Siege of Ōtsu

1600 battle in Japan

Siege of Ōtsu

Part of the Sengoku period
| Date| 1600

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Location|

Ōtsu, near Kyoto

Result|  Mōri victory
Territorial
changes|  Castle falls to Western forces
Belligerents
Western forces;
forces of Mōri Terumoto|  Eastern forces;
castle garrison loyal to Tokugawa Ieyasu
Commanders and leaders
Kobayakawa Hidekane
Tachibana Muneshige
Tsukushi Hirokado|  Kyōgoku Takatsugu

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Sekigahara Campaign

* Ueda
* Fushimi
* Ōtsu
* Shiroishi
* Hataya
* Kaminoyama
* Hasedō
* Tanabe
* Kuisegawa
* Gifu
* Sone
* Sekigahara
* Minakuchi
* Udo
* Yanagawa

The siege of Ōtsu (大津城の戦い, Ōtsu-jō no tatakai) took place in 1600, concurrent with the battle of Sekigahara. Kyōgoku Takatsugu held Ōtsu castle for the Tokugawa, and commanded the garrison.

Mōri Terumoto and Tachibana Muneshige laid siege. The sides negotiated and Takatsugu surrendered. However, in the meantime Tokugawa Ieyasu had won the battle of Sekigahara, assuring his control of all Japan, and so the loss of Ōtsu was ultimately insignificant.[citation needed]

Some records of the time indicate that the local inhabitants brought picnic boxes and gathered at Mii-dera on Mount Hiei to observe the battle.[citation needed]

## Historicity

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According to the records from "History of Yamaguchi Prefecture", and 56 documents from the "Documents of the Asa Mori Family, Sanyo Town Asa Library", Mōri Terumoto dispatched Kobayakawa Hidekane and Tachibana Muneshige from Hekiteikan as reinforcements for Mōri Motoyasu's army to capture Ōtsu Castle, which surrounded by a double moat and defended by Kyogoku Takatsugu, Tokugawa Hidetada's brother-in-law. On the 12 September, when Hidetsugu and Muneshige's reinforcements arrived, they held a military council and decided to launch an all-out attack on the 13 September. At dawn, they began a moat-crossing operation to fill in the outer moat on three sides of the castle. According to Hidetsugu's records, "the castle fell in the evening," and Takatsugu surrendered in that day. The "Otsu Castle Memorial Monument" at Koyasan Okunoin is engraved which supported that the castle were fallen on 13 September.[1]

However, according to the official history records of Tokugawa shogunate, the Kyōgoku Takatsugu forces had fought well to defend the for Castle, and only fallen in 14 September. Judging by this contradiction of the records, the history researchers society from Bingo suspected there is an attempt to downplay the achievements of Muneshige and Motoyasu achievement in capturing the castle, to cover the disgraceful fact that Takatsugu, a figure close to the second shogun of Tokugawa clan, beaten easily in the siege. Further indication was stated by the research team representative that despite victory of Muneshige and Motoyasu were nullified as the overall Sekigahara Campaign was won by the Tokugawa side, Takatsugu were transferred somewhere in July 1619 by Hidetada and the governorship of Kannabe was replaced with Mizuno Katsunari. Katsunari was considered by Hidetada as the best person to control the region as he has reputation as strong military general who could help stabilize the Shogunate presence in Bingo Province and keeping the Mōri clan in check.[1]

## References

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1. ^ a b Kobayashi Sadaichi (小林定市) (2006). "徳川秀忠を畏怖させた猛将（抹消された毛利元康の事績）". Bingo History. Bingo History Exploration: Issue 128 (in Japanese). 備陽史探訪の会. Retrieved 17 June 2024.

* Turnbull, Stephen (1998). 'The Samurai Sourcebook'. London: Cassell & Co.

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