The atypical song duo project of Junichiro Tanaka and sei
2008 - released the mini-album Taigun Yuei on black petal
2011 - released the full album Cone-Solo (produced by Taku Unami) on Enban
2014 - released U as in Utah, a 2-CD set in which ju sei collaborates with Utah Kawasaki, on Meenna/Ftarri
from 2015 - as "ju sei et filles" and "ju sei préférée," ju sei has also been holding concerts together with a number of female artists as guest members