Sony shares tumbled below 1,000 yen for the first time since 1980 as the Tokyo stock market plunged Monday, June 4 following a dismal performance from Wall Street and amid global economic concerns, AFP reported.

The entertainment and electronics giant dropped 1.67 percent to close at 996 yen as the benchmark Nikkei index lost 1.71 percent on the Tokyo Stock Exchange on Monday.

Dealers said Sony last traded below the psychologically important 1,000 yen level in August 1980 around a year after its landmark "Walkman" portable music player was released.

The total market value of the company is now around one trillion yen ($13 billion), compared with 11 trillion yen in 2000, there year the PlayStation was released and shares hit a peak of 16,950 yen, dealers and news reports said.

Sony posted a record full-year loss of 456.66 billion yen ($5.8 billion) for the year to March 2012 as it struggled with losses in its television division.

Japanese companies have blamed tough competition from rivals including South Korea's Samsung, falling prices, slow demand, the impact of severe flooding in Thailand last year, and the high yen for their travails.