The main body of the book consists of 'Nihonkoku-ki' (chronicle of Japan), 'Ryukyukoku-ki' (chronicle of the Ryukyu Kingdom) and 'Chohei Osetsu-ki' (chronicle of the Joseon envoy's reception), each of which records details of history, geography, rulers and language.
本文は「日本国紀」、「琉球国紀」、「朝聘応接紀」に分かれ、それぞれの歴史、地理、支配者、言語などを詳細に記す。