- Name: Yusuke Ishiwata
- Birthday: July 6th (source)
- Twitter: https://twitter.com/com_giko_31
- SoundCloud: https://soundcloud.com/xi_com_giko_31
- YouTube: https://www.youtube.com/c/xiOfficial
Yusuke Ishiwata is a Japanese music producer known for his Be-Music Source Files (BMS) and for his appearances in Rayark Games' rhythm series Cytus, which made him quite popular. Yusuke Ishiwata almost always writes piano and artcore songs, however he's recently producing under various electronic genres.
He was a member of the 100sec Records label until March 31st, 2014 and currently is a member of the Diverse System label.
- xi is pronounced "sai", which is derived from the word "Saikoro" (サイコロ), Japanese for "Dice".
- xi's name might be a reference to 1998 PlayStation video game XI [sái], also known in the west as Devil Dice.
- Yusuke's avatar depicts a die.
- Until TU-MA-MI△ALL-NIGHTER (which had a Level 14 EXHAUST chart), all of Yusuke's songs in the SOUND VOLTEX series had EXHAUST charts rated Level 15.
- SOLID STATE SQUAD is Yusuke's favorite beatmania IIDX song, as noted on the BEMANI ULTIMATE REMIXes album site.
- He also remixed the song for the above album, under the title SOLID STATE SQUAD -RISEN RELIC REMIX-.