Mikio Masuda

Japanese keyboardist Mikio Masuda with a legitimately smooth track, and quite possibly the best/worst album art I've seen in a while.
"Moon Stone" from the 1977 album of the same name:

Tomo Akikawabaya

Japanese mystery man Tomo Akikawabaya made his brief appearance in the mid 80's with several self-released singles, each featuring model Rena Anju on the cover, and promptly fell off the face of the Earth. there are no pictures of this man known to exist, he gave no interviews, never publicly performed, and he has (presumably) not released any more music since 1986. All instruments and noises played by Tomo Akikawabaya.
"Diamond" from the 1985 single:

Side B - "Dream of No Pillow":

Haruomi Hosono

One of the founding members of Yellow Magic Orchestra, part-time session bassist, and electronic producer, Haruomi Hosono also produced some of his own eclectic music, including the album Philharmony (1982), a collection of ambient, experimental, and pop electronic sounds.
"Living Dining Kitchen":

"Platonic":

"Luminescent/Hotaru"

YMO

the Yellow Magic Orchestra with "Technopolis," the opening track from their 1979 album, Solid State Survivors:

Noh Mask

Michael Silverstein was involved in a couple of moderately successful Belgian post-punkish bands (Digital Dance, The Names) in the late 70's and early 80's. In 1984, he joined up with singer Bernard Dradin in Japan and the two took a decidedly sharp turn into New Wave territory. They quietly released the EP Gaijin and quickly followed it up with the 12" Oriented LP under the name Noh Mask.
"Empire of the Signs" from Oriented:

"Twilight in Tokyo" from Oriented:

Non Band

"Duncan Dancin'" from their 1982 self-titled LP: