Extraordinary Hero Lion-Maru (快傑ライオン丸, Kaiketsu Raionmaru, lit.

The Extraordinary Lion Knight, also translated as The Vigilant Lion Knight and Swift Hero Lion Knight) was a Japanese tokusatsu television series in the Lion-Maru franchise that aired in 1972–1973, produced by P Productions and set during Japan's Sengoku period (the Age of Warring States).

During the late 16th century (September 1, 1567 to December 31, 1600), a trio of ninja orphans are wandering Japan and saving people from evil by battling a villain of the week in each episode, all of which are serving the devil known as Gousan.

The main character, Shishimaru, has been granted the ability to transform into a superpowered anthropomorphic white lion, usually wielding a katana.

In P Productions' publicity materials for the 2002 DVD release, Lion Maru was subtitled The Beast-Transformed Ninja Warrior.