Effective period / Period of releases: 2006

Per http://sxsw-asia.com/JapanNite2008/JN2008_sodopp.html
A three-piece all-girl band, sodopp was formed in 1999. After some member changes, it became the current band members (Satoko on guitar and vocals, Ayano on bass and chorus, and Seina on drums and chorus) in the Autumn of 2000.

Per http://www.ongaku-heiya.com/home/artist/sodopp/ the band went on hiatus 2010-08-14.
This same webpage lists a discography, most entries in which were issued as CDRs.