Shōnen Ninja Kaze no Fujimaru, also known as Samurai Kid, is a Japanese anime series produced by Toei Animation. 65 episodes aired from 7 June 1964 until 31 August 1965. It tells the story of a ninja's pupil that controlled the wind.

It was inspired by the manga 'Kaze no Ishimaru' by Sanpei Shirato and was animated by Yasuji Mori and Hayao Miyazaki. The anime was renamed "Kaze no Fujimaru" in order to associate it with its sponsor, Fujisawa Pharmaceuticals.

The opening theme, 'Shōnen Ninja Kaze no Fujimaru' and the closing theme, 'Tatakau Shōnen Ninja', were both performed by the Nishirokugo Boy's Choir. The series originally ended with a repeat of the opening; the separate ending song came later.

战国时代，被风魔十法齐所率领的风魔一族养育长大的少年藤丸无意中卷入了记载着秘密武器的制作方法的《炎龙之书》的争夺之中，为了阻止十法齐，他必须要和使用可怕秘术的忍者们战斗。