Asia stocks weak, but Australia shares gain By: MarketWatch September 25, 2011 at 21:14 PM EDT Japanese shares fall as investors return from a long weekend but Australian shares gain on Monday. Read More >> Related Stocks: Bhp Billiton Ltd ADR Commonwealth Bk of A Daiwa Securities Group Inc Eneos Holdings Inc Jfe Holdings Inc National Australia Bank Ltd [Victoria Australia Nomura Holdings Inc Samsung Electronics Ltd Sharp Corp Sony Corp