Siege of Arai

The siege of Arai (新井城の戦い) was among the first steps taken by Hōjō Sōun towards becoming one of the most powerful warlords of Japan's Sengoku period. After attacking Kamakura in 1512, Hōjō turned to Arai castle, on Miura Peninsula, to the south, which was controlled by Miura Yoshiatsu.

Siege of Arai
Part of the Sengoku period
Date July 11, 1516 Location Arai castle, Sagami Province Result Hōjō victory
Belligerents
Miura clan Uesugi clan	forces of Hōjō Soun
Commanders and leaders
Miura Yoshiatsu † Miura Yoshimoto † Uesugi Tomooki	Hōjō Soun
Strength
6,000	9,000

Miura Yoshiatsu's son Yoshimoto, believing defeat to be inevitable, killed himself by chopping off his own head.^[1]