Although it is less powerful than Germany, Imperial Japan is a nuclear power that keeps the Reich at bay with the implicit threat of mutually assured destruction. Moreover, Japan has its own subordinate rulers (only the Emperor of Manchukuo is mentioned) in the Greater East Asia Co-Prosperity Sphere. Despite having "an ocean of slave labor" at its disposal, Japan now concentrates upon developing high technologies. Despite the Germano–Nipponese alliance, the Nazis consider the Japanese to be racially inferior and lacking in creativity, using propaganda pointing to a perceived decrease in Japan's technological advances as proof. Even so, Japanese tourists, students and restaurants are commonly seen within the Reich.