Prince Sadanari

Son of Prince Fushiminomiya Yoshihito. Father of Emperor Gohanazono. His birth mother was a daughter of Chunagon Sanjo Saneharu, a member of the West Court. He came of age in 1411 (Oei 18) at the age of 40. After the death of his elder brother Prince Haruhito, he succeeded the Fushiminomiya family at the age of 46, and in April 1422, he became the adopted son of Emperor Gokomatsu and was proclaimed prince. Soon after, rumors spread that Sadanari would succeed to the throne in place of Emperor Shoko, who was sickly and had no heir. Following the wishes of Emperor Gokomatsu, who was concerned about the situation, he shaved his head in July of the same year. His posthumous name was Dokin. When Emperor Shoko died in 28 (Shocho 1), Sadahira's son Prince Hikohito became the adopted son of Emperor Gokomatsu and ascended to the throne as Emperor Gohanazono. Sadahira desired the title of Retired Emperor, and received it in 47 (Bun'an 4). He died on August 29, 2nd year of the Kōshō era. His posthumous name was Gosukoin. His diary "Kanmon Gyoki", written with a strong sense of curiosity and thirst for knowledge, has been handed down in the original handwritten version. His other works include "Chin'yōki", about the imperial lineage, written for Emperor Gohanazono, and "Sagyokushu", a collection of poems.

[Hiromi Tanaka]

"Kanmon Goki: Between the 'Kings' and the 'Common People'" by Kiyoshi Yokoi (Diaries and Records of Japanese History Series 16, 1979, with additional commentary)

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

伏見宮(ふしみのみや)栄仁親王の子。後花園(ごはなぞの)天皇の父。生母は西御方で中納言三条実治の女(むすめ)。1411年（応永18）40歳で元服。兄治仁(はるひと)王の死後46歳にして伏見宮家を継ぎ、25年4月後小松(ごこまつ)上皇の猶子(ゆうし)となって親王宣下を受けた。ほどなく、病弱で継嗣(けいし)のない称光(しょうこう)天皇にかわって貞成が皇位を嗣(つ)ぐであろうという噂(うわさ)がたち、事態を憂えた後小松上皇の意を受けて、同年7月には剃髪(ていはつ)した。法号道欽(どうきん)。28年（正長1）称光天皇が没すると、貞成の子彦仁(ひこひと)親王が後小松上皇の猶子となって践祚(せんそ)し、後花園天皇となった。貞成は太上(だいじょう)天皇の尊号を懇望し、47年（文安4）これを受けた。康正(こうしょう)2年8月29日没。諡号(しごう)を後崇光院(ごすこういん)という。旺盛(おうせい)な好奇心・知識欲をもって書かれた日記『看聞御記(かんもんぎょき)』が自筆原本で伝わっている。ほかに後花園天皇のために皇統について著した『椿葉記(ちんようき)』や歌集『沙玉(さぎょく)集』がある。

［田中博美］

『横井清著『看聞御記「王者」と「衆庶」のはざまにて』（『日記・記録による日本歴史叢書16』1979・そしえて）』

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