Source: connectedconsoles.com
Update 2: Sony have replied with a 'no comment'. We'll have to wait a little longer to find out what these titles mean.
Update 1: Kunoichi, means female ninja. So we could have a new Ninja PS3 Exclusive game on our hands, and it would also work well with the motion controller. Also, Nightshade was released exclusively for the PlayStation 2 back in 2003, and was known as Kunoichi in Japan.
Sony Computer Entertainment Inc. have filed trademarks for several registrations recently. One of them titled 'Legend of Kunoichi'.
Spotted by SuperAnnuation, the other trademarks include 'Digi-Tiles', 'Earthshield' and 'Smashbreak' - So could we be seeing Sony's very own Zelda in the making with 'Legend of Kunoichi'? It certainly would work with the PlayStation 3 motion controller. Only time will tell, so we've contacted Sony for comment, and will bring you any future updates.