Aburakawa Nobumori served as a bushi during the Sengoku and Azuchi-Momoyama periods.
The Aburakawa were members of the Takeda clan who were a direct lineage of the Kai-Genji, a collateral branch of the Kawachi-Genji descended from the Seiwa-Genji.
In the third month of 1582, the Takeda clan was decimated by the Oda clan. In the sixth month, Oda Nobunaga died in a coup d’état known as the Honnō Temple Incident. These events led to a conflict between the Tokugawa and Hōjō clans for control over the former territory of the Takeda clan in Kai, Shinano, and Kōzuke provinces. Despite lesser resources, the Tokugawa benefited from the support of local clans in Shinano. After months of fighting in the Tenshō Jingo Conflict, the Tokugawa and Hōjō settled on the basis of mediation by Oda Nobukatsu. As a condition of the settlement, the Tokugawa garnered control of Kai and Shinano while the Hōjō took over Kōzuke.
Nobumori’s name appears only in a written oath submitted by former retainers of the Takeda clan to Tokugawa Ieyasu in the wake of the Tenshō Jingo Conflict and the Battle of Kurokoma in 1582 in which the Tokugawa defeated the Hōjō.
Nobumori is a different individual than a son of Aburakawa Nobuyasu, Aburakawa Nobutomo (Aburakawa Genzaemon Nobumori).
Nobumori is surmised to have been the son of Takeda Nobumasa (the military governor of Kai) and a descendant of Aburakawa Nobuyoshi who was killed fighting against the forces of Takeda Nobutora at the Battle of Katsuyama in 1508.
The family genealogy and vestiges are uncertain. There is a theory that Nobumori is the same individual as Aburakawa Nobusada (Takeda Nobusada).