Lifespan: Eiroku 11 to 7/16 of Kanei 14 (1637)
Title: Inspector of the Board of Censors (honorary)
Lord: Mogami Yoshiaki → Date Masamune
Father: Akiu Katsumori
Siblings: Sukemori, Naomori
Wife: Daughter of Tendō Yorisada, daughter of Naruse Yoshietsu
Children: Sadamori, Morichika, Moritsugu
Akiu Naomori served as a bushō during the Azuchi-Momoyama and early Edo periods. Naomori served as the twelfth head of the Akiu clan who were the landowners of the Gokamura manor in the Akiu township of the Natori District of Mutsu Province. The kokujin, or landowner, class in Mutsu later served the Date clan and became retainers of the Sendai domain.
In 1568, Naomori was born as the third son of Akiu Katsumori, a landowner and lord of Tateyama Castle in the 長袋 neighborhood of the Akiu township. Following the death of his older brother, Akiu Sukemori, Naomori inherited the Akiu family and manor and adopted the name of Akiu Danjō-no-jō Naomori. He had the common name of Heigorō.
In 1579, his base at Tateyama Castle burned down, so, upon request of his father, he took the followers of the family and, after traversing the Futakuchi Pass to seek the protection of the Mogami clan. Within three years, he returned to the Akiu township. During this time, he wed the daughter of Tendō Yorisada and received a stipend of 1,000 koku in Higashine for living expenses from Mogami Yoshiaki.
In 1584, Tendō Yorizumi (the second son and heir of Yorisada) was attacked by Mogami Yoshiaki at Tendō Castle and fled to the Akiu clan for assistance. Yorizumi remained with the clan until the Bunroku era (1593 to 1596). Yorizumi was cousin of Naomori on his mother’s side of the family, and he was the older brother of Naomori’s wife. In 1586, Naomori obeyed orders from Date Masamune to participate in an attack on Nihonmatsu Castle.
In the tenth month of 1587, after a rebellion by Ayukai Munenobu reignited tensions between the Date and Mogami clans, Naomori was ordered by Masamune to strengthen security on the Futakuchi Pass on the territorial border with the Mogami. Thereafter, he was subject to repeated incursions by the Mogami but repelled all of them. The Akiu township was in a strategic location for a central transportation route so Masamune sent reinforcements led by Yamaji Mondo as the commander-in-chief to the Akiu township. On 5/12 of Tenshō 16 (1588), Yamaji Nagato arrived in Akiu with additional reinforcements. This army was dispatched on request of Naomori to strengthen defenses against the Mogami in Akiu in view of Masamune’s deployment from Yonezawa on a campaign to subdue Ishikawa Mitsumasa at Odemori Castle in response to Mitsumasa’s collusion with Sōma Yoshitane during the Battle of Kōriyama.
In the seventh month of 1588, after a reconciliation between the Date clan on one side and the Mogami, the Ōsaki, and the Kurokawa on the other side, Naomori obeyed Masamune and, in 1590, joined in battle against the Sōma clan and an attack on Ōzato Castle. In 1591, he further participated in the suppression of the Kasai-Ōsaki Uprising, after which Masamune appointed him a member of the family and recognized his rights as the owner of the neighborhoods comprising the Akiu township (Yumoto, Sakaino, 長袋, Baba, and Shinkawa).
In 1603, around the time that Masamune moved from Iwadeyama to Sendai, upon orders from Masamune, Naomori relinquished 長袋 and moved to the neighborhood of Komurasaki (300 koku) in the Katta District, Akiu Yorishige from a cadet family (also known as Baba Yorishige) gave up the Baba neighborhood and moved to the Enda (200 koku) in the Katta District, and Sakaino Moritada turned over the Sakaino and Shinkawa neighborhoods and moved to Ōmura (100 koku) in the Kami District. As a result, the Akiu township came under the direct jurisdiction of the Sendai domain.
In 1615, Naomori’s eldest son, Akiu Sadamori, deployed to the Siege of Ōsaka. In 1627, at a new year’s ceremony, Naomori sat in an upper seat to the right indicating seniority in the family. He died on 7/16 of Kanei 14 (1637) at the age of seventy.