanagawa
小梁川
Parent houseDate clan
FounderKoyanagawa Morimune
Founding year15th century
Ruled until1867
Cadet branches
  • Shiomori clan
  • Furuta clan

The Koyanagawa clan (小梁川氏, Koyanagawa-shi) was a samurai family in Japan descending from the Date clan, a daimyo (feudal lord) family in Mutsu Province.[1]

History

The third son of Date Mochimune, the 11th head of the Date clan, Date Morimune (1440 - November 19, 1500), took the name Koyanagawa from Koyanagawa, Date-gun, Mutsu Province.[1]

According to Date Seishin Kafu, Morimune gathered the Date clan vassals and led all the officials during the time when the 13th clan head, Morimune's nephew, Date Naomune, was aged from 3 to 15 (1455-1467).[1] However, this is considered impossible because not only the elder brother and 12th clan head, Date Narimune, but also Date Mochimune (died in 1469) were still alive at this time.[2]

In 1591, Date Masamune moved to Iwadeyama due to the Kasai Ōsaki Rebel, when the old territories of Nagai and Date were seized. At this time, Morimune also moved to Esashi-gun. During the Edo period, the Koyagawa clan further moved to Notezaki within the same province, and after that, the clan ruled the area until the Meiji Restoration.[1]

Genealogy

The Koyanagawa clan descends from Fujiwara no Yamakage's line of the Fujiwara clan's Hokke house through the Date clan. The patriarch of the Koyanagawa clan, Koyanagawa Morimune, was the third son of Date Mochimune, the 11th head of the Date clan.[1]

Clan heads

  1. Koyanagawa Morimune
  2. Koyanagawa Chikatomo
  3. Koyanagawa Chikamune
  4. Koyanagawa Morimune
  5. Koyanagawa Muneshige
  6. Koyanagawa Munekage
  7. Koyanagawa Muneyoshi　
  8. Koyanagawa Munehide
  9. Date Muraoki
  10. Koyanagawa Munenaga
  11. Koyanagawa Muneshige
  12. Koyanagawa Moriaki
  13. Koyanagawa Morisane
  14. Koyanagawa Moriaki
  15. Koyanagawa Yasumori
  16. Koyanagawa Moriyuki (later Date Kunimori)

See also

References

  1. 1 2 3 4 5 Ota, Akira (1934). Seishi Kakei Daijiten 2 (姓氏家系大辞典 第2巻). Seishi kakei daijiten kankō-kai. pp. 2417–2418.
  2. ↑ Yanagawa-cho-shi Hensan Iinkai-hen (1996). Yanagawa-cho-shi 1 (梁川町史 第1巻). Yanagawa-cho. p. 471.
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