The late legal scholar Keith Aoki wrote on a wide range of legal issues, from intellectual property and genetic engineering to immigration and racial politics. This retrospective highlights his work on space, legal geography, and local government law. Aoki not only began his legal career exploring these issues, he also continuously drew upon their insights to frame legal inquiries in other fields as the scope of his research expanded. This essay shows Aoki to be more than an innovator in the study of space, legal geography and local government law. Indeed, he was one of their most important ambassadors.