Lifespan: 1/28 of Tenshō 14 (1586) to 9/3 of Kanei 9 (1632)
Title: Junior Fifth Rank (Lower), Assistant Captain of the Right Division of Imperial Guards, Governor of Tajima, Junior Fourth Rank (Lower), Chamberlain
Han: lord of Bitchū-Ashimori, lord of Kii-Wakayama, lord of Aki-Hiroshima
Lord: Toyotomi Hideyoshi → Toyotomi Hideyori → Tokugawa Ieyasu → Tokugawa Hidetada → Tokugawa Iemitsu
Father: Asano Nagamasa
Mother: Yaya (Chōsei-in – daughter of Asano Nagakatsu)
Siblings: Yoshinaga, Nagaakira, Nagashige, sister (wife of Hori Chikayoshi), sister (wife of Matsudaira Sadatsuna)
Wife: [Formal] Shōsei-in
Children: Nagaharu, Mitsuakira
Asano Nagaakira served as a daimyō and lord of the Bitchū-Ashimori han in the early Edo period. Nagaakira was the second lineal head of the Kii-Wakayama han, succeeding his older brother, Asano Yoshinaga. He was also the first lineal head of the Aki-Hiroshima han and second lineal head of the primary Asano clan.
Nagaakira was born in Sakamoto in the Shiga District of Ōmi Province as the second son of Asano Nagamasa.
In 1594, Nagaakira was awarded a fief of 3,000 koku while serving under Toyotomi Hideyoshi.
In 1600, Nagaakira began to serve Tokugawa Ieyasu after the Battle of Sekigahara, and acted as a servant of Tokugawa Hidetada. In 1610, he was awarded a fief of 24,000 koku in Ashimori in Bitchū Province.
In 1613, his older brother, Yoshinaga, died of illness with no lineal heir, so Nagaakira became his successor and served as lord of the Kii-Wakayama han.
In 1614, Nagaakira participated in the Battle of Kizugawaguchi in the opening stages of the Ōsaka fuyu no jin, or Winter Siege of Ōsaka. In 1615, during the Ōsaka natsu no jin, or Summer Siege of Ōsaka, Nagaakira’s forces killed Ban Naoyuki and others at the Battle of Kashii. In Kii Province, however, Nagaakira was confronted with uprisings including the Kitayama ikki and the Kishū ikki by local bushi and mercenaries. This caused Nagaakira to quickly return to his home province in an effort to quell the uprisings.
In 1619, the bakufu had Fukushima Masanori removed from his position and ordered Nagaakira to move to Hiroshima in Aki Province to govern a fief of 420,000 koku. Nagaakira died in Hiroshima in 1632 and was succeeded by his second son, Asano Mitsuakira.