Japan's Nikkei Stock Average traded in narrow range on Monday as investors remained cautious towards more positive news from Greece. Nikkei 225 index gained 0.15% or 12.76 points and finished at 8,593.15. MS&AD Insurance Group Holdings fell 1.5% on news Lloyd's expect euro collapse in case Greece exits the common currency area. Furukawa Co surged 3.1% after announcing it will construct device that will allow testing the radiation level of fish. Fast Retailing advanced 2.2%.