Radaxian(ラダクシャン Radakushan), also spelled as Radactian, is one of the two nations that exist on the planet Aries and the homeland of Alex Kidd. It occupies the northern parts of the planet. The local currency is the Baum.
Radaxian was once ruled by King Thunder until it was invaded by Janken the Great who turned most of the populace into stone. He kidnapped the regent, Prince Igul and imprisoned him in Radaxian Castle. Igul's younger brother Alex Kidd, fought his way through Radaxian beating Janken's henchmen. He liberated Igul and eventually defeated Janken himself.