Maeba Kagemasa served as a bushō during the Sengoku period. He was a retainer of the Asakura clan.
The Maeba clan were jizamurai, or local samurai, based in the village of Maeba in the environs of the main base of the Asakura clan in Ichijōdani in Echizen Province. The Maeba were a leading clan among those who served directly for the Asakura.
Kagemasa was born to the Tōemon-no-jō family who were the lineage of the eldest son of the Maeba clan. Beginning around 1565, Kagemasa served as a magistrate for Asakura Yoshikage. In the fifth month of 1568, when Ashikaga Yoshiaki (the fifteenth shōgun of the Muromachi bakufu) visited the residence of the Asakura, Kagemasa greeted and hosted him as the head of the group of elders. In the seventh month of the same year, when Yoshiaki departed from Ichijōdani and headed toward the territory of Oda Nobunaga, Kagemasa joined Asakura Kagetsune to lead an army of 2,000 soldiers to guard Yoshiaki to Ōmi Province. In the ninth month of 1570, Kagemasa deployed on behalf of Yoshikage to western Ōmi at the Siege of Shiga. During the deployment, his name appears on an addendum to a ban issued by Yoshikage to the Kamowake-ikazuchi Shrine for refusing to contribute funding for the conflict. On 11/26, after Ikai Nobusada of the Katata group betrayed the Asakura by surrendering to Oda Nobunaga, Kagemasa joined Asakura Kageakira to attack. Sakai Masahisa, a senior retainer of Nobunaga, was killed in the attack, but so was Kagemasa.
Kagemasa’s son, Katsuhide, was also called Kichiemon or Hannyū. His movements after decimation of the Asakura clan (in the eighth month of 1573) are uncertain, but he later served Toyotomi Hideyoshi as a member of the otogishū, or group of experienced individuals who directly supported high-ranking lords including by sharing stories, writings, and so forth. Later, he served Tokugawa Ieyasu.