Simplify the following text for a Grade 5 native English-speaking person.
Original: Tokugawa Yoshimune ( å 3\/4 å å å -- Tokugawa Yoshimune , November 27 , 1684 - July 12 , 1751 ) was a shogun of Japan . He was the eighth shogun of the Tokugawa shogunate .
Simplified: Yoshimune was not the son of any former shogun .