Lifespan: Tenbun 3 (1534) to 10/19 of Keichō 14 (1609)
Other Names: Hikogorō (childhood)
Title: Junior Fifth Rank (Lower), Governor of Hyūga
Lord: Tokugawa Ieyasu
Father: Ishikawa Kiyokane
Mother: Myōshun-ni (daughter of Mizuno Tadamasa and older sister of Odai-no-kata)
Siblings: Yasumasa (Yasuamasa), Kazumasa, Ienari, sister (wife of Sakai Masachika)
Wife: [Formal] Daughter of Matsudaira Kiyoyoshi
Children: Yasumichi, Naritsugu, daughter (formal wife of Ōkubo Tadachika), daughter (formal wife of Honda Yasushige)
Adopted Children: Tadafusa, Naritaka
Ishikawa Ienari served as a bushō from the Sengoku to early Edo periods. He was a retainer of the Tokugawa clan. Ienari served as the second lord of the Mino-Ōgaki domain. He was a cousin of Tokugawa Ieyasu on the side of his mother and the uncle of Ishikawa Kazumasa. He served as the second head of the Ishikawa family in the Ise-Kameyama domain. He is counted among the Sixteen Generals of the Tokugawa.
In 1534, Ienari was born as the third son of Ishikawa Kiyokane in Nishio in Mikawa Province. Kiyokane was a retainer of the Matsudaira clan of Mikawa. Ienari’s mother, Odai-no-kata, was the younger sister of the natural mother of Tokugawa Ieyasu. From around the time that Ieyasu was a hostage of Imagawa Yoshimoto (the sengoku daimyō of Suruga Province), Ienari served as a hereditary retainer. In 1558, he served in the vanguard forces during an attack in Terabe.
Ienari served on behalf of the Tokugawa in many contests including, in 1560, the siege of the Marune fortress; in 1561, the siege of 鳥羽根 Castle; in 1563, the battle to subdue the Mikawa Ikkō-ikki; and, in 1570, the Battle of Anegawa. As the hatagashira, or head of the band of bushi in the western portion of Mikawa Province, he contributed in the early days of Ieyasu rise to dominance. Sakai Tadatsugu served as the hatagashira for eastern Mikawa. Ienari was an ardent follower of the Ikkō sect, but during the Mikawa Ikkō-ikki, he joined his father, Kiyokane, to convert to another sect as a display of his loyalty to Ieyasu.
In 1569, after the fall of Imagawa Ujizane, Ienari was appointed to serve as the lord of Kakegawa Castle in Tōtōmi Province. That same year, he transferred the role as the head of the band of bushi in the western portion of Mikawa to his nephew, Ishikawa Kazumasa.
In 1580, Ienari transferred the headship of the clan to his eldest son, Ishikawa Yasumichi, and retired. In 1590, after the demise of the Gohōjō clan, he was transferred to the Kantō by Tokugawa Ieyasu and granted a retirement income of 5,000 koku in Umenawa in Izu Province.
In 1607, Yasumichi, the first lord of the Mino-Ōgaki domain, preceded his father in death so the headship of the clan reverted to Ienari and he became the second lord of the domain. However, after having once retired, or perhaps owing to his advanced age, he did not participate in the administrative affairs of the bakufu. On 10/19 of Keichō 14 (1609), he died at the age of seventy-six. Ienari was succeeded by Ishikawa Tadafusa, a grandchild from a daughter married into another family whom he adopted.
Ienari was known as a loyal retainer who was second-to-none and was deeply trusted. After his death, in the absence of an heir his family would have ordinarily come to an end but was permitted to continue on account of the respect toward him.