Akaza Naoyasu (赤座 直保; ? - 1606) was one of Toyotomi Hideyoshi's retainers in Azuchi-Momoyama period. His government post was a Bingo-no-kami (備後守). a.k.a Akaza Kyubei (赤座 久兵衛) and Akaza Yoshiie (赤座 吉家). His father maight be Akaza Naonori (赤座 直則), who died when Oda Nobunaga was killed by Akechi Mitsuhide at Honnoji. (Incident at Honnoji)

Naoyasu served Toyotomi Hideyoshi. Naoyasu took part in capturing Iwatsuki Castle and Oshi Castle at Musashi Province in the expedition to Odawara , and was given 20,000 koku. After that, Based in Imajyo, Echizen Province, he supported Kobayakawa Hideaki and Horio Yoshiharu.

In 1600 at the Battle of Sekigahara, he was under Otani Yoshitsugu , who took part in Ishida Mitsunari's force. However, taking advantage of Kobayakawa Hideaki's betrayal, he betrayed with Wakisaka Yasuharu, Kutsuki Mototsuna and Ogawa Suketada. They defeated Yoshitsugu's force.

After the battle, Tokugawa Ieyasu didn't give Naoyasu credit and seized his domain. Because of that, becaming a retainer of Maeda Toshinaga, he was given 7,000 koku.

In 1606, seeing over flooded Daimon-gawa at Etchu Province, he falled off a horse and died by drowning.

His son, Akaza Takaharu (赤座 孝治), changed his family name to Nagahara (永原). Nagahara clan have cotinued until Meiji Period as a retainer of Kaga clan (加賀藩; -han).