Siege of Kōzuki Castle
Part of the Sengoku period
Date1578
Location
Kōzuki Castle, Harima Province
Result Siege succeeds; Mōri victory
Belligerents
forces of Mōri Terumoto
Ukita clan		 force loyal to Oda Nobunaga
Amago clan
Commanders and leaders
Kobayakawa Takakage
Kikkawa Motoharu
Ukita Tadaie		 Amago Katsuhisa †
Yamanaka Yukimori Surrendered

The Siege of Kōzuki Castle (上月城の戦い, Kōzuki-jō no Tatakai) occurred in 1578, when the army of Mōri Terumoto attacked and captured the castle of Kōzuki in Harima Province. Kōzuki had been taken by Toyotomi Hideyoshi the previous year and entrusted to Amago Katsuhisa. When it fell to the Mōri, Amago committed hara-kiri. Amago's loyal and heroic general Yamanaka Yukimori was captured and executed.[1]

Background

Oda Nobunaga was running out of qualified battle-hardened lords to hold his territories, so Amago Katsuhisa though a member of the Amago clan samurai class, who was not especially experienced or trained as a warrior, he was called to become lord of Kōzuki castle from Kyoto, where he was studying to be a Buddhist monk.

Siege

Mōri Terumoto sent the Mōri's "Two Rivers", Kobayakawa Takakage and Kikkawa Motoharu to attack Kōzuki castle. The Amago forces under Yamanaka Yukimori were so vastly outnumbered and surrounded in the castle that victory was impossible. Yukimori sent a message to the Mōri general offering to surrender, and offering the ritual suicide of his master (Amago Katsuhisa). The offer was accepted, Amago forces surrendered, and Katsuhisa committed suicide.

Aftermath

Katsuhisa was very young, in his early twenties, when he died. A memorial stone stands with his name engraved, along with Buddhist inscriptions, where he killed himself.

It is popularly believed in Japan that Yamanaka Yukimori, Amago's general, "sold" Amago's life, for the safety of his own.

What precisely happened to Yamanaka Yukimori after the battle is unclear. Though some sources say he died in the battle, others state that he became a vassal of the enemy lord, Mōri Terumoto, but was assassinated on Mōri's order (along with his new wife).

References

  1. ↑ Turnbull, Stephen (1998). The Samurai Sourcebook. London: Cassell & co. p. 230. ISBN 9781854095237.


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