Mon-in Reizei was chugu, or a consort of Emperor Godaigo.
Mon-in was born in 1303. She was the third daughter of Sanekane Saionji, Prime Minister.
When Emperor Godaigo was exiled to Oki Island, she was in Ise Province (Mie Prefecture) and became a nun and took the name of Reizei-mon-in. Upon the Emperor's return from Oki, she was reinstated as Empress Consort but died soon afterward. Her posthumous name was Nochi-no-Kyogokuin.