Bloomberg, (9/4) -- Japanese shares advance, with the Topix Index posting its biggest five-day gain since March 2011, after the yen fell to its lowest level in four years. Toyota Motor Corp., the world’s largest carmaker, rose 1.1 percent. Okuma Corp., a machine tools maker, jumped 7.5 percent after Credit Suisse AG raised its investment rating on the company. Mitsubishi Materials Corp., Japan’s third-biggest copper producer, advanced 6.1 percent after the Nikkei newspaper reported pretax profit will increase 14 percent. The Topix index gained 0.7 percent to 1,109.60 as of 9:25 a.m. in Tokyo, with about four shares rising for every three that fell. The Nikkei 225 Stock Average rose 0.9 percent to 13,306.07. The Topix jumped 53 percent from mid-November through yesterday as Prime Minister Shinzo Abe and central bank Governor Haruhiko Kuroda pledged to defeat 15 years of deflation. The gauge is trading at 1.2 times book value, compared with 2.2 for the Standard & Poor’s 500 Index and 1.5 for the Stoxx Europe 600 Index, according to data compiled by Bloomberg.