Lifespan: Unknown to 10/3 of Keichō 3 (1598)
Rank: bushō; daimyō
Title: Junior Fifth Rank (Lower); Director of the Bureau of Military Storehouses
Lord: Oda Nobunaga → Toyotomi Hideyoshi → Toyotomi Hideyori
Father: Inaba Yoshimichi
Mother: Daughter of the Kanō clan
Siblings: Sister (wife of Horiike Han-no-jō), sister (wife of Kunieda Shigemoto), Shigemichi, Sadamichi, Masamichi, Naomasa, Yasu (third wife of Saitō Toshimitsu), sister (wife of Marumo Kanetoshi), sister (wife of Yamamura Yoshikatsu)
Wife: [Formal] Daughter of Yoshida Jōchū
Children: Makimura Toshisada, Michishige, Michitō, daughter (formal wife of Inaba Masanari), Itchū
Adopted Children: Fuku (known as Kasuga-no-tsubone – second wife of Inaba Masanari)
Inaba Shigemichi served as a bushō and daimyō during the Sengoku and Azuchi-Momoyama periods. Shigemichi was the eldest illegitimate son of Inaba Yoshimichi (known as Ittetsu). Shigemichi was an uncle (her father’s older brother) and adoptive father of Kasuga-no-tsubone.
Shigemichi initially served as an umamawari, or member of the mounted cavalry, for Oda Nobunaga. He received compensation of 15,000 (or 23,000) koku. After the unexpected death of Nobunaga in a coup d’état known as the Honno Temple Incident, Shigemichi and Yoshimichi headed out to help those at Iiyama Castle in the Minochi District of northern Shinano Province who were surrounded by an uprising. Thereafter, Shigemichi followed after his father and younger brother by becoming a retainer of Hashiba Hideyoshi and served in his cavalry. In 1584, Shigemichi participated in the Battle of Komaki-Nagakute, and, for his contributions, received a increase to his stipend in Kawachi Province. In the seventh month of 1585, Shigemichi was invested with the title of Junior Fifth Rank (Lower) and Director of the Bureau of Military Storehouses. In the following month, he was given responsibility to govern Hida Province on a temporary basis after the Anegakōji clan was vanquished. In 1587, Shigemichi joined the Kyūshū Pacification.
After the death of Yoshimichi in 1588, Shigemichi was the eldest son but not born to his formal wife, so the family was inherited by Inaba Sadamichi, his younger brother of a different mother. Shigemichi separately received a fief of 12,000 koku in Kiyomizu in Mino Province and became a daimyō.
In 1590, he participated in the Conquest of Odawara. From the beginning of the Bunrok-Keichō Expedition in 1592, Shigemichi was stationed in Nagoya Castle in Hizen Province. In Hideyoshi’s latter years, Shigemichi served as a member of the otogishū, close associates of senior leaders who provided company and support. Shigemichi died on 10/3 of 1598 and was succeeded by his son, Inaba Michishige.