Doing business outside your home country can be challenging in many or most foreign markets. It is probably fair to say, however, that doing business in Japan is signficantly more challenging than in markets geographically and culturally closer to home.
Under you can find an overview of Japanese business organisations with contact details.
Japanese Business Organizations
Japan External Trade Organization (JETRO)
Japan Institute of Labour
Manufactured Imports Promotion Organization (MIPRO)
Osaka Chamber of Commerce and Industry
Japan Chamber of Commerce and Industry
Tokyo Chamber of Commerce and Industry