What is "masukagami"

is a Japanese historical tale written in the early Muromachi period believed to be between 1368 to 1376. The author is not known but is believed to be Nijō Yoshimoto. It is the last of four works of mirror series and follow most recent events.

Masukagami is a twenty volume in total and follow events from 1183 to 1333 in accordance with the way Chinese classical historical tale were written. It starts with the accession of Emperor Go-Toba and ends with Emperor Go-Daigo's punishment of being deported to an island of Oki Province. The story is told through a fictitious hundred years old Buddhist nun of Seiryō-ji.