Kai-hime

("hime" means lady, princess, woman of noble family), speculated to have been born in April 15, 1572, was a Japanese female warrior, onna-musha from the Sengoku Period. She was a daughter of and granddaughter of Akai Teruko, retainers of the Later Hōjō clan in the Kantō region. She is known as the heroic woman who helped her father's resistance at Oshi Castle against Toyotomi Hideyoshi's army during the siege of Odawara. After the war, she became one of the wives of Hideyoshi. She was known for her bravery and beauty. According to the chronicle of Narita clan, she was praised as "The most beautiful woman in east Japan".（東国無双の美人）

==Biography== left|thumb|260x260px|Oshi Castle In June 1590, Ishida Mitsunari led a 20,000-man army to take Oshi Castle. Mitsunari started to build a large embankment, and completed this embankment in a week. He placed his headquarter at the top of old tomb near the castle, and ordered to pour water into the castle. In a moment Oshi castle was filled with water, and inside people had to evacuate to higher place. The moats around the castle rejected the water attack. The embarkaments built by Toyotomi's men were used against them. Kaihime broke the dikes near the castle, causing massive damage to the Toyotomi army. Owing to lack of foresight and planning, Mitsunari troops was devastated by the water attack.