is an unfinished Japanese official historical work compiled, in part, by the early Heian period scholar , grandson of à Âe no Otondo, who had been one of the compilers of the Nihon Montoku Tennà  Jitsuroku. After Asatsuna's death in 957, his cousin à Âe no Koretoki became the head compiler. It was supposed to succeed the Six National Histories.
The Shinkokushi is recorded in the ' as having forty volumes and covering the reigns of Emperor Uda (887-897) to Emperor Daigo (897-930). However a later work, the ', states that the Shinkokushi was fifty volumes and included the reign of Emperor Suzaku (930-946) as well as Uda and Daigo. Because of the differences in size, lack of a formal title, and that no record of a presentation of the work survives, it is believed that the Shinkokushi was an unfinished manuscript. As a manuscript, the entirety of the Shinkokushi does not survive but instead portions of it have been passed down in other works.