Emperor Koan
Encyclopedia
; also known as Yamatotarashihikokunioshihito no Mikoto; was the sixth emperor
Emperor
An emperor is a monarch, usually the sovereign ruler of an empire or another type of imperial realm. Empress, the female equivalent, may indicate an emperor's wife or a woman who rules in her own right...

 of Japan
Japan
Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

, according to the traditional order of succession.

No firm dates can be assigned to this emperor's life or reign, but he is conventionally considered to have reigned from 392 BC through 291 BC, but he may have lived in the early 1st century.

Legendary narrative

Modern scholars have come to question the existence of at least the first nine emperors; and Kōan's descendant, Emperor Sujin
Emperor Sujin
; also known as Mimakiiribikoinie no Sumeramikoto or Hatsukunishirasu Sumeramikoto; was the tenth emperor of Japan, according to the traditional order of succession....

 is the first many agree might have actually existed. The name Kōan-tennō was assigned to him posthumously
Posthumous name
A posthumous name is an honorary name given to royalty, nobles, and sometimes others, in East Asia after the person's death, and is used almost exclusively instead of one's personal name or other official titles during his life...

 by later generations.

Kōan is regarded by historians as a "legendary emperor" and there is a paucity of information about him. There is insufficient material available for further verification and study. The reign of Emperor Kimmei
Emperor Kimmei
was the 29th emperor of Japan, according to the traditional order of succession.His reign is said to have spanned the years from 539 through 571.-Traditional narrative:...

 (509-571), the 29th emperor of Japan
Japan
Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

 according to the traditional order of succession, is the first for which contemporary historiography are able to assign verifiable dates; however, the conventionally accepted names and dates of the early emperors were not to be confirmed as "traditional" until the reign of Emperor Kammu
Emperor Kammu
was the 50th emperor of Japan, according to the traditional order of succession. Kammu reigned from 781 to 806.-Traditional narrative:Kammu's personal name was . He was the eldest son of Prince Shirakabe , and was born prior to Shirakabe's ascension to the throne...

 (737–806), the 50th sovereign of the Yamato dynasty.

In Kojiki
Kojiki
is the oldest extant chronicle in Japan, dating from the early 8th century and composed by Ō no Yasumaro at the request of Empress Gemmei. The Kojiki is a collection of myths concerning the origin of the four home islands of Japan, and the Kami...

and Nihonshoki only his name and genealogy were recorded. He is believed to be son of Emperor Kōshō; and his mother is believed to have been Yosotarashi-no-hime, who was the daughter of Okitsuyoso, and ancestress of the Owari. The Japanese have traditionally accepted this sovereign's historical existence, and an Imperial misasagi or tomb for Kōan is currently maintained; however, no extant contemporary records have been discovered which confirm a view that this historical figure actually reigned. He is considered to have been the fifth of eight emperors without specific legends associated with them, also known as the .

Jien
Jien
Jien was a Japanese poet, historian, and Buddhist monk.-Biography:Jien was the son Fujiwara no Tadamichi, a member of the Fujiwara family of powerful aristocrats. He joined a Buddhist monastery of the Tendai sect early in his life, first taking the Buddhist name Dokaie, and later changing it to...

 records that Kōan was the second son of Emperor Kōshō
Emperor Kosho
; also known as Mimatsuhikokaeshine no Mikoto; was the fifth emperor of Japan, according to the traditional order of succession.No firm dates can be assigned to this emperor's life or reign, but he is conventionally considered to have reigned from 475 to 393 BC, but he may have lived in the early...

, and that he ruled from the palace of Akitsushima-no-miya at Muro in what will come to be known as Yamato province
Yamato Province
was a province of Japan, located in Kinai, corresponding to present-day Nara Prefecture in Honshū. It was also called . At first, the name was written with one different character , and for about ten years after 737, this was revised to use more desirable characters . The final revision was made in...

.

Kōan is a posthumous name
Posthumous name
A posthumous name is an honorary name given to royalty, nobles, and sometimes others, in East Asia after the person's death, and is used almost exclusively instead of one's personal name or other official titles during his life...

. It is undisputed that this identification is Chinese in form and Buddhist in implication, which suggests that the name must have been regularized centuries after the lifetime ascribed to Kōan, possibly during the time in which legends about the origins of the Yamato dynasty were compiled as the chronicles known today as the Kojiki
Kojiki
is the oldest extant chronicle in Japan, dating from the early 8th century and composed by Ō no Yasumaro at the request of Empress Gemmei. The Kojiki is a collection of myths concerning the origin of the four home islands of Japan, and the Kami...

.

The actual site of Kōan's grave
Grave (burial)
A grave is a location where a dead body is buried. Graves are usually located in special areas set aside for the purpose of burial, such as graveyards or cemeteries....

 is not known. This emperor is traditionally venerated at a memorial
Memorial
A memorial is an object which serves as a focus for memory of something, usually a person or an event. Popular forms of memorials include landmark objects or art objects such as sculptures, statues or fountains, and even entire parks....

 Shinto
Shinto
or Shintoism, also kami-no-michi, is the indigenous spirituality of Japan and the Japanese people. It is a set of practices, to be carried out diligently, to establish a connection between present day Japan and its ancient past. Shinto practices were first recorded and codified in the written...

 shrine
Shrine
A shrine is a holy or sacred place, which is dedicated to a specific deity, ancestor, hero, martyr, saint, daemon or similar figure of awe and respect, at which they are venerated or worshipped. Shrines often contain idols, relics, or other such objects associated with the figure being venerated....

 (misasagi) at Nara
Nara, Nara
is the capital city of Nara Prefecture in the Kansai region of Japan. The city occupies the northern part of Nara Prefecture, directly bordering Kyoto Prefecture...

.

The Imperial Household Agency
Imperial Household Agency
The is a government agency of Japan in charge of the state matters concerning Japan's imperial family and also keeping the Privy Seal and the State Seal...

 designates this location as Kōan's mausoleum
Mausoleum
A mausoleum is an external free-standing building constructed as a monument enclosing the interment space or burial chamber of a deceased person or persons. A monument without the interment is a cenotaph. A mausoleum may be considered a type of tomb or the tomb may be considered to be within the...

. It is formally named Tamate no oka no e no misasagi.

Consorts and Children

Empress:Oshihime (押媛), daughter of Amatarashikunioshihito (天足彦国押人命)
  • Prince Ōkibi no Morosusumi (大吉備諸進命)
  • Prince Ōyamatonekohikofutoni (大日本根子彦太瓊尊) Emperor Kōrei
    Emperor Korei
    ; also known as Ooyamatonekohikofutoni no Mikoto; was the seventh emperor of Japan, according to the traditional order of succession.No firm dates can be assigned to this emperor's life or reign, but he is conventionally considered to have reigned from 290 BC–215 BC, but he may have lived in the...

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