Kusunoki Masashige (楠木 正成, 1294 – July 4, 1336) was a 14th-century samurai who fought for Emperor Go-Daigo in the Genkō War, the attempt to wrest rulership of Japan away from the Kamakura shogunate and is remembered as the ideal of samurai loyalty. His origin has not been validated and it was merely six years between the start of his military campaign in 1331 and his demise in 1336. He received the highest decoration from the Meiji government of Japan in 1880.
"Legend has it that Emperor Go-Daigo had a dream in which he was sheltering under a camphor tree ("kusunoki"), and that this dream led him to the surname of the warrior who would support him."
Kusunoki "was a well-to-do member of the rural gentry" in the Kawachi Province. He claimed descent from Tachibana Moroye, "a great nobleman of the eighth century." Kusunoki was a "scholar and a devout Buddhist".
A brilliant tactician and strategist, Kusunoki's cunning defense of two key Loyalist fortresses at Akasaka, the Siege of Akasaka, and Chihaya, the Siege of Chihaya, helped allow Go-Daigo to briefly return to power.
In 1333, Go-Daigo rewarded Masashige with governorship of Settsu Province and Kawachi Province. Furthermore, he was promoted to Fifth Rank. Later he was appointed to the Records Office and Settlements Board.
However, one of the loyalist generals, Ashikaga Takauji, betrayed Go-Daigo and led an army against Kusunoki and the remaining loyalists. Takauji was able to take Kyoto, but only temporarily before Nitta Yoshisada and Masashige was able to dislodge Takauji, forcing him to flee to the west. By 1336 however, Takauji was a threat to Kyoto again.
Kusunoki suggested to the Emperor that they take refuge on sacred Mount Hiei and allow Takauji to take Kyoto, only to swoop down from the mountain, and with the help of the monks of Mount Hiei, trap Takauji in the city and destroy him.