Sony suffered in the final quarter by a stock market that knocked almost 50 per cent off the yen 's . Sony has for some time relied on profits from its banking and insurance business in Japan . The Japanese electronics and entertainment group said net profit for the year that ended in March totalled Y43bn ( $ 435m ) , a turnround from its massive Y457bn loss a year earlier . The company has struggled to compete against South Korean and Taiwanese producers .
Sony suffered in the final quarter by a stock market that knocked almost 50 per cent off the yen 's . Sony has for some time relied on profits from its banking and insurance business in Japan . The company has struggled to compete against South Korean and Taiwanese producers .