1) Japanese era 
==Change of era== As is customary for choosing nengō, the name was selected from a passage in a historical Chinese text. In this case, the text was Classic of History (書経) (also quoted in The Great Learning (大學)). More specifically from the first of the King Tai Jia (大甲) chapters. It says: `先王顧諟天之明命...` meaning `The......