Excel Saga is a manga series written and illustrated by Rikdo Koshi. It has been serialized in Young King OURs since 1995, and its individual chapters were collected and published in tankōbon volumes by Shōnen Gahosha. The series follows the attempts of Across, a “secret ideological organization,” to conquer the city of Fukuoka as a first step towards world domination. The title character of the series, Excel, is a key member of the group working towards this goal, while the city is defended by a shadowy government agency led by Dr. Kabapu.
Believing the World to be corrupt, the secret organization Across plans to conquer the world. The first step in the plan for world domination is to begin by focusing on one city in order to minimize setbacks. Across consists of the leader of the organization, Il Palazzo, and officers Excel and Hyatt. Excel and Hyatt live in an apartment building in the city, along with their pet dog Menchi, who is also their emergency food supply, and are later joined by Elgala, another Across officer. Living in the neighboring apartment are three guys: Iwata, Sumiyoshi and Watanabe, and other building dwellers such as co-worker Matsuya, and later Ropponmatsu, who all work for the Department of City Security under Dr. Kabapu, who intends to stop Across. Eventually the members of Across begin making appeals directly to the City’s citizens before Il Palazzo publicly declares the existence of Across and its intentions to the public. Hyatt is captured and Excel and Elgala are later held in an immigrant detention center before being rescued by Il Palazzo, who begins the new phase of his plans.
Since its August 2003 release in North America, the manga has been among the 50 top-selling graphic novels on three occasions.