younger brother, she reascended the throne as Empress Saimei on February 14, 655, and ruled until her death on August 24, 661. She was succeeded by her and Emperor Jomei's son, Naka no Ōe, as Emperor Tenji. Unonosasara, Empress Jitō (持統天皇 Jitō Tennō) was the 41st imperial ruler of Japan, and ruled from 686 until 697. The previous emperor was her uncle and husband, Emperor Tenmu, and she later abdicated the throne to her grandson Emperor Monmu. Ahe, Empress Genmei (also Empress Genmyō; 元明天皇 Genmei Tennō) was the 43rd imperial ruler of Japan ruling 707–715 (died December 7, 721). She was Empress Jitō's younger half-sister and the mother of Emperor Monmu, who died in an young age. Hitaka, Empress Genshō (元正天皇 Genshō Tennō) was the 44th monarch of Japan (715–724). She succeeded after her mother Empress Genmei and later abdicated to her nephew Emperor Shōmu, son of Emperor Monmu. Abe, Empress Kōken (孝謙天皇 Kōken Tennō) also Empress Shōtoku (称徳天皇 Shōtoku Tennō) was the 46th imperial ruler of Japan from 749 to 758, and the 48th from 764 to 770. Her posthumous name for her second reign (764–770) was Empress Shōtoku. She never married and her ex-crown prince was Prince Bunado, her first cousin twice removed, but after her death, another of her cousins ascended the throne as Emperor Kanmu, who was also her brother-in-law. Okiko, Empress Meishō (明正天皇 Meishō Tennō) was the 109th empress of Japan, reigning from December 22, 1629, to November 14, 1643. She ascended upon the abdication of her father, being the eldest surviving child of her parents (the empress, Tokugawa Masako, had only four daughters without surviving sons), holding priority over her younger half-brothers. Toshiko, Empress Go-Sakuramachi (後桜町天皇 Go-Sakuramachi Tennō) was the 117th empress of Japan, and ruled from September 15, 1762, to January 9, 1771. She abdicated in favor of her young nephew. Surviving over forty years, the retired Empress held all those decades the position of Dajo Tenno, and acted as sort of guardian of subsequent emperors. Other than the eight historical empresses regnant, two additional empress are traditionally believed to have reigned, but historical evidence for their reigns is scant and they are not counted among the officially numbered Emperors/Empresses regnant: Empress Jingū r. 206–269 (Empress Consort of Emperor Chūai)—not counted among the officially numbered Emperors Iitoyo: Imperial princess and possibly empress regnant. She was baptized as Empress Tsunuzashi in the list of