Isaac Titsingh, "Nijo" em Annales des empereurs du japon, (em francês) Paris: Royal Asiatic Society, Oriental Translation Fund of Great Britain and Ireland pp. 191-194 OCLC5850691.
Donald Keene. (1999). Seeds in the Heart: Japanese Literature from Earliest Times to the Late Sixteenth Century (em inglês). New York: Columbia University Press. pp. 616-623 ISBN 9780231114417; OCLC246429887
Isaac Titsingh, "Nijo" em Annales des empereurs du japon, (em francês) Paris: Royal Asiatic Society, Oriental Translation Fund of Great Britain and Ireland pp. 191-194 OCLC5850691.
Donald Keene. (1999). Seeds in the Heart: Japanese Literature from Earliest Times to the Late Sixteenth Century (em inglês). New York: Columbia University Press. pp. 616-623 ISBN 9780231114417; OCLC246429887