Reigning Emperor (Japanese: 今上天皇, Hepburn: Kinjō Tennō) or Majesty (陛下, Heika), according to protocol, is the honorific title used in Japan to refer to the current Emperor of Japan instead of using their personal name (e.g. Hirohito), as is done in the West.[1][2] The only context where the personal name is used is when referring to their time before taking the throne (e.g. Prince Hirohito 裕仁親王 Hirohito shinnō).
"In Japan, the personal name of the Emperor is never used by the people. He is always spoken of as the Heika or the Kinjo no Heika while living, and after his death is spoken of as the "Meiji Tenno" or " Taisho Tenno".