TTK first trademarked
the name Sony (for a transistor radio
) in 1955 and made the official corporation-wide switch
to Sony Corporation
in 1958. The name comes from Soni-tape
, a product the electronics company had been making since 1950. Akio Morita
switched the last letter to 'y' for the company name because he felt that the English phrase 'sonny boy
' conveyed a "youthful energy and irreverence
he wanted at the heart of the company."1
The connection is more obvious when the phrase is spoken by Japanese
tongues, as the "o" is spoken as a short vowel
I doubt the company would have been near as internationally successful with the name Tokyo Tsushin Kogyo.
1. Nathan, John. Sony: The Private Life.