The Japanese Emperor's title is composed of two words: Mikado (6 letters) and Tenno (5 letters). The term Mikado is derived from the Japanese characters for 'the honorable gate' and is used to refer to the Emperor of Japan. Tenno, on the other hand, is a title meaning 'heavenly sovereign' and is used to refer to the reigning Emperor. Together, these two words form the title of the Japanese Emperor.