Yes, during the reign of Emperor Guangwu of the Han Dynasty, Japan became a vassal of the Han Dynasty, and was appointed as the governor of the King of Han Polo and the Anton House, giving them a golden seal, which can be seen in Fukuoka, Japan today.

Later, for a long time, the Japanese King of Japan got the title of "Pro-XX King of Japan, viceroy of Anton" from Emperor China. Until the reform of Shoto Kutaishi.