Korekyojinn's 6th studio album 'Mesopotamia' is an instrumental progressive jazz-rock album featuring high tempo guitar-driven riffs, abrupt but consistent changes, and lots of rhythmic play. The album showcases the band's adeptness in playing with simple musical phrases and toying around with them in a multitude of ways. The rhythm section does a great job of keeping things feeling spontaneous but consistent. The album also features heavier, more dissonant sounds that fit well with their high tempo style. Overall, 'Mesopotamia' is a unique and enjoyable album for fans of instrumental progressive jazz-rock music.