The Tokyo Stock Exchange has decided to extend its trading hours from May 9 as part of a plan to boost volumes and fend off growing competition from exchanges in Asia, a spokesman said on Saturday. Japan's main bourse had been looking to shorten the 90-minute midday break by ending morning trade at 11:30 am instead of 11 am, but had not fixed a date. Cash trading now starts at 9 am (0000 GMT) and ends at 3 pm with a lunch break between 11 am and 12:30 pm.