Yaiba: Ninja Gaiden Z will release on March 4, 2014. Tecmo Koei announced the date for the cel-shaded spinoff's arrival on PC, PS3, and Xbox 360 in a release earlier this week.
The Team Ninja/Comcept/Spark Unlimited production has a new trailer, too. Be forewarned that the zombies Yaiba tears through appear to be significantly better people--mindless, rotting cannibals that they are--than Yaiba himself.
If you can stand Yaiba's company long enough, you may get to take down Ryu Hayabusa together--or Ryu might just chop Yaiba in half again. Either way it's a win-win.