Session band NUMBER MOUSE (ナンバーマウス) forms.
V: Yshi / G: HIDETO / G: KURUTO / B: tuitui / D: KAZUKI
NUMBER MOUSE (ナンバーマウス) changes its name to number mouse and officially begins activity.
Yshi quits vocals and acts as support drummer. KURUTO moves to bass. Karuna joins on vocals and Keiji joins on guitar.
V: Karuna / G: Keiji / B: KURUTO / Support D: Yshi
V: Karuna / G: Keiji / B: KURUTO / Support D: YOU-YA
Vocalist Karuna (霞月) secedes.
Vocalist Kyohei (響兵) joins. COROKKE joins as performer and chorus. GAKE joins as support guitarist.
V: Kyohei / G: Keiji / B: KURUTO / C: COROKKE / Support G: GAKE / Support D: YOU-YA
Drummer YOU-YA joins.
V: Kyohei / G: Keiji / B: KURUTO / C: COROKKE / D: YOU-YA / Support G: GAKE
Guitarist Keiji (京司) secedes. GAKE becomes official member.
V: Kyohei / G: GAKE / B: KURUTO / C: COROKKE / D: YOU-YA
number mouse transition into being a non-visual band.
COROKKE secedes.
V: Kyohei / G: GAKE / B: KURUTO / D: YOU-YA
Drummer YOU-YA secedes.
V: Kyohei / G: GAKE / B: KURUTO
number mouse paused activities
number mouse was a formerly vkei band. They were active from 2004 to 2017 and are currently paused.