Yanagisawa Yoshiyasu

[1] The Yanagisawa house traced descent to the "Kai-Genji," the branch of the Minamoto clan which had been enfeoffed with the province of Kai in the eleventh century.

Yoshiyasu served Tsunayoshi from an early age, becoming his Wakashū and eventually rose to the position of soba yōnin.

He had an adopted son named Yanagisawa Yoshisato by Tokugawa Tsunayoshi with Yoshiyasu's concubine, Sumeko.

[citation needed] Yanagisawa is the subject the diary memoir of his concubine Ōgimachi Machiko (正親町町子, 1675 - 1724), Matsukage no nikki ('In the Shelter of the Pine'), which gives a detailed account of Yoshiyasu's glory during the period 1685-1709 modelled on the Eiga Monogatari and in a writing style inspired by The Tale of Genji.

[citation needed] Other details of Yanagisawa's life, however, are portrayed fairly accurately, including his relationship to the shōgun.