Japanese Emperor Akihito (L) and Empress Michiko attend a ceremony of the 100th anniversary of Riken, the institute of Physical and Chemical Research, in Tokyo on April 26, 2017. RIKEN is Japan's largest comprehensive research institution renowned for high-quality research in a diverse range of scientific disciplines. Founded in 1917 as a private research foundation in Tokyo, RIKEN has grown rapidly in size and scope, today encompassing a network of world-class research centers and institutes across Japan. ( The Yomiuri Shimbun via AP Images )