In politics, a figurehead is a person who holds de jure an important (often supremely powerful) title or office yet de facto executes little actual power, most commonly limited by convention rather than law. but in some cases may have little power even by law. The metaphor derives from the carved figurehead at the prow of a sailing ship. Other figureheads are the Emperor Akihito of Japan, or presidents in some parliamentary republics, such as the President of India, President of Israel, President of Bangladesh, President of Greece, President of Germany, President of Pakistan, and the President of the People's Republic of China (without CPC General Secretary post). While the authority of a figurehead is in practice generally symbolic or ceremonial, public opinion, respect for the office or the office holder and access to high levels of government can give them significant influence on events. In those systems of government where the head of state is in practice a figurehead, they are also generally the titular commanders in chief of the nation's defence forces.