- Name: Mitsuaki Ishitani (石谷光章)
- Birthplace: Hiroshima, Japan
- Birthday: August 4th
- Twitter: https://twitter.com/mitsu_akuma
Mitsuaki Ishitani is an artist affiliated to EXIT TUNES, who is known in BEMANI for his lyrics for Prim songs, as well as for other assorted songs involving Toshiyuki Kakuta or other EXIT TUNES artists.
He has effected a handful of songs in the SOUND VOLTEX series as well, effecting EXIT TUNES or Yuuhei Satellite songs (he is a member of the latter circle under the HiZuMi alias.)
- His Acid-Stone Valley alias originates from the kanjis for Mitsuaki's last name, 石 (ishi, stone) and 谷 (tani, valley).
- 幽閉サテライト (former member, as HiZuMi)
- Acid-Stone Valley
- MaMiKa (member of)
- 純情ディスコード (member of)