cadenza (カデンツァ) forms in Sapporo (札幌)札幌.
Twoman is held with ArcAdiA.
A flyer from around this time shows a three-member vkei band with the lineup as follows (it was likely this way much earlier, though).
V. Kouki (孔稀) / B. Tatsuya (燵弥) / D. Shuu (愁)
A Sapporo (札幌) centered omnibus from this time features a band called cadenza with 4 members who appears to be non-visual. It's likely, but unconfirmed, that this is the same band who performed with ArcAdiA in 2002. So it would seem that they dropped their visuals and changed their lineup at some point.
Sometime before this, cadenza likely switches to a non-visual band and some unknown member change(s) occur.
cadenza was a visual kei band in Sapporo. They were active around 2002 and are now disbanded.