Killer is Dead is rated CERO Z a point that Kadokawa Games makes over and over again in this video. Games with a CERO Z rating are kind of like ESRB AO games in North America and have restrictions like actual copies of the game have to be behind counters.
The video also shows Mondo Zappa, the main character, with both of his arms. When you play the game, Mondo has a cybernetic left arm that charges up when he absorbs blood. The cybernetic arm is an interchangable subweapon with a Mega Buster-like Charge Cannon and a Drill.
Killer is Dead comes out next week in Japan. Xseed has the PlayStation 3 game slated for release on August 27.