Hōjō Sōun

Ise Sōzui (伊勢 宗瑞, 1432 or 1456 – September 8, 1519), also known as Hōjō Sōun (北条 早雲) was Japanese daimyo and the first head of the Later Hōjō clan, one of the major powers in Japan's Sengoku period. Although he only belonged to a side branch of the main, more prestigious Ise family, he fought his way up, gaining territory and changing his name in imitation of the illustrious Hōjō.[1]

Hōjō Sōun
北条 早雲
Soun Hojo portrait.jpg
portrait of Hōjō Sōun
Head of Later Hōjō clan
In office
Succeeded byHōjō Ujitsuna
Personal details
Born1432 or 1456
Takakoshi Castle, Ibara
DiedSeptember 8, 1519
Nirayama Castle, Izu Province, Japan
ChildrenHōjō Ujitsuna
Hōjō Genan
Military service
AllegianceJapanese crest Imagawa Akadori.svg Imagawa clan
Mitsuuroko.svg Later Hōjō clan
RankLord (Daimyō)
CommandsKōkokuji Castle
Nirayama Castle
Battles/warsIzu campaign (1491)
Siege of Arai (1516)


Traditionally Soun held a reputation of a rōnin who rose to power almost overnight in Kantō; however, he belonged to a prestigious family in the direct employment of the Ashikaga shogunate, and enjoyed important family connections. It has been said that Sōun was born at the Takakoshi castle in Okayama.[2] His sister was married to Imagawa Yoshitada, a major daimyō from a prestigious cadet branch of the Ashikaga family.

About 1475, under the cognomen of Ise Shinkuro, he worked for Imagawa, the constable of Suruga Province, and eventually became an "independent leader" with a number of warriors joining him.

Shinkuro became a retainer in the Imagawa clan, and when Yoshitada died in battle in 1476, Shinkurō mediated the succession dispute between supporters of Yoshitada's son Imagawa Ujichika and Yoshitada's cousin, Oshika Norimitsu. This proved a temporary peace. When Norimitsu again attempted to gain control of the Imagawa clan, Sōun came to Ujichika's defense, killing Norimitsu. Sōun was rewarded by Ujichika with Kōkokuji Castle.

In 1491, he was able to take Horigoye after the death of Kantō kubō Ashikaga Masatomo, gaining control of Izu Province. He then adopted the surname of Hōjō and the given name of Sōun or Sozui.

He gained control of Izu Province in 1493, avenging a wrong committed by a member of the Ashikaga family which held the shogunate. With Sōun's successful invasion in Izu province, he is credited by most historians as being the first "Sengoku daimyō".

After building a stronghold at Nirayama, Hōjō Sōun secured Odawara Castle in 1494, the castle which would become the center of the Hōjō family's domains for nearly a century. In an act of treachery, he seized the castle after arranging for its lord to be murdered while out hunting.[3]

In 1516, he laid siege to the castle of Arai,[4] and "was virtual master of all Sagami".[3]

Tomb of Hōjō Sōun at Sōun-ji Temple

In 1519, Sōun died in Nirayama Castle and passed on the newly built Hōjō domains to his son Ujitsuna,[1] who subsequently changed the clan name from the original Ise to Hōjō and posthumously renamed his father to Hōjō Sōun. In 1521, Ujitsuna built Sōun-ji temple dedicated to his father.


Statue of Hōjō Sōun
  • Father: Ise Morisada
  • Mother: Daughter of Isa Sadanori
  • Adoptive father: Ise Sadamichi
  • Wife: Nan’yoin-dono
  • Concubines:
    • Katsurayama-dono
    • Kennyoji-dono
  • Children:
    • Hōjō Ujitsuna by Nan’yoin-dono
    • Hojo Ujitoki (d.1531) by Nan’yoin-dono
    • Katsurayama Ujihiro (d.1538/1539) by Katsurayama-dono
    • Chosoin-dono married Miura Ujiin by Kennyoji-dono
    • Hōjō Genan (1493-1589) by Kennyoji-dono
    • Seishoin-dono by Kennyoji-dono


  1. ^ a b "北条早雲" (in Japanese). コトバンク. Retrieved 25 July 2019.
  2. ^ Sengoku Hōjō shi to Kassen. Tokyo: 戒光祥出版社. 2018. p. 2-5. ISBN 9784864032902.
  3. ^ a b Sansom, George (1961). A History of Japan, 1334–1615. Stanford University Press. pp. 243–245. ISBN 0804705259.
  4. ^ Turnbull, Stephen (1998). The Samurai Sourcebook. Cassell & Co. p. 208. ISBN 1854095234.