Shinto Muso-Ryu is a classical Japanese maritial art discipline or Koryu founded in the Tokagawa era about 1640. It takes it's name from an approximately 4 foot oak staff or Jo, which is shorter than the traditional Japanese staff or Bo, and is the central weapon used in the discipline.

An excellent introduction to Shinto Muso-Ryu and other classical Japanese martial disciplines is contained in Diane Skoss's excellent series published by Koryu Books. Sword and Spirit, Volume 2 covers Shinto Muso-Ryu.