Here is the information on Satistics and Trading.
Ministry of Economy, Trade and Industry/METI
Ministry of Health, Labour and Welfare
The Japan External Trade Organization (JETRO) is a government-related organization that works to promote mutual trade and investment between Japan and the rest of the world. Originally established in 1958 to promote Japanese exports abroad, JETRO's core focus in the 21st century has shifted toward promoting foreign direct investment into Japan and helping small to medium size Japanese firms maximize their global export potential.
e-Stat - Portal Site of Official Statistics of Japan
e-Stat is a portal site for Japanese Government Statistics.