Definition
Asano Nagamasa (浅野 長政, 1546 – 1598) was a Japanese samurai and daimyō of the late Sengoku period who served as a senior retainer of Toyotomi Hideyoshi and participated in Hideyoshi’s campaigns, including the invasions of Korea (Imjin War).
Overview
Born in 1546, Asano Nagamasa belonged to the Asano clan, a branch of the prestigious Fujiwara lineage that held lands in the Harima and Settsu provinces. He entered the service of Oda Nobunaga and, after Nobunaga’s death, became a close vassal of Hideyoshi. Under Hideyoshi he held several high‑ranking positions, such as shugo (military governor) of Harima Province and bugyō (magistrate) of the imperial palace.
During the Korean campaigns of 1592–1598, Nagamasa commanded troops in multiple battles and was responsible for logistical and administrative duties within the expeditionary forces. His contributions earned him additional land grants, most notably a kokudaka (assessed rice income) of 30,000 koku in the Himeji region. He died in 1598, shortly before the conclusion of the Korean wars.
Etymology/Origin
The family name “Asano” (浅野) combines the characters 浅 (asa, “shallow”) and 野 (no, “field”). The given name “Nagamasa” (長政) merges 長 (naga, “long” or “eternal”) with 政 (masa, “government” or “rule”). Both elements are typical of samurai naming conventions in the Sengoku era, reflecting aspirations of lasting authority.
Characteristics
- Political Role: Held senior administrative posts within Hideyoshi’s government, including provincial governorships and palace oversight.
- Military Leadership: Served as a commander during the Imjin War, overseeing troop movements, supply lines, and battlefield coordination.
- Landholdings: Controlled a domain measured at approximately 30,000 koku, signifying a mid‑rank daimyō status.
- Family Connections: Ancestor of later Asano daimyō who would govern the Hiroshima Domain; his lineage continued to influence Edo‑period politics.
Related Topics
- Toyotomi Hideyoshi
- Sengoku period (c. 1467–1600)
- Imjin War (Japanese invasions of Korea, 1592–1598)
- Asano clan (including Asano Nagaakira, later daimyō of Hiroshima)
- Daijō-kan (Great Council of State) and other governing institutions of late‑16th‑century Japan
Note: While primary historical records confirm Asano Nagamasa’s existence and his service under Hideyoshi, certain details about specific titles, exact land assessments, and familial relationships vary among sources. The information presented reflects the consensus of available historiography.