Based on "Shiseki nenpyo" (Chronological Table of Historical Events) by Nobutomo BAN, he wrote Japanese history of all through the period from the ancient and medieval times to the Meiji Restoration, and presented a view that the Emperor Jinmu's eastern expedition was an ethnic confrontation between the tenson jinshu (people descending from Ninigi no Mikoto, the grandchild of Amaterasu Omikami) and indigenous people.
伴信友の『史籍年表』などを元にして古代から明治維新までの歴史を描き、神武天皇の東征を天孫人種と土着人種の民俗対立と捉えた。