Maeda family was 2nd most powerful clan in Japan, next to Tokugawa (Shogun's family) and their relatives, Matsudaira. Through marriage, over since 1,600 Maeda and Tokugawa families had intermarried. In 1864 faction in Japan conspired to overthrow the shogun government by capturing the emporer. As part of this, these factions attacked the emperors palace in Kyoto. The Nariyasu, the Maeda Lord sent his younger brother Yoshiyasu with an army to help in the defense of Kyoto. Yoshiyasu conspired with these rebel factions (Choshu and Satsuma clans), by withdrawing his troops. However the rebel factions failed in their attempt. This incident is known as "Kinmonnohen". Yoshiyasu was left in a precarious position as he was related to the shogun, but conspired with the rebels. Or ancestor, Daini Matsudaira who also was related to the shogun family took the blame and committed seppuku and save Yoshiyasu's life. My father said that this also prevented a battle between Maeda clan and the shogunate.