The Fujiwara no Hirotsugu Rebellion is sparsely documented and most of what is known about it, including exact dates, derives from a single historical source, the Shoku Nihongi.
[8] While most victims were from the producer populace of western and central Japan, by 737, the epidemic reached the capital at Heijō-kyō (Nara) causing death and terror among the aristocracy.
[7][18] Makibi who had brought several important Confucian texts to Japan would advise the Emperor on the latest continental developments in legal codes, warfare and music.
In 736, 2nd month (March/April), the monk Genbō who had returned with more than 5000 Buddhist scrolls and commentaries was given a large plot of land, eight servants and a purple kesa by the court.
[nb 3] Consequently, his influence at court increased and in 737, 8th month (August/September) Genbō became chief priest of Kōfuku-ji, head of the northern branch of the Hossō sect of Buddhism, and he gained the highest monastic rank sōjō (primary prelate).
[13][27] Hermann Bohner describes him as a "knight", very talented in warfare, dance, music, poetry and science, but also as daredevil who is looking for enemies to attack and for risks to take.
[28] However Shōmu confided in his most influential advisors and had Hirotsugu demoted from his position as governor of the central Yamato Province, which he had assumed a year earlier, to remote Kyushu where he became vice-governor of Dazaifu in 738.
[9][12][25][27][29][30][31] In a memorial sent to the Emperor in September 740,[d 2] Hirotsugu declared that he held Kibi no Makibi and the priest Genbō responsible for corruption and general discontent at the capital.
Before any battle, in this conflict, a large part of the government troops would be recruited from western Honshu where many good mounted archers were located, giving them a decisive advantage over Hirotsugu who was limited to Kyushu.
[12] A messenger was sent to make offerings at the Ise Grand Shrine and Shōmu ordered that seven-foot-high statues of Kannon bosatsu be cast and sutras copied and read in all provinces.
Along the way, on 19 October,[d 5] Hirotsugu stopped at the headquarters of Oka district to "make camp, set up his crossbows, raise beacon signals, and conscript soldiers from the province [of Chikuzen]".
The government army successfully landed on Kyushu, captured men and weapons from three camps at Tomi, Itabitsu and Miyako in Buzen Province.
[d 6][1] Earlier the court's army had been reinforced on 16/17 October[d 7] with more than 4,000 men including 40 fine soldiers (jōhei) under the magistrate of Toyoura District, Nagato Province.
[1] On 20 October,[d 8] several of Hirotsugu's allies surrendered and changed sides: four district officials defected together with 500 mounted warriors and a citizen from Buzen Province killed one of the rebels.
[10][11][13] In an entry of the Shoku Nihongi, dated April 14, 741,[d 17] it was noted that gifts of land, servants, horses and Buddhist sutras were made to the Hachiman shrine and for the construction of a pagoda.
[29][35] While not directly related to the rebellion, Shōmu's edict of 741, in which he decreed that provincial temples be established, is another indication for the desolate state of the country following a number of calamities.
[22][25][42][43] This story was noted in the Shoku Nihongi as: "Word spread that the spiritual effect of Fujiwara no Hirotsugu had caused him harm", and it is the first mention of a vengeful spirit (goryō) in Japanese history or literature.
[23] Herman Ooms sees in this rumor a "widespread support (probably limited to Nara and environs) for someone who critiqued the government (Hirotsugu) and suffered the consequences".