shogun

The English term "shogun" is a direct borrowing from the Japanese word 将軍 (shōgun), meaning "general" or "army commander." In Japanese, it is a compound of 将 (shō, "commander") and 軍 (gun, "army"), a formation that entered Japanese from Middle Chinese. The title was used for military dictators who ruled Japan from the 12th to the 19th century, wielding de facto power while the emperor remained the ceremonial sovereign. English adopted the word in the early 17th century through contact with Portuguese traders and missionaries, who were the first Europeans to document the Japanese political structure, cementing its meaning as the supreme military ruler of feudal Japan.

The word is a direct loanword from Japanese, where it is written as 将軍 (shōgun). It is composed of the elements 将 (shō, meaning "commander", "general", or "leader") and 軍 (gun, meaning "army" or "troops"). In the context of the English loanword, it is treated as an unsegmentable simplex.