元号 Japanese traditional era name

天皇陛下が在位30年を節目として譲位を希望されました。その故に2019年1月1日に皇太子が天皇になり、同日から新元号になります。
天皇陛下が変わる度に、リセットされる年号表示は何かと不便です。

His Majesty the Emperor considered the 30 years of his reign as a turning point and hoped for abdication. Therefore, Crown Prince becomes the Emperor on January 1, 2019, and the new name of an era is used from the same day.
When His Majesty the Emperor changes, the name of era is changed and the consecutive number is also reset. That is inconvenient in various ways.

Princess Michiko