Part 4/7:

Sony's success with transistor radios was just the beginning. In the 1960s, Masaru poured his heart and soul into developing a new color TV technology called Trinitron, which produced a brighter and sharper image than any other on the market. Over the next few decades, Sony became the world's largest TV manufacturer, selling around 290 million Trinitrons.

But Sony's ambitions didn't stop there. In the mid-1970s, they introduced the Betamax video cassette recorder, which allowed people to record and replay TV shows. Although Betamax had superior image quality, it ultimately lost the format war to the cheaper and more versatile VHS.

Undeterred, Sony made another bold move in 1979 with the introduction of the Walkman, a portable music player that allowed people to listen to music on the go. The Walkman became a massive hit, selling around 385 million units.

[...]