Why did the State Shinto promoted the belief that who was the offspring of Amaterasu?

State Shinto promoted the belief that the Emperor of Japan was the direct descendant of Amaterasu, the sun goddess, to legitimize the Emperor's divine authority and reinforce national unity. This ideology fostered a sense of national identity and pride, intertwining religious and political power. By positioning the Emperor as a divine figure, State Shinto sought to solidify loyalty among the populace and justify the state's actions, particularly during militaristic expansions. This belief underscored the sacred nature of the Japanese imperial system and its central role in society.