Rock group founded as Jukka Kuoppamäki's backing band in the early 1970s. The band also worked as a backing band for nearly all artists who recorded for Satsanga Records, a record label owned by Kuoppamäki. Castanja consisted of Kari Hillo (guitar), Tapio Leppä (organ), Matti Juva (bass) and Pentti Burman (drums)