 For a time, before Iemitsu had conceived an heir, Mitsutaka was considered a potential candidate to be adopted by Iemitsu to inherit the office of "shōgun".In 1645, at a tea ceremony hosted by the "rōjū", Sakai Tadakatsu, he suddenly fell over dead at the age of 29.His grave is at the Nodayama Cemetery in Kanazawa.