In late 1945, after the end of World War II, Masaru Ibuka started a radio repair shop in a bomb-damaged department store building in Nihonbashi of Tokyo. The next year, he was joined by his colleague, Akio Morita, and they founded a company called Tokyo Tsushin Kogyo K.K.,(Tokyo Telecommunications Engineering Corporation). The company built Japan's first tape recorder, called the Type-G.

University of Arizona professor Michael Brian Schiffer, PhD, says, "Sony was not first, but its transistor radio was the most successful. The TR-63 of 1957 cracked open the U.S. market and launched the new industry of consumer microelectronics." By the mid 1950s, American teens had begun buying portable transistor radios in huge numbers, helping to propel the fledgling industry from an estimated 100,000 units in 1955 to 5,000,000 units by the end of 1968. Sony's headquarters moved to Minato, Tokyo from Shinagawa, Tokyo around the end of 2006.

The Sony Group is primarily focused on the Electronics (such as AV/IT products & components), Game (such as PlayStation), Entertainment (such as motion pictures and music), and Financial Services (such as insurance and banking) sectors. Not only do we represent a wide range of businesses, but we remain globally unique. Our aim is to fully leverage this uniqueness in aggressively carrying out our convergence strategy so that we can continue to emotionally touch and excite our customers.