The Behind-the-Scenes Dealings of Souun Ebisugawa
S1:E10
2013
IMDb
The meaning of Kaisei's mysterious apology becomes clear as the Ebisugawa plot to boil Yaichirou in a hot pot is revealed on the day of the Nise-emon election. The day is also the anniversary of Soichirou's death, for which it turns out Souun was responsible.