Japanese Rock...Prog or Not...

[TheH]

I think (partly based on the CD-booklet of Mongol's album in which the same aliases are being used) this is the line-up:

bass: Ultra-Pump (Mongol,Negasphere,KIAT) = Naoto Amazaki
drums: Stamper (Mongol,ex誘精) = Kiyoshi Pochi-Imai
keyboards: Zetton (那由他計画,AQANESUSS) = Ryo Okumoto
guitar: Driller (Mongol,Noa) = Hirofumi Mitoma

Zetton on Keys is Tsukada from Providence!

[interbellum]

Zetton on Keys is Tsukada from Providence!

You're correct of course, it's Tsukada Madoka.
I googled on Aqanesuss and on the page https://theprogressiveaspect.net/blo...uss-aqanesuss/ the first keyboarder I found was Okumoto, but I didn't read it properly.
I'll edit my post with the line-up.