Doi resigns his office, complaining that he is ill. Iemitsu assigns Matsudaira as Chief Chamberlain, Yagyu as Inspector General, and shuffles his cabinet to deal with his brother's potential attempt to seize the shogunate.
Doi abdicates his position due to health concerns, prompting Iemitsu to appoint Matsudaira as Chief Chamberlain, assign Yagyu as Inspector General, and reconfigure his cabinet in response to his brother's possible coup attempt.