This split CD has German written all over it. I don't know a whole lot about either Eisenvater or Japanische Kampfhörspiele. Both bands leave a somewhat mixed feeling. "Vater Kommt" is a preview from the upcoming Eisenvater IV CD. It's a little difficult to put a proper tag on Eisenvater as the band toy with many different genres. "Vater Kommt" is slow and moody. I wouldn't call it death metal or grindcore - it's more like something in the vein of sludge and punk. The music is good without becoming interesting. It has made me somewhat nosy, but not in a way that makes me want to check out the band more.
It's a little different with the three songs that Japanische Kampfhörspiele come up with. The band is a lot more brutal in their approach. "Töte Der Roboter" starts out with something that sounds like King Diamond, but the song quickly get a little more going. The Germans are definitely somewhat different in their style than most grindcore. The band uses quite a bit of electronic parts in the music and that's actually also what makes the music interesting. Japanische Kampfhörspiele really understands how to make their music vigorous and different. The band uses a variety of styles, but not in a way the makes it sound messy or unnatural.
Common for both bands is that they sing in German and that adds to the music, in a positive way.