The histories written in this style are called "Rikkokushi" (The Six National Histories of Japan), ending with the sixth, the Nihon Sandai Jitsuroku (Veritable Records of Three Reigns of Japan), which was compiled in 901 (and recorded the events of 858 to 887); after this point, despite working on the compilation of historical records, the Imperial Court was no longer able to bring such histories to completion.
これらは六国史と呼ばれているが、901年に撰された『日本三代実録』（858年から887年までの30年間の歴史書）を最後に、朝廷による正史編纂事業は行われても完成をみることはなくなった。