The Emperor as a Symbol
The Emperor is considered the symbol of Japan.
The Emperor (TennÅ) is said to be the symbol of the country of Japan.
When representing something invisible, we use the word "symbol."
When we say the Emperor is the symbol of Japan, it means that the Emperor is a symbol that makes people think of the country of Japan.
The position of Emperor has been passed down. The current imperial era is Reiwa and Emperor Naruhito is the 126th Emperor.