Shinsengumi: The Shogun's last Samurai Corps is the true story of the notorious samurai corps formed in 1863 to arrest or kill the enemies of the Tokugawa Shogun.

The only book in English about the Shinsengumi, it focuses on the corps' two charismatic leaders, Kondo Isami and Hijikata Toshizo, both impeccable swordsmen. It is a history–in–brief of the final years of the Bakufu, which collapsed in 1867 with the restoration of Imperial rule. In writing Shinsengumi, Hillsborough referred mostly to Japanese–language primary sources, including letters, memoirs, journals, interviews, and eyewitness accounts, as well as definitive biographies and histories of the era.

The fall of the shogun's government (Tokugawa Bakufu, or simply Bakufu) in 1868, which had ruled Japan for over two and a half centuries, was the greatest event in modern Japanese history.

The revolution, known as the Meiji Restoration, began with the violent reaction of samurai to the Bakufu's decision in 1854 to open the theretofore isolated country to "Western barbarians." Though opening the country was unavoidable, it was seen as a sign of weakness by the samurai who clamored to "expel the barbarians."

Those samurai plotted to overthrow the shogun and restore the holy emperor to his ancient seat of power.