The Bank of Japan has decided not to launch more stimulus after the country's economy grew more than expected in the first quarter. The central bank's annual 80 trillion yen monetary easing programme will remain in place. Governor Haruhiko Kuroda will give a briefing later in the day. Japan's economy expanded by 0.6% from the previous quarter and 2.4% between January-March. The BoJ said that Japan's economy has continued to recover moderately and pointed to declining public investment. The inflation rate in March came in at a tepid 0.2% from a year ago, well short of the BoJ's target.