From his childhood due to his sagacity, he bore on his shoulders the expectations of his grandfather, Yoshimune TOKUGAWA, who was the 8th Shogun, and was brought up as a favorite with his grandfather.
幼少時よりその聡明さから、第8代将軍であった祖父・徳川吉宗の期待を一心に受け寵愛されて育った。