Marto Sho Kosugi Ninjato from Ninja III
Silly backstory first, close look at the sword starts at about 6:15.
A closer look at my old Spanish-made "Official Sho Kosugi" Ninjato that Marto released to go with "Ninja III: The Domination". Some bits original, lots of bits changed over time, but a phenomenally good "bad" sword featuring the classic Marto aluminum tube and plastic Saya, plastic Tsuka, die-cast fixtures, and a machine-cut and polished 440 stainless steel blade that's surprisingly tough.
A piece of Martial Arts pop culture history.