The Nihon Shoki (日本書紀), sometimes translated as The Chronicles of Japan, is the second oldest book of classical Japanese history of Japan. It is more elaborate and detailed than the Kojiki, the oldest, and has proven to be an important tool for historians and archaeologists as it includes the most complete extant historical record of ancient Japan. The Nihon Shoki was finished in 720 under the editorial supervision of Prince Toneri and with the assistance of Ō no Yasumaro. The book is also called the Nihongi (日本紀, lit. Japanese Chronicles).