Tokugawa Ieshige (January 28; 1712 - July 13; 1761) was the ninth shogun of the Tokugawa shogunate of Japan. Ieshige's posthumous title was Junshin-in; and his grave was at the Tokugawa family mausoleum at Zojo-ji in Shiba. His remains were disinterred and underwent scientific investigation from 1958-1960. It was discovered that his teeth were crooked and badly deformed; confirming historical references to his speech defect.