Japan and the United States are arranging for U.S. Secretary of State Marco Rubio to make his first visit to Japan early next month, a Japanese government source said Friday, with U.S.-imposed tariffs and the Middle East situation expected to be key topics.The trip is being arranged as part of Rubio's travel to Asia to attend a series of foreign ministerial meetings related to the Association of Southeast Asian Nations in Malaysia from July 8 to 11, according to the source. He also plans to visit South Korea.If the Japan visit is finalized, Rubio, who was sworn in in January as the top U.S.…READ FULL ARTICLE