德川家宣
was a Confucianist, scholar-bureaucrat, academic, administrator, writer and politician in Japan during the middle of the Edo period, who advised the "shōgun" Tokugawa Ienobu. His personal name was Kinmi or Kimiyoshi (君美). Hakuseki (白石) was his pen name. His father was a Kururi han samurai Arai Masazumi (新井 正済).