Satohito (Japanese: 識仁), posthumously honored as Emperor Reigen (霊元天皇, Reigen-tennō; 9 July 1654 – 24 September 1732) was the 112th emperor of Japan, according to the traditional order of succession. Reigen's reign spanned the years from 1663 through 1687.
Before Reigen's ascension to the Chrysanthemum Throne, his personal name (imina) was Satohito (識仁); and his pre-accession title was Ate-no-miya (高貴宮).
Reigen was the 16th son of Emperor Go-Mizunoo. His mother was the daughter of Minister of the Center Sonomotooto (内大臣園基音), Lady-in-Waiting Kuniko (新広義門院国子).
Reigen's Imperial family lived with him in the Dairi of the Heian Palace. This family included at least 13 sons and 14 daughters:
Empress: Takatsukasa Fusako (鷹司房子) later Shin-jyōsaimon’in (新上西門院), Takatsukasa Norihira’s daughter.
Third daughter: Imperial Princess Masako (1673–1746; 栄子内親王) married Nijo Tsunahira
Lady-in-waiting: Bōjō Fusako (1652–1676; 坊城房子), Bōjō Toshihiro’s daughter
Second daughter: Imperial Princess Ken'shi (憲子内親王; 1669–1688) married Konoe Iehiro
Lady-in-waiting: Chunagon-Naishi (1653–1691; 中納言典侍)
First son: Imperial Prince Priest Saishin (1671–1701; 済深法親王)
Lady-in-waiting: Matsuki Muneko (松木宗子) later Keihōmon’in (敬法門院), Mutsuki Muneatsu’s daughter
Fourth son: Imperial Prince Asahito (朝仁親王), also known as Tomohito, later Emperor Higashiyama
Fifth daughter: Imperial Princess Tomiko (福子内親王; 1676–1707) married Imperial Prince Fushimi-no-miya Kuninaga
Sixth daughter: Princess Eisyū (永秀女王; 1678–1725)
Seventh son: Imperial Prince Kyōgoku-no-miya Ayahito (1680–1711; 京極宮文仁親王) – Seventh Kyōgoku-no-miya
Seventh daughter: Princess Ume (1681–1683; 梅宮)
Eighth daughter: Imperial Princess Katsuko (1686–1716; 勝子内親王)
Eighth son: Prince Kiyo (1688–1693; 清宮)