Rikkokushi (六国史) is a general term for Japan's Six National Histories chronicling the mythology and history of Japan from the earliest times to 887.
[1] The six histories were written at the imperial court during the 8th and 9th centuries, under order of the Emperors.
[2] The basic sources were the court records kept by the Ministry of Central Imperial Affairs, and the biographies of meritorious officials composed in the Ministry of Ceremonial Affairs.
[3] The collection consists of the following texts: The national histories were discontinued after the Sandai Jitsuroku; they were followed by the four Mirror books (starting with Ōkagami).