Masaru Ibuka

Masaru Ibuka co-founded Tokyo Tsushin Kogyo K.K. (Tokyo Telecommunications Engineering Corporation) with Akio Morita on May 7, 1946, in the devastated postwar landscape of Tokyo. The company was renamed Sony Corporation in 1958, adopting the name Ibuka and Morita had created for their brand of transistor radios.

Ibuka led the development of the Type-G tape recorder in 1950, which was the first magnetic tape recorder manufactured in Japan. He and his team also had to independently develop the magnetic recording tape itself, since no domestic supplier existed in Japan at the time, initially using paper-backed tape coated with hand-mixed magnetic material.

Sony's first transistor radio was the TR-55, released in 1955, which was also Japan's first commercially produced transistor radio. Ibuka pushed the company to license transistor technology from Western Electric's Bell Labs, overcoming significant engineering challenges to manufacture working transistors in postwar Japan.

Ibuka famously established a founding prospectus for the company declaring its purpose to be the creation of unique, technically excellent products rather than imitations of existing goods. This philosophy drove Sony toward ambitious engineering projects like the portable transistor radio and later the Trinitron color television, establishing Sony's reputation for technological innovation throughout the second half of the 20th century.