Emperor Go-Daigo in the context of "Nanboku-chō period"

The Kamakura shogunate (Japanese: 鎌倉幕府, Hepburn: Kamakura bakufu) was the feudal military government of Japan during the Kamakura period from 1185 to 1333.

The Kamakura shogunate was established by Minamoto no Yoritomo after victory in the Genpei War and appointing himself as shōgun. Yoritomo governed Japan as military dictator from the eastern city of Kamakura with the emperor of Japan and his Imperial Court in the official capital city of Heian-kyō (Kyoto) as figureheads. The Kamakura shōguns were members of the Minamoto clan until 1226, the Fujiwara clan until 1252, and the last six were minor princes of the imperial family. The Hōjō clan were the de facto rulers of Japan as shikken (regent) of the shōgun from 1203. The Kamakura shogunate saw the Jōkyū War in 1221 and the Mongol invasions of Japan under Kublai Khan in 1274 and 1281. The Kamakura shogunate was overthrown in the Kenmu Restoration under Emperor Go-Daigo in 1333, re-establishing Imperial rule until Ashikaga Takauji and his offspring overthrew the imperial government and founded the Ashikaga shogunate in 1336 (Nanboku-chō period).

The Ashikaga shogunate (足利幕府, Ashikaga bakufu), also known as the Muromachi shogunate (室町幕府, Muromachi bakufu), was the feudal military government of Japan during the Muromachi period from 1336 to 1573.

The Ashikaga shogunate was established when Ashikaga Takauji was appointed Shōgun after overthrowing the Kenmu Restoration shortly after it had overthrown the Kamakura shogunate in support of Emperor Go-Daigo. The Ashikaga clan governed Japan from the Imperial capital of Heian-kyō (Kyoto) as de facto military dictators along with the daimyō lords of the samurai class. The Ashikaga shogunate began the Nanboku-chō period between the Pro-Ashikaga Northern Court in Kyoto and the Pro-Go-Daigo Southern Court in Yoshino until the South conceded to the North in 1392. The Ashikaga shogunate collapsed upon outbreak of the Ōnin War in 1467, entering a state of constant civil war known as the Sengoku period, and was finally dissolved when Shōgun Ashikaga Yoshiaki was overthrown by Oda Nobunaga in 1573.

The Kenmu Restoration (Japanese: 建武の新政, Hepburn: Kenmu no shinsei) was a three-year period of Imperial rule in Japanese history between the Kamakura period and the Muromachi period from 1333 to 1336. The Kenmu Restoration was an effort made by Emperor Go-Daigo to overthrow the ruling Kamakura Shogunate (de facto ruled by Hōjō clan) and restore the Imperial House to power in Japan, returning to civilian government after 148 years of de facto military government from Kamakura. Go-Daigo launched the Genkō War in 1331 against the Kamakura Shogunate but was defeated and forced to exile to the Oki Islands. Go-Daigo launched a second uprising, and with the assistance of the defected Kamakura general Ashikaga Takauji and rebel leader Nitta Yoshisada, defeated the Kamakura Shogunate at the siege of Kamakura in 1333. The Imperial House was restored to power but Go-Daigo's policies failed to satisfy his major samurai supporters and most Japanese people. The Kenmu Restoration was ultimately overthrown when Takauji became Shōgun and founded the Ashikaga Shogunate in 1336, beginning the "Northern and Southern Courts" period and the Muromachi period.

The Kenmu Restoration was the last time the Emperor of Japan held significant power until the Meiji Restoration in 1868.

The Southern Court (南朝, Nanchō) were a set of four emperors (Emperor Go-Daigo and his line) whose claims to sovereignty during the Nanboku-chō period spanning from 1336 through 1392 were usurped by the Northern Court. This period ended with the Southern Court definitively losing the war, and they were forced to completely submit sovereignty to the Northern Court. This had the result that, while later Japanese sovereigns were descended from the Northern Court, posterity assigns sole legitimacy during this period to the Southern Court.

The Southern descendants are also known as the "junior line" and the Daikakuji line (大覚寺統, Daikakuji-tō), Daikaku-ji being the cloistered home of Go-Uda, a Southern ruler. Because it was based in Yoshino, Nara, it is also called the Yoshino court (吉野朝廷, Yoshino chōtei).

The Genkō War (元弘の乱, Genkō no Ran), also known as the Genkō Incident (元弘の變, Genkō no Hen), was a civil war fought in Japan between the Emperor Go-Daigo and the Kamakura Shogunate from 1331 to 1333. The Genkō War was named after Genkō, the Japanese era corresponding to the period of 1331 to 1334 when the war occurred.

Nitta Yoshisada (新田 義貞; Japanese pronunciation: [ɲiꜜt.ta | jo.ɕi̥.saꜜ.da], 1301 – August 17, 1338) also known as Minamoto no Yoshisada was a samurai lord of the Nanboku-chō period Japan. He was the head of the Nitta clan in the early fourteenth century, and supported the Southern Court of Emperor Go-Daigo in the Nanboku-chō period. He famously marched on Kamakura, besieging and capturing it from the Hōjō clan in 1333.

Later, he fought the Ashikaga brothers on the Emperor's behalf in a see-saw campaign which saw the capital change hands several times. After a peaceful compromise was agreed, Yoshisada was entrusted with two royal princes. At the siege of Kanegasaki (1337), both princes were killed, along with Yoshisada's son, although Yoshisada was able to escape. He committed seppuku when his horse was killed at the siege of Kuromaru.

The 1333 siege of Kamakura was a battle of the Genkō War, and marked the end of the power of the Hōjō clan, which had dominated the regency of the Kamakura shogunate for over a century. Forces loyal to Emperor Go-Daigo and led by Nitta Yoshisada entered the city from multiple directions and destroyed it; in the end, the Hōjō leaders retreated to Tōshō-ji, the Hōjō family temple, where they committed suicide with the rest of the clan.