Before Go-Sai's accession to the Chrysanthemum Throne, his personal name (imina) was Nagahito (良仁)[4] or Yoshihito;[3] and his pre-accession title was Hide-no-miya (秀宮) or Momozono-no-miya.

After abdicating, Go-sai put his heart into scholarship and he left behind many books, including the "Water and Sun Collection" (Suinichishū, 水日集).

Emperor Go-Sai is enshrined in the imperial mausoleum, Tsuki no wa no misasagi, at Sennyū-ji in Higashiyama-ku, Kyoto.

Go-Sai's immediate Imperial successors, including Reigen, Higashiyama, Nakamikado, Sakuramachi, Momozono, Go-Sakuramachi and Go-Momozono, are enshrined here as well.

[12] Kugyō (公卿) is a collective term for the very few most powerful men attached to the court of the Emperor of Japan in pre-Meiji eras.

[3] [13] Unless otherwise noted (as BC), years are in CE / AD  * Imperial Consort and Regent Empress Jingū is not traditionally listed.