Approximately the complete works of Yellow Magic Orchestra, who started as three classically-trained musicians messing with these new "synthesizer" things in the 1970s, wanted to make music that combined Western pop with older Japanese music and proceeded to invent large slabs of synthpop and what became J-pop. They're the band Ryuchi Sakamoto came from. The studio stuff sounds slightly dated but is still pretty good, and musically important; the live stuff still sounds fresh IMO.