Answer: Chrysanthemum Throne
The chrysanthemum throne is the name given to the imperial throne of Japan, representing the institution of the Japanese monarchy.
Its name comes from the fact that the chrysanthemum is the national flower of Japan, as well as being the coat of arms of the emperor.
In this sense, the Chrysanthemum Throne is the oldest monarchy in the world, and Emperor Naruhito is the 126th direct descendant of Jimmu, according to tradition.
It is important to note that Naruhito recently ascended the throne on April 30th, 2019, after his father, Akihito, abdicated the throne. It is worth noting that it is the first time in more than 200 years of the history of the Japanese monarchy that an emperor abdicates his throne.