Mitsui & Co., Ltd. is one of the largest sogo shosha in Japan; it is part of the Mitsui Group.

Sogo shosha are Japanese companies that trade in a wide range of products and materials. In addition to acting as intermediaries, sōgō shōsha also engage in logistics, plant development and other services, as well as international resource exploration. Unlike trading companies in other countries, which are generally specialized in certain types of products, sōgō shōsha have extremely diversified business lines, in which respect the business model is unique to Japan.