Japan (2004 - Present) デメトリ Demetori is an instrumental progressive metal duo from Japan consisting of twin brothers Masaru "Tokunan" Teramae and Tadashi "Kyuuhouji" Teramae. Their sound is generally fast and intense with displays of very high technical ability, although it can also get softer on occasion. They have released twelve full-length albums of rearranged tracks from the Touhou original soundtrack (including a collaboration album with UI-70) and a retro game music cover album.