Samurai Justice: Assistance in a Duel (2004)
Samurai Justice: The Female Bodyguard

Overview
A chance encounter on the road leads to the unusual need for a female bodyguard to protect the granddaughter of an old friend of Akiyama Kohei, a wealthy merchant who plans to bypass his son-in-law as head of the company. When Daijiro’s wife Mifuyu takes on the job strange things start to happen, including the brutal slaughter of company employees. With the backing of Lord Tanuma, a chief elder on the ruling council, Kohei, Daijiro, and Mifuyu form a plan to foil the kidnappers plot and save the girl from certain death.
Similar
Seven Samurai (1954)
Zatoichi (2003)
Mission: Iron Castle (1970)
A Tale of Samurai Cooking (2013)
The Floating Castle (2012)
New Shadow Warriors (2003)
Shadow Warriors: Hattori Hanzo (1980)
Sure Death (1984)
Hirate Miki the Swordman (1954)
Kenkaku Shōbai: Tsujigiri (1982)
Kenkaku Shōbai: Kadowakashi (1983)
53 Stages of Action (1963)
Rashomon (1950)
Seventeen Ninja (1963)
The Hidden Fortress (1958)
A Naive History of the Bakumatsu Era (1991)
The Man Who Assassinated Ryoma (1987)
The Notorious Bored Samurai (1988)
The Notorious Bored Samurai 2 (1988)
The Notorious Bored Samurai 3 (1989)