I just discovered this genre in Rhapsody: Japanese Noise Rock. It's exactly the type of thing I love stumbling across from time to time. One of the bands, Zeni Geva is sweet. Rhapsody's description of them: "Uncompromising Japanese noisecore that's slow, yet utterly crushing". They're annoying as hell and I love it. Melt-Banana's Bambi's Dilemma album is decent too.
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