The research by business historians in Japan in the years from 2006〜2010 is explained as follows. Firstly, business historians' interest has been increasingly stronger on small and medium enterprises in regions over the world. They have the viewpoint of the positive role of those firms as engines which promote integration of the global economy. Secondly, business historians have developed an international perspective broader than before for understanding Japanese business. This perspective has broadened the scope of research interest from international comparison of Japanese businesses to their international relationships and multinational operations. Thirdly, the recent Lectures on Japanese Business History makes a big step to compose a through history of Japanese business. It uses business systems as a yardstick to divide the years from 1600 to the present. Fourthly, in order to understand the complex activities of global firms it is proceeding with research collaborations with empirical researchers in the fields of management and of economics.