The 73rd Lake Biwa Mainichi Marathon will be held in Otsu City, Shiga on Sunday, March 4, 2018. Having been held every year since 1946, the marathon race boasts of history and tradition with many good matches. The 73rd race is attracting much attention also because it doubles as a qualifying meet to select athletes who will represent Japan for the 2020 Tokyo Olympic Games. Meanwhile, Lake Biwa Mainichi Marathon has the theme of "environmental conservation," and a campaign for environmental conservation activities is also developed through the event. Sympathizing with the idea and commitment, Sumitomo Electric has served as the main sponsor of Lake Biwa Mainichi Marathon since 2013. We will continue to contribute to the development of local communities by supporting marathon races and other sports events.