The Chrysanthemum Throne (皇位, kōi, "imperial seat") is the throne of the Emperor of Japan. The term also can refer to very specific seating, such as the Takamikura (高御座) throne in the Shishin-den at Kyoto Imperial Palace.
 Various other thrones or seats that are used by the Emperor during official functions, such as those used in the Tokyo Imperial Palace or the throne used in the Speech from the Throne ceremony in the National Diet, are, however, not known as the "Chrysanthemum Throne".
 In a metonymic sense, the "Chrysanthemum Throne" also refers rhetorically to the head of state and the institution of the Japanese monarchy itself.
 Japan is the oldest continuing hereditary monarchy in the world. In much the same sense as the British Crown, the Chrysanthemum Throne is an abstract metonymic concept that represents the monarch and the legal authority for the existence of the government.  Unlike its British counterpart, the concepts of Japanese monarchy evolved differently before 1947 when there was, for example, no perceived separation of the property of the nation-state from the person and personal holdings of the Emperor.
 According to legend, the Japanese monarchy is said to have been founded in 660 BC by Emperor Jimmu; Emperor Naruhito is the 126th monarch to occupy the Chrysanthemum Throne. The extant historical records only reach back to Emperor Ōjin, regarded as the 15th emperor, and who is considered to have reigned into the early 4th century. 
 In the 1920s, then-Crown Prince Hirohito served as regent during several years of his father's reign, when Emperor Taishō was physically unable to fulfill his duties. However, the Prince Regent lacked the symbolic powers of the throne which he could only attain after his father's death.
 The current Constitution of Japan considers the Emperor as "the symbol of the State and of the unity of the people." The modern Emperor is a constitutional monarch. The metonymic meanings of "Chrysanthemum Throne" encompass the modern monarchy and the chronological list of legendary and historical monarchs of Japan.
 The actual throne Takamikura (高御座) is located in the Kyoto Imperial Palace. It is the oldest surviving throne used by the monarchy. The current model was built for the enthronement ceremony of Emperor Taisho in 1912. It sits on an octagonal dais, 5 metres (16 ft) above the floor. It is separated from the rest of the room by a curtain. The sliding door that hides the Emperor from view is called the kenjō no shōji (賢聖障子), and has an image of 32 celestial saints painted upon it, which became one of the primary models for all of Heian period painting. The throne is used mainly for the enthronement ceremony, along with the twin throne michodai (御帳台, august seat of the Empress). 
 For the Enthronement of Emperors Akihito and Naruhito, both the Takamikura and Michodai thrones were taken apart, refurbished and reassembled at the Seiden State Hall of the Imperial Palace in Tokyo where the ceremonies are now held.
 The Imperial Throne of the Emperor of Japan was in the House of Peers from 1868 until 1912. The Emperor still uses the throne during ceremonies of the National Diet and for non-political statements. For example, he uses the throne during the Speech from the Throne ceremony in the House of Councillors. The ceremony opens ordinary Diet sessions (each January and after elections) and extra sessions (usually in autumn). The throne features real gold with details such as the 16 petal chrysanthemum seal, two lion heads, two phoenixes and the sun disc.
 This flexible English term is also a rhetorical trope. Depending on context, the Chrysanthemum Throne can be construed as a metonymy, which is a rhetorical device for an allusion relying on proximity or correspondence, as for example referring to actions of the Emperor as "actions of the Chrysanthemum Throne."  e.g.,
 During the 2007 state visit by the Emperor and Empress of Japan to the United Kingdom, the Times reported that "last night’s dinner was as informal as it could get when the House of Windsor entertains the Chrysanthemum Throne."