Paul du Gay’s Book, Doing Cultural Studies: The Story of the Sony Walkman
1978 — Akio Morita wanted to listen to classical music while traveling » Nobutoshi Kihara (aka Mr. Walkman) designed
1978 — Masaru Ibuka wanted to listen to opera during his frequent trans-Pacific plane flights » Kozo Ohsone designed
Kozo Ohsone gave Masaru Ibuka a version who then took it to Morita
1978 — Masaru Ibuka responsible » asked Norio Ohga » Nobutoshi Kihara designed
Article: “Ironically, once it became clear that Sony’s huge, powerful portable radios had become noisy blights, Akio Morita, Sony’s CEO, had the Walkman developed as an alternative. But the Walkman didn’t displace the boom box, selling like hotcakes instead to middle-class joggers. Morita had missed the cultural implications of the boom box, often used to attract attention or stake out territory.”
Official Sony Version
1978 — Masaru Ibuka (Honorary Chairman) » Norio Ohga (Executive Deputy President) » Kozo Ohsone (GM of Tape Recorder Business Division) » Masaru Ibuka then went to Akio Morita » Feb 1979 meeting to develop Walkman by June 21st. No mention of Nobutushi Kihara as the designer known as Mr. Walkman