Tadatoshi Akiba is a Japanese mathematician and politician and served as the mayor of the city of Hiroshima, Japan from 1999 to 2011.

The International Peace Bureau, founded in 1891, is one of the world's oldest international peace federations. The organisation was awarded the Nobel Peace Prize in 1910 for acting "as a link between the peace societies of the various countries". In 1913, Henri La Fontaine was also awarded the Prize "[For his work as] head of the International Peace Bureau". As of 2012, eleven other Nobel Peace Prize laureates have been members of the IPB.