Zan
ZAN is a Jpop group that specializes in instruments.
They are under the label RhythmZone(part of Avex).
The group consisted of 3 members:
Sunagawa Norikazu,
Kominato Akihisa,
and Ichikawa Shin. The leader Sunagawa passed away on April 2006, ZAN is currently a 2 man group. official site