earlabs.org. "A concert series of Japanese contemporary music after WWII given at Kioi Hall in Tokyo. This issue includes unreleased and rare tape music. [...]
I found these recordings through my favourite p2p Soulseek. Soundquality is not very good (direct from an old vinyl) but it fills a gap in the history of electronic music.
Mayuzumi shows his interest in films here already, presenting many acoustic scenes. He later scored a lot of movies before dying in 1997. The Moroi - Mayuzumi collaboration is purely electronic. Takemitsu's Vocalism AI is a haunting tape piece which really catches your attention. The others are a bit less expressive. Hashegawa's piece is actually a sort of radioplay which really MUST have been a big inspiration for John Zorn's 'Spillane'. "