The first round of Onechanbara Z download content hits on the 24th. We shared details here.
D3 Publisher announced the second round today just as the game saw release. The second round will be released on the 31st and will include collaboration costumes from D3's own Dream Club host sim.
These are priced 320 MSP each.
The DLC also includes hair styles, bunny ears, "tear drop sunglasses," "skull face" and a cute little zombie stuffed animal that hugs you as you bash away at real zombies. These items range from 80 to 240 MSP.