Ogasawara Narisuke served as a bushō during the Azuchi-Momoyama period.  He took the name of Nagato-no-kami.  Narisuke served as the head of the Awa-Ogasawara clan.  Owing to his residence at Ichinomiya Castle, he was also referred to as Ichinomiya Narisuke.  He was married to the younger sister of Miyoshi Nagayoshi and a daughter of Noguchi Fuyunaga.

Kume Yoshihiro, the lord of Shibahara Castle in Awa, was married to the younger sister of Hosokawa Mochitaka, the head of the Awa-Hosokawa clan and military governor of Awa and Sanuki Provinces.  Meanwhile, his daughter was the wife of Miyoshi Jikkyū, the younger brother of Nagayoshi.  Once a dispute arose between Mochitaka and Jikkyū, Yoshihiro sided with Mochitaka.  Seeking to capture Narisuke’s wife as a hostage, in 1553, Yoshihiro launched a nighttime assault against Ichinomiya Castle.  During this attack, Narisuke escaped with the help of a retainer named Kimura Higo-no-kami, but the attacking forces broke down the gate, captured the castle, and achieved their objective by taking Narisuke’s wife and daughter hostage. 

Narisuke participated in many battles as a member of the Miyoshi clan including, in 1562, at the Battle of Kumeda.  The commanding general, Miyoshi Jikkyū, was killed in action and the Miyoshi were defeated, but, in residual clashes during the retreat, Narisuke skillfully commanded his troops to enable their escape.  After the death of Nagayoshi, the authority of the Miyoshi clan waned and, around the time that Miyoshi Nagaharu became the head of the clan, Narisuke switched his allegiance to the Chōsokabe clan.  From 1577 to 1580, Narisuke (with the support of the Chōsokabe clan) engaged in a prolonged conflict with Sogō Masayasu for control of Shōzui Castle.

Thereafter, Narisuke joined the battles of the Chōsokabe clan aimed at unifying Shikoku.  On 9/3 of Tenshō 10 (1582), however, Narisuke colluded with Miyoshi Yasunaga and betrayed the Chōsokabe in favor of the Oda clan.  After the Battle of Nakatomigawa, he surrendered again to the Chōsokabe, but, in the eleventh month, was remonstrated by Chōsokabe Motochika and ordered to commit seppuku.

After the death of Narisuke, his younger brother, Ogasawara Naritaka (also known as Mitsutaka), fled to Sanuki Province and, in the era of his son, Mitsunobu, served the Hachisuka clan.  The bloodline continues with the priests of the Ichinomiya Shrine.

Anecdotes

There is a legend that, owing to the mortification he felt at being compelled to kill himself, he reappeared as a ghost becoming a model of a monstrous apparition known as yagyō-san.