What does daimyo mean?
A daimyo was one of Japan's great feudal lords — a magnate who controlled extensive territories, maintained castles, and kept private armies of samurai sworn to his service. The word comes from Japanese and literally means "great name," reflecting the enormous prestige attached to these figures. Daimyo dominated Japanese political life from roughly the 10th century until the Meiji Restoration of 1868, though their power peaked during the Sengoku period (1467–1603), an age of civil war in which rival lords battled for supremacy. The most powerful daimyo, such as Oda Nobunaga and Tokugawa Ieyasu, came close to unifying the entire country. Even after the Tokugawa shogunate imposed peace, some 260 daimyo continued to govern their domains under strict central oversight. The term carries connotations of wealth, martial power, and aristocratic privilege, and it remains essential vocabulary for anyone studying Japanese history, literature, or art.
nounA powerful Japanese feudal lord who ruled large landed estates and commanded armies of samurai, especially from the 10th to the 19th century.
- A powerful Japanese feudal lord who held vast landed estates and commanded samurai retainers, particularly during the medieval and early modern periods (roughly 10th–19th centuries).
"The daimyo of Satsuma amassed such wealth that he could rival the shogun himself."
"Toyotomi Hideyoshi, born a peasant's son, rose to command the loyalty of every daimyo in Japan."
"The museum's exhibit featured armor worn by a 16th-century daimyo during the Sengoku wars."
Both the unchanged form "daimyo" and anglicized "daimyos" are accepted; academic texts often use "daimyo" unchanged following Japanese convention.
"Many daimyo built elaborate castles to display their wealth and defend against rivals."
Japan's daimyo were so fiercely independent that when they finally surrendered their lands in 1869, it ended nearly a thousand years of feudal rule overnight.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of daimyo
"Daimyo" derives from the Japanese word 大名 (daimyō), literally meaning "great name" — a reference to the great landholders whose names carried exceptional weight. The term entered English in the early 18th century through Dutch traders and European accounts of Japan, becoming established as Western knowledge of Japanese society grew. Related terms from the same Japanese milieu include "shogun" and "samurai," both borrowed into English around the same era.
How daimyo is actually used
"Daimyo" is a historical term used mainly in scholarly, educational, or cultural contexts relating to Japanese history. It is always capitalized in some older English texts but is now more commonly written lowercase. The plural "daimyo" or "daimyos" is acceptable; the Japanese-derived plural "daimyō" with a macron appears in academic writing.
Easily confused with daimyo
The shogun was the military ruler of all Japan, while a daimyo was one of many regional lords beneath him.