Refer to this video: Grain - Kuniaki Haishima (used in the opening to the Monster anime)
What is this genre of music called and where can i find more of this?
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You're better off looking into experimental composers/producers , I don't think there's an established genere specifically for this but there are a lot of japanese composers (that usually work in anime) that create similar types of music where there's chanting and upbeat rock or modern instrumentation . I can give some names that come to mind (but they may not sound exactly like this sorry) : Kalafina , Yoko Kanno , Susumu Hirasawa , Kenji Kawai