S1·E22 The Shogun's Secret

Atsu-hime remains unsure whether Iesada is really benighted. The U.S. begins preparing for a trade treaty between the shogunate after signing the Treaty of Shimoda, a treaty of peace and amity. Although the shogunate is pressured to decide the next shogun to face the international pressure, Abe, the chief retainer of the shogunate who stands by Atsu-hime, suddenly passes away. Overwhelmed by the situation, Atsu-hime decides to confess to Iesada that the true intention of her marriage was to make Yoshinobu the next shogun. Iesada in return confesses his secret.