Yonjigen Diver (四次元Diver) (ヨンジゲンダイバー) forms.
Yonjigen Diver (四次元Diver) pauses activities
Yonjigen Diver (四次元Diver) restarts activities.
Yonjigen Diver (四次元Diver) changes its name to Ultimate Unknown (アルティメットアンノウン).
Ultimate Unknown was a visual kei band. They were active around 2012.