Sega X1/SX Like a Dragon: Ishin

Sakamoto Ryoma. Accused of murdering someone he holds dear, this lowly samurai from a backwater land renounces his name and goes into hiding.
To find the true killer's identity, Ryoma must conceal himself among the wolves of the infamous Shinsengumi.
Taking the alias Saito Hajime, it isn't long before he winds up embroiled in the political schemes and savage violence that will reshape the country—and give rise to legends.