Basilisk (Japanese: バジリスク〜甲賀忍法帖〜 Bajirisuku ~Kōga Ninpō Chō~, lit. Basilisk: The Kōga Ninja Scrolls) is a Japanese manga series written and illustrated by Masaki Segawa. It was published in Japan in 2003 and 2004 in Kodansha's Young Magazine Uppers magazine, based on the novel The Kouga Ninja Scrolls by Futaro Yamada published in 1958. The anime, produced in 2005 by Gonzo Studios, closely follows the manga aside from a handful of distinctions. The manga won the 2004 Kodansha Manga Award for general manga. Segawa continued producing serialized adaptations of Futaro Yamada's novels with The Yagyu Ninja Scrolls in 2005, Yama Fu-Tang in 2010, and Jū: Ninpō Makai Tensei in 2012. Additionally, a two-part novel sequel titled The Ōka Ninja Scrolls: Basilisk New Chapter (桜花忍法帖～バジリスク新章 Ōka Ninpō Chō ~ Bajirisuku Shinfumi), penned by Masaki Yamada, was published in 2010; a manga adaptation, Basilisk: The Ōka Ninja Scrolls (バジリスク〜桜花忍法帖〜 Bajirisuku Ōka Ninpō Chō~), illustrated by Tatsuya Shihira with character designs by Masaki Segawa, began serialization in 2017, and an anime adaptation by Seven Arcs Pictures is slated to premier in January, 2018.

The story takes place in the year 1614. Two ninja clans, Tsubagakure of the Iga and Manjidani of Kouga, battle each other to determine which grandson of Tokugawa Ieyasu will become the next shogun. The deadly competition between 10 elite ninja from each clan unleashes a centuries-old hatred that threatens to destroy all hope for peace between them.
...
https://www.youtube.com/watch?v=Eg-FHiZgk00