The Onechanbara series started off as one of D3Publisher’s budget PlayStation 2 titles and quickly evolved into a core series for the company. Onechanbara moved to Xbox 360, Wii, and PSP with the same characters and zombie slashing gameplay.
Onechanbara Z: Kagura has vampire sisters Kagura and Saaya as the leads and from the looks of it more types of monsters to kill. Same campy cowgirl bikini costume, though.
Did… the Onechanbara series get an upgrade? For comparison’s sake a video of Onechanbara: Bikini Zombie Slayers is below.
Onechanbara Z: Kagura is an Xbox 360 exclusive and apparently "coming soon" in Japan.