1:4 forms in Osaka (大阪)大阪.
V. Hirofumi / G. Yoshitsugu / B. Luna / D. Hibari
Drummer Hibari leaves, and isn't immediately replaced.
V. Hirofumi / G. Yoshitsugu / B. Luna
Drummer Atsuhito joins.
V. Hirofumi / G. Yoshitsugu / B. Luna / D. Atsuhito
Vocalist Hirofumi leaves following a live at the Akasaka (赤坂) BLITZ venue. Eins:Vier then go on a slight hiatus.
Vocalist YAMASAKI joins Eins:Vier, bringing the group back from their hiatus.
V. YAMASAKI / G. Yoshitsugu / B. Luna / D. Atsuhito
Eins:Vier officially disbands
It is announced that Eins:Vier is reuniting, although without drummer Atsuhito.
V. Hirofumi / G. Yoshitsugu / B. Luna
Eins:Vier play their first live in 12 years at V-ROCK FESTIVAL 2011.
Eins:Vier play one more acoustic live and disband once more
Eins:Vier announce its third revival.
Eins:Vier play their first live in four years at the Meguro (目黒) ROCKMAYKAN (鹿鳴館) venue, which sells out a month in advance.
Risk from Inside 1994 tour begins
Tour ends
Eins:Vier is an active visual kei band in Osaka. They are part of the soft visual subgenre. They have been active since 1990.