Saitō Hajime (斎藤 一, February 18, 1844 – September 28, 1915) was a Japanese samurai of the late Edo period, who most famously served as the captain of the third unit of the Shinsengumi. He was one of the few core members who survived the numerous wars of the Bakumatsu period.
Saito was born in Edo, Musashi Province (now Tokyo). Very little is known about his early life. He was born Yamaguchi Hajime (山口 一) to Yamaguchi Yūsuke (山口 祐助), an ashigaru of the Akashi Domain, who had bought the rank of gokenin (a low-ranking retainer directly serving the Tokugawa shogun). He had an older brother named Hiroaki and an older sister named Katsu. According to the published records of his family, Saitō left Edo in 1862, after accidentally killing a hatamoto. He went to Kyoto and taught in the dōjō of a man named Yoshida, who had relied on Saitō's father Yūsuke in the past.His style of swordsmanship is not clear. According to a tradition of His descendants, His style comes from Ittō-ryū. His style is considered to be Mugai Ryū that originates from Yamaguchi Ittō-ryū. He is also considered to have learned Tsuda Ichi-den-ryū and Sekiguchi-ryū.
Saitō Hajime (斎藤 一), known as Hajime Saito in the English-language anime dubs, is a fictional character from the Rurouni Kenshin manga and anime series created by Nobuhiro Watsuki. Being a fan of the Shinsengumi, Watsuki created Saitō as an anti-heroic foil to Himura Kenshin, the main character of the story, while basing him on the real life Shinsengumi member of the same name.
Set during a fictional version of Japan in the Meiji period, Saitō, known as the "Mibu no Okami" (壬生の狼?, lit. "Wolf of Mibu") , is the former third squad captain of the Shinsengumi, a pro-shogunate force. During the Bakumatsu, he had a long time rivalry with Himura Kenshin, an assassin of the Imperialist cause. In the series, he is initially introduced as an antagonist who encounters and once again duels with Kenshin. It is later revealed that Saitō, who had only been testing Kenshin's strength, is now a spy agent working for the Meiji Government. After the reveal, Saitō becomes one of the main protagonists of the series, forming an uneasy alliance with Kenshin.