(1) Honshu Island is the largest island in Japan, and the capital Tokyo is located on this island.

(2) According to the schematic diagram, Japan faces the Pacific Ocean in the east;

(3) Japan is poor in domestic resources, and many raw materials and fuels depend on the import and export of manufactured goods, forming an economic feature dominated by processing trade; Japan's industry is mainly concentrated in the narrow strip along the Pacific coast and the inland sea coast of Seto.

Mount Fuji in Japan is an active volcano and a famous tourist attraction in the country.

So the answer is: (1) this state; b； Tokyo; (2) Pacific Ocean; (3) processing; Pacific Ocean; Mount Fuji.