Written and first recorded by Yellow Magic Orchestra (1979).
Hit versions by Greg Phillinganes (R&B #77/DANCE #4 1985), Eric Clapton (UK #15 1987).
Also recorded by Michael Jackson (1982, released 2010), Ryuichi Sakamoto & Bernard Fowler (1987), The Human League & Yellow Magic Orchestra (1993).
From the wiki: “‘Behind the Mask’ is a Synth-Pop song by electronic band Yellow Magic Orchestra, written by member Ryuichi Sakamoto and first produced as an instrumental in 1978 for a Seiko watch commercial. It was later released in 1979 as part of the band’s Solid State Survivor album with English lyrics added by Chris Mosdell. Sakamoto already had the melody line when he asked poet and lyricist Mosdell to write lyrics, which Mosdell based on the imagery of a Japanese traditional Noh mask, combined with a poem by Irish poet W.B. Yeats called, ‘The Mask’.