Rikugun-gensui (陸軍元帥, Field marshal), formal rank designations: Gensui-rikugun-taishō (元帥陸軍大将, Marshal-general) was the highest title in the pre-war Imperial Japanese military.

However, in May 1873 Saigō was "demoted" to general, with gensui thereafter no longer a rank as such, but a largely honorific title awarded for extremely meritorious service to the Emperor - thus similar in concept to the French title of Marshal of France.

While gensui would retain their actual ranks of general or admiral, they were entitled to wear an additional enamelled breast badge, depicting paulownia leaves between crossed army colors and a naval ensign under the Imperial Seal of Japan.

They were also entitled to wear a special samurai sword (katana) of a modern design on ceremonial occasions.

The title was also bestowed on King George V of the United Kingdom on October 29, 1918.