Logic System is a musical project of Hideki Matsutake. Hideki started as an assistant for Isao Tomita in the 70s and is well-known as the sequencer programmer and modular synthesizer operator for the Yellow Magic Orchestra (YMO), but he wasn't a member of YMO. He worked on several of their albums and toured with his huge collection of synths. He also did sequencing work for numerous technopop albums for other artists, particularly in the early 80s. In 1996 he performed in a big concert event organized by Isao Tomita and was also guest on Towa Tei albums. On his website is a huge number of MIDI files he released, with some of YMO's original songs.