"Mikawa Monogatari'' is a military story written by Tadanori Okubo Hikozaemon, a hatamoto who served three generations of Tokugawa Ieyasu, Hidetada, and Iemitsu, and can be described as a book of family precepts. Three volumes, three books. The draft was completed in Genwa 8 (1622 A.D.), and revisions continued until around Kan'ei 3 (1626).
It records the accomplishments of successive generations of the Tokugawa family up
to Ieyasu's father, Hirotada, Ieyasu's life, and the various campaigns that ended with the Summer Campaign in Osaka, while writing down the loyalty of the Okubo family to their master. Furthermore, Tadanori's reminiscences and lessons for his descendants are recorded at the end of the scroll, in which he expresses his dissatisfaction that Fudai's vassals since Mikawa are now being treated poorly. In this complete collection, when converting "Mikawa Monogatari'' into a manga, I tried to involve Tadanori with Isshin Tasuke, who is well known for his stories and movies.