Tsukuda Kazunari served as a bushō from the Sengoku to early Edo periods.  He was a retainer of Katō Yoshiakira.  In the Edo period, he served as a chief retainer of the Iyo-Matsuyama domain.

In 1553, Kazunari was born in Sanage in the Kamo District of Mikawa Province.  He was the son of Iwamatsu Genban-no-jō, a dogō, or small-scale landowner.

Initially, he obeyed Oda Nobunaga.  Later, he served Tokugawa Ieyasu.  In 1585, a dispute over a trifling matter led to his expulsion from the province and he lived in seclusion in Tsukuda in the Nishinari District of Settsu Province.  He then adopted the name of Tsukuda Kazunari.

Later, he was invited by Katō Yoshiakira to serve as a retainer.  He served valorously in the Pacification of Kyūshū, the Conquest of Odawara, and the Bunroku-Keichō Campaign.  Afterwards he was promoted to the role of chief retainer.  In 1600, while his lord, Yoshiakira, deployed for the Battle of Sekigahara, Kazunari remained behind with Adachi Shigenobu to guard Matsumae Castle on his lord’s territory in Iyo Province.  On 9/18 of Keichō 5 (1600), Kazunari repelled forces comprised of former retainers of the Kōno clan who rebelled with the support of the Mōri.  This is known as the Nighttime Attack at Mitsuhama.  Owing to these contributions, after the battle, Kazunari was awarded a fief of 6,000 koku in Kumayama in the Ukena District of Iyo.  During the construction of Matsuyama Castle, Kazunari was in charge of the site and as a senior retainer of the Katō family, had a magnificent room in the northern quarter of the castle.

In 1634, Kazunari died.