Ace of Diamond(ダイヤのADaiya no A, also known as Diamond's Ace) is a shōnen baseball manga written and illustrated by Yūji Terajima and published by Kodansha. It has been serialized by Weekly Shōnen Magazine since 2006. In 2008, Ace of Diamond received the Shogakukan Manga Awards for the shōnen category. In 2010, it won the Kodansha Manga Award for best shōnen manga. Teamed up with an elite catcher, pitcher Sawamura Sakai leaves his high school in the country to attend the catcher's high school.