- Birth: 1835
- Death: 1893
- Titles: Higo no kami
- Childhood name: Keinosuke
- Other names: Masane Reishin (Shinto name)
- Japanese: 松平 容保 (Matsudaira Katamori)
While in Kyoto, he used the Shinsengumi to maintain public peace.
The Battle of Aizu
Katamori left Kyoto during the Battle of Toba-Fushimi with Shogun Yoshinobu and returned to Aizu in february. Pro-Emperor troops defeated the Bakufu troops in Ueno (the Battle of Ueno) and headed to north in May. The han in northern provinces allied together to against the Pro-Emperor troops which were mainly Satsuma han and Choshu han. However some of the han went over to the Pro-Emperor side and most han surrendered before Aizu fell.
After the Boshin War, Katamori confined himself until 1872 and became the chief priest of Nikkô Tôshô Gû in 1880. Katamori died of Pneumonia in 1893, he kept a letter from Emperor Komei with him all the time but he never talked about Bakumatsu.