This is a tool-assisted speedrun. For more information, see http://tasvideos.org/3949M.html. TAS originally published on 2019-04-21.
Shinobi III: Return of the Ninja Master is a high class platformer with amazing graphics and sound. You control the ninja Musashi, who in this update has many new moves and abilities. He begins the game armed with 0 shurikens, but apparently someone felt the need to leave some conveniently in his way to use.
This run is a 36.83 second improvement to the predecessor movie (http://tasvideos.org/1308M.html) and it features lots of entertaining tricks and time-saving glitches. See the authors' notes (http://tasvideos.org/6359S.html) for a detailed overview.