Kunoichi (くノ一) is the term for a female ninja or practitioner of ninpo.

According to wikipedia. Will it be another martial arts title like Revenge of the Wounded Dragons or a full-sized AAA title? Recently trademarked by Sony Computer Entertainment Inc.

From the ESRB rating:

This is an action game in which players defeat ninjas that spring up from under mats by throwing hammers at them. The gameplay is similar to traditional "whack-a-mole" mechanics, as players are rewarded as much for their quick reflexes as their hammer-throwing prowess. When ninjas are hit, they will grunt loudly as a bright burst appears at the point of impact.