Lady Ninja Kasumi 4: Birth of a Ninja (2007)
Original title: 真田くノ一忍法伝 かすみ 誕生！猿飛佐助
Lady Ninja Kasumi 4: Birth of a Ninja is a 2007 Japanese-language action movie directed by Hiroyuki Kawasaki, with a running time of 1h 15m. It stars Akiho Yoshizawa, Mankichi Maeda and Abo.
Once again, Lady Ninja Kasumi is a candidate for a dangerous mission that will use all of her abilities as both a kunoichi and a woman. Her clan elder approaches a specific former member of their group, Sakichi, for his aid in the matter. Unfortunately, due to a tragedy and a lost love, he is unwilling to lend his help to the Sanada ninja, and Kasumi volunteers to handle the matter. Ultimately, she is captured and it is up to Sakichi to help her get to safety... but not before she settles the score with a rival lady ninja.