A.R.C.

A.R.C., allegedly short for オールアラウンドクラシック (ALL AROUND CLASSIC) was a hip-hop group formed in Gifu Prefecture. Within this group were the bands A CAPRICCIO, in which Crystal Boy formerly participated, NOIZE, in which HIDDEN FISH and QRBO formerly participated, and BLAZE, in which CHISA formerly participated.

Mysteries
What is the proper name of A.R.C.? The listed source credits them as ALL AROUND CLASSIC, but the documentation for EZION credits them as "all round Classics".