Unknown copyband forms in Tokyo (東京)東京.
G. T∀KA / B. Yoshinori (好紀) / D. KOHEY / (?)
The copy band becomes an official band and changes their name to ∑ sigma (シグマ).
Vocalist KENGO joins.
V. KENGO / G. T∀KA / B. Yoshinori (好紀) / D. KOHEY
At some point during the year, bassist Yoshinori (好紀) switches to guitar and new bassist Mari (真里) joins.
V. KENGO / G. T∀KA / G. Yoshinori (好紀) / B. Mari (真里) / D. KOHEY
∑ sigma disbands
∑ sigma was a visual kei band in Tokyo. They were active from 1999 to 2001 and are now disbanded.