In 1705 May 10, Iizuka Someko (飯塚染子) died of a disease. She is Yanagisawa Yoshisato's (柳沢吉里・1687~1745) real mother, 39 years old then. Someko is also the first concubine of the Yanagisawa Yoshiyasu (柳沢吉保・1658~1714), who became a powerful chamberlain (sobayounin) at the 5th Shogun Tokugawa Tsunayoshi (Remain ; 1680~1709 / 1646~1709). In the first place, Yoshiyasu got married to Soshi Sadako (曽雌定子) in 1676. But about 10 years have passed since they married, they have not gotten a baby. At that time, Yoshiyasu was rising rapidly in the world, he had to get an heir, for in the Edo period, no heir clans cut down their homes and family names, so no heir situation was so to speak very risky situation. As a result of both Yanagisawa's and Soshi...