(collective) the Six National Histories (日(に)本(ほん)書(しょ)紀(き) (Nihon Shoki), 続(しょく)日(に)本(ほん)紀(ぎ) (Shoku Nihongi), 日(に)本(ほん)後(こう)紀(き) (Nihon Kōki), 続(しょく)日(に)本(ほん)後(こう)紀(き) (Shoku Nihon Kōki), 日(に)本(ほん)文(もん)徳(とく)天(てん)皇(のう)実(じつ)録(ろく) (Nihon Montoku Tennō Jitsuroku), 日(に)本(ほん)三(さん)代(だい)実(じつ)録(ろく) (Nihon Sandai Jitsuroku))