First off would like to thank Metaghost for getting me into these guys years ago. There are really only a couple things you need to realize about Natsumen. They describe themselves as a "Japanese Progressive HardCore JAZZ Aggressive Improvisation ROCK band" and really I'd be hard pressed to argue with such a tagging. This stuff is gold with noisy abrasive guitars, intricate drumming and soaring horns. Maybe think Broken Social Scene with some balls minus vocals. Awesome Sauce