Eight men from the Shieikan dojo, including Isami Kondo, Toshizo Hijikata, and Soji Okita, joined the ronin unit tasked with protecting the shogun.
It later emerged that one member, Hachiro Kiyokawa, opposed the shogunate and supported the imperial cause, believing the emperor should stand at the top of national authority.
After talks with the officials in charge, the group was ordered back to Edo, but Kondo and Hijikata, along with Kamo Serizawa and others, insisted on staying in Kyoto.
The men who remained were named the “Mibu Roshigumi.”
They used the Yagi residence and the Maekawa residence in Mibu Village as their base, recruited members, and grew to a force of over 36.
As their numbers increased, they came under the protection of Katamori Matsudaira, lord of the Aizu Domain and Kyoto Shugoshoku (Kyoto Protector), and were tasked with patrols and cracking down on rogue ronin.
In recognition of these efforts, the Mibu Roshigumi was renamed the Shinsengumi.