Nihongi Ryaku (Summary of Japanese Chronologies) is a Japanese history text compiled during the Heian period which contains excerpts from Rikkokushi (the Six National Histories) and details of the history from the completion of Rikkokushi until the reign of Emperor Goichijo.
日本紀略（にほんぎりゃく）は、平安時代に編纂された歴史書で、六国史の抜粋と、六国史以後後一条天皇までの歴史を記す。