Japan's Nikkei tumbled 1.8 per cent on Friday, Australia's resources-heavy shares slid 1.5 per cent, while South Korea plunged 2.3 per centJapan's Nikkei tumbled 1.8 per cent on Friday, Australia's resources-heavy shares slid 1.5 per cent, while South Korea plunged 2.3 per cent Latest News [ SOBAN NEWS: International and National ]