Katō Nobumori served as a bushō during the Sengoku and Azuchi-Momoyama periods.  He was a retainer of the Oda clan.

The Katō clan had, for generations, used the first name of Zusho-no-suke.  Nobumori was based at Atsutaha Castle in Owari Province.  When Takechiyo (later known as Tokugawa Ieyasu) was captured by the Oda en route as a hostage to the Imagawa clan, he was incarcerated at Atsutaha Castle.  In the prelude to the Battle of Okehazama, Nobumori welcomed Nobunaga at Atsuta and attended a service to pray for victory.

One of his sons, Katō Yasaburō, also participated in the Battle of Okehazama.