Former Capcom R&D head and producer Keiji Inafune has been keeping himself busy. Not only is he working on Soul Sacrifice, Kaio: King of Pirates, and a side-scrolling Android game called JJ Rocket, but he has also announced a new game called Yaiba ("blade" or "fang" in English).
According to a recent issue of Famitsu (via SGCafe), all Inafune has said about the game is that the zombie action title will have ninja and mecha elements in it. The article on Famitsu also showed off numerous artworks of zombie hordes.
On a related note, Koei Tecmo registered the trademark "Yaiba" in Europe on August 31 this year, which could mean that the publisher of the Dynasty Warriors and Ninja Gaiden series might be involved with Inafune's new game.
No platforms have been announced for Yaiba. More details on the game will be revealed on September 20, which is the first business day of Tokyo Game Show 2012.