Honki from the Emperor Jinmu to Go-Daigo was written in June, 1676 and the book was completed as "Shinsenkiden," the 104 volumes, between 1681 and 1683 but Mitsukuni felt it was necessity to cover the reign of the Emperor Go-Kameyama and he was dissatisfied with its insufficient contents, so he reformed the compiling organization, created a post for president in Shokokan, built a new building, increased the number of staff and expanded its work to compiling collections of poems.
延宝4年（1676年）6月には神武天皇から後醍醐天皇までの本紀が清書され、天和(日本)年間には『新撰紀伝』104巻として完成するが、光圀は南北朝合一の後亀山天皇期まで扱う必要性と内容上の不備を感じ、同年には彰孝館に総裁を置いて機構を改革し、新館を新築して史館員も増員させ、国史以外にも詩文集など編纂事業が拡大していった。