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The pair of Kizugawaguchi Battles took place during Oda Nobunaga's endeavors to besiege the Ishiyama Hongan-ji in Osaka. Serving as the stronghold of the Ikko-ikki, a coalition of warrior monks, priests, and farmers in opposition to Oda's rule, the Hongan-ji posed a formidable challenge. To counter the Ikko-ikki's attempts to supply the fortress and break the siege, Oda commanded Admiral Kuki Yoshitaka to organize a blockade against their allies' fleets. Among the opposition were influential families, notably the Mori Terumoto from the Mori clan in neighboring provinces.

First Battle

In the initial clash in 1576, the Mori navy, led by Motoyoshi, the son of Murakami Takeyoshi, achieved victory over Kuki Yoshitaka's fleet. This defeat broke the blockade, allowing supplies to reach the fortress. Both sides employed firearms, a relatively new aspect of Japanese warfare. However, Mori's naval expertise and tactical knowledge proved decisive in this encounter.

Second Battle

Two years later, in 1578, with the Ishiyama Hongan-ji still under siege, Oda's fleet, under the command of Takigawa Kazumasu, coordinated a renewed effort. This time, Kuki Yoshitaka led six sizable o'atakebune ships against the Mori navy, deviating from the conventional use of a combination of small (kobaya), medium (sekibune), and large (adakebune) vessels. Typically, atakebune were floating wooden fortresses equipped with gun and bow emplacements. Some accounts suggest that these six vessels might have been Tekkosen, early ironclads designed to resist penetration by enemy weapons. However, it is likely that these crafts featured limited iron plating in specific areas rather than being entirely composed of metal.

During the battle, several Mori vessels under Murakami Takeyoshi were set ablaze and sank, ultimately resulting in victory for Oda's fleet. The supply lines were successfully severed, leading to the eventual fall of the Hongan-ji. However, a flaw in the Tekkosen design surfaced as Mori samurai rushed to board the large ship, causing it to capsize due to a shift in the center of gravity.

Following this triumph, Yoshitaka went on to defeat the Mori once again the following year.

 


See also 

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  • The Siege of Nagashino Castle

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