Similar investigations were also conducted when "Kai kokushi" was compiled as a general topography of Kai Province, although its description of the Takeda clan was based on "Koyo Gunakan".
同様に、甲斐国の総合地誌として編纂された『甲斐国志』では武田氏関係の記述は『甲陽軍鑑』がベースとなっているが編纂に伴う古文書調査は行われている。