- Name: Youhei Kimura (木村洋平)
- Birthdate: November 29th, 1979
- Website: http://www.iosysos.com/
- Profile: https://www.iosysos.com/creator-arm.html
- Twitter: https://twitter.com/ARM_IOSYS
Youhei Kimura, better known as ARM, is one of the composers belonging to IOSYS, a Japanese musical ensemble and doujin circle from Sapporo, Japan, which is primarily known for producing remixes of music from the Touhou Project series of doujin games.
While most of Youhei's works can be categorized as denpa music, he is a multifacetic and versatile composer who can arrange a lot of styles, having dabbled in a huge amount of genres. His instrumental works also include Glitch Hop, Drum and Bass, Happy and UK Hardcore, Jazz, Classical Piano, Rock, Metal among others.
- Youhei has also contributed to BANDAI NAMCO's DEN-ON-BU media mix project and THE IDOLM@STER CINDERELLA GIRLS, SEGA's maimai series, and TAITO's GROOVE COASTER series.
- イオシスjkガールズ (composer for)
- ALBATROSICKS (composer for)
- fallen shepherd