Shammon is formed as Sham-on, shortly after the disbandment of WILD STYLE, which was the original group of Vo. 有待雅彦.
Vo. 有待雅彦, Dr. 大山正篤
Sham-on sign to NESC RECORDS, an indies sublabel of Nippon Columbia.
Sham-on change their name to Shammon, leave NESC RECORDS, and sign to Tokuma.
Shammon leave Tokuma and go on a slight hiatus.
Shammon resume activities as an indies band.
Shammon play their final live together at the Omotesando FAB, and suddenly disintegrate afterwards.