Reverse Along the lower edge arc, the mint year 1977 in Japanese: «昭和五十二年». In the central part of the reverse, a relief design of a large numeral 1.
Obverse Around the edge of the coin is a decorative raised pattern forming a closed linear rim. Along the upper edge arc, the country name Japan in Japanese: «日本國». Below, the inscription «一円», meaning 'one yen'. In the central part, an image of a cherry blossom branch with leaves, symbolizing the country's economic growth.