Dazheng comes from the nineteenth book of changes, "Dear, just soak and grow". It's easy to say it, just respond, the tycoon is right, and heaven is also right. "
Showa, from China's Shangshu Yaodian, "People are bright and harmonious."
Heisei comes from Historical Records of the Five Emperors and Yu! It is a merit that the land is flat and natural, and the six governments allow three things to be ruled, which will last forever. It means "harmony between heaven and earth, inside and outside".