The Relationship between Shiroishi and Sanada
During the summer campaign of the siege of Osaka in 1615, a fierce battle unraveled between Katakura Kojuro Kagetsuna and veteran Sanada Yukimura. Since then he was known to the world as Onikojuro (lit. Kojuro the Demon), “Vanguard of Date”.
Even though Katakura Kojuro Kagetsuna is the enemy general, Sanada Yukimura, realizing the potential Kagetsuna has to be a warrior of wisdom and courage, entrusted him with his children before the fall of Osaka Castle. Kagetsuna at that time not only has Oume, daughter of Anayama Kosuke under his care, but also young children (Oshoubu, Okane, Daihachi) that led a secluded life in Kyoto City. He secretly brought them up in the outer citadel of Shiroishi Castle (Daihachi was raised outside Shiroishi Castle).
Oume was later came to be known as Ouhime. She became Katakura Kojuro Shigenaga’s wife, and led a happy life together with him.
Oshoubu was later known as Oshoubuhime and became the wife of Tamura Sadahiro. Okane passed an early death while Daihachi took on the name of Katakura Shiro Bee Morinobu and became the vassal of Katakura Clan. He was later appointed the feudal retainer of Date and in 1712, during the times of second generation Tatsunobu, he restored his name of Sanada.
Even today, Shiroishi still has many historical ruins related to Sanada Yukimura.