Pair of participation medals issued for the Tokyo 1964 Summer Olympics. The first, copper, 61 mm, 118 gm, by Taro Okamoto/Kazumitsu Tanaka, with front featuring a stylized design of three runners and a swimmer placed on an olive branch, and the reverse bearing the Olympic rings and raised Japanese and English text, "XVIII Olympiad, Tokyo 1964." The second, silvered, 38 mm, 36 gm, features front and reverse designs identical to the larger version; this smaller participation medal was awarded to flag raisers. Both include their original wooden boxes.