Zun's Music Collection 4 Retrospective 53 minutes Touhou Music CD 

East-West Tokaido ~ Retrospective 53 minutes (卯酉東海道　～ Retrospective 53 minutes Bouyu Toukaidou^[1] ~ Retrospective 53 minutes^[2]) is an official doujin album by Team Shanghai Alice released on 2006-05-21 (Reitaisai 3). It is part of "ZUN's Music Collection", as the fourth volume (vol.4).