Since it is unreasonable to consider "Chikusho Kinen" and "Bokutenshiden" as koshi koden, his later works removed these two books and added "Kozan Hokan" and "Hokan Henbunrui."
この両書を古史古伝だというのは無理があり、後の著作では『竹書紀年』『穆天子伝』をはずし『香山宝巻』『宝巻変文類』を入れた形で発表されている。