Hitotsubashi Nobunobu is the leader of the Hitotsubashi faction.
He belongs to the Hitotsubashi faction, which opposed the Tokugawa faction that controlled the government until the assassination of the 14th shogun, Tokugawa Shige Shige.
When the Tendoshuu intervene to establish the Hitotsubashi faction as the new rulers of the government, Nobunobu becomes the 15th shogun.
(Source: Gintama Wiki)










