What type of details about tokugawa ieshige  can be gathered from the following bio?  Bio: tokugawa ieshige ; 徳川 家重 -lrb- january 28 , 1712 -- july 13 , 1761 -rrb- was the ninth shogun of the tokugawa shogunate of japan . the first son of tokugawa yoshimune , his mother was the daughter of Ōkubo tadanao , known as osuma no kata . his childhood name was nagatomi-maru . he underwent the `` genpuku '' coming-of-age ceremony in 1725 . his first wife , nami-no-miya , was the daughter of prince fushimi-no-miya kuninaga -lrb- 伏見宮 邦永親王 -rrb- . his second wife , okō , was the daughter of one of the courtiers who had followed his high-born first wife from the imperial court to the shogunal court in edo . this famously good-natured second wife was the mother of ieharu , who would become ieshige 's heir . in `` enkyō '' 2 , ieshige was made shogun . ieshige suffered from chronic ill health and a severe speech defect . yoshimune 's choice of ieshige as his heir created considerable controversy within the shogunate as his younger brothers tokugawa munetake and tokugawa munetada appeared to be far more suitable candidates . yoshimune continued to insist on his decision , favoring the confucian principle of primogeniture ; and ieshige continued in the role of formal head of the shogunate . yoshimune directed affairs after his official retirement in 1745 . this attention was designed to ensure that ieshige was secure in his office . ieshige remained shogun until 1760 . uninterested in government affairs , ieshige left all decisions in the hands of his chamberlain , Ōoka tadamitsu -lrb- 1709 -- 1760 -rrb- . he officially retired in 1760 and assumed the title of '' Ōgosho , '' appointed his first son tokugawa ieharu as the 10th shogun , and died the following year . ieshige 's second son tokugawa shigeyoshi became the founder of the shimizu tokugawa clan , which together with the tayasu and hitotsubashi -lrb- established by ieshige 's younger brothers -rrb- became the `` gosankyō '' , three cadet branches of the tokugawa family from which future shoguns might be selected if the main line were to die out . they joined...
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