A1:The company was established as Tokyo Tsushin Kogyo Corporation in May 1946. (The company name was changed to Sony Corporation in January 1958)
A2:This was done in August 1955.
A3:The stock was first listed on the Tokyo Stock Exchange in December 1958.
A4:A first from the Japanese industry, ADRs were issued in June 1961.
A5:The company was listed on the NYSE in September 1970.