Through his composition student, Makoto Shinohara, Stockhausen was invited by the Japan Broadcasting Corporation NHK to visit Tokyo, and to carry out two commissions in their electronic music studio, in connection with the 50th anniversary of the founding of NHK in 1965. Because of other commitments, Stockhausen was unable to meet this schedule but finally, under pressure from Tokyo, he flew to Japan on 19 January 1966. According to a note in the score,
