Outside of these organizations, Mohrhardt was also heavily involved with scientific information exchange and library education in Asia. In 1957 he was a delegate to a meeting on International Exchange of publications in the Indo-Pacific area in Tokyo, Japan; which led to him helping develop the librarian training program for Japan's National Diet Library. In 1961 he was the U.S. delegate to the Pacific Science Congress in Hawaii, and he assisted with beginning cooperative projects there with Japanese scientists. He worked extensively in cooperation with the National Diet Library and led multiple scientific and library-related activities in Japan. His contribution would be acknowledged in 1979, when we was awarded the Merit Third Class of the Order of the Rising Sun. With his work with Japan, and other international organizations, particularly the International Federation of Library Associations, he demonstrated his reputation as an international diplomat. This can be characterized by one incident that occurred during a board meeting when an Eastern-bloc representative became distraught at the course of dialogue. Mohrhardt reportedly left the room and returned with a flower for the woman and was able to defuse the tense situation with his charm.
