Japan's Nikkei Stock Average retreated from yesterday's loss and climbed on Thursday lifted by data which showed unexpected trade surplus in February. Nikkei 225 index gained 0.4% or 40.59 points and finished at 10,127.08. Nevertheless gains were limited as better trade surplus strengthened Yen, harming exporter shares. The main gainers were Oki Electric and Softbank which added 3.9% and 3.4% respectively. Nomura Holdings fell 1.3% after company's name appeared in connection with insider trading case.