31 events the sources record for this year, grouped by region.
What happened
China (7)
On the 24th day of the 8th month, Yoritomo camped at Horiguchi inside Sugiyama in Sagami, but Ōba Kagechika pursued again with about 3,000 horsemen, so he fled to a peak behind the mountain. Kagehiro and Ōmi Sanemasa stayed behind to hold them off with arrows; many horses were killed by the hits. When the arrows ran out, Kagehiro took the bridle and led him deep into the mountains. (Azuma Kagami (Mirror of the East) 吾妻鏡 卷1 治承四年8月24日条 (zh_吾妻鏡_卷001.wiki 174행))
On the 13th day of the 9th month, Yoritomo left Awa for Kazusa with about 300 elite horsemen, but the military summons of Kazusa no Suke Hiromasa was late. That day Chiba no Suke Tsunetane wanted to join the Minamoto with his sons and kin; Tanetsugu urged attacking the provincial deputy (mokudai, a Taira partisan) first, and Tsunetane agreed. Tanetsugu and his nephew Narihiro attacked, set fires, and took the mokudai's head. (Azuma Kagami (Mirror of the East) 吾妻鏡 卷1 治承四年9月13日条 (zh_吾妻鏡_卷001.wiki 212행))
On the 19th day of the 9th month, Kazusa no Gonsuke Hiromasa came to the Sumida River with 20,000 horsemen of the province and paid respect to Yoritomo. Yoritomo was angry at his late arrival, but Hiromasa, though outwardly submissive, harbored divided loyalties; judging that Yoritomo's rebuke suited the bearing of a lord, he dropped his intent to harm him and followed him peacefully. (Azuma Kagami (Mirror of the East) 吾妻鏡 卷1 治承四年9月19日条 (zh_吾妻鏡_卷001.wiki 220행))
On the 2nd day of the 10th month, Yoritomo crossed the Ōi and Sumida rivers in the boats of Tokitsune and Hiromasa and headed for Musashi with over 30,000 elite horsemen. Toshima Kiyomoto and Kasai Kiyoshige came out first to pay respect, and Adachi Tōmoto also came to meet him. Kanagawa-ni, the wife of Koyama Masamitsu, brought her youngest son, and Yoritomo personally held his coming-of-age ceremony and named him Koyama Shichirō Munetomo (later Tomomitsu). (Azuma Kagami (Mirror of the East) 吾妻鏡 卷1 治承四年10月2日条 (zh_吾妻鏡_卷001.wiki 238행))
On the 14th day of the 10th month, the Takeda and Yasuda forces reached near Hachida by way of Jinno and Haruta, and unexpectedly met the force of the Suruga provincial deputy Tachibana no Tōshige, who was heading for Kai. The hilltops and rock paths made advance and retreat difficult, but Nobumitsu fought at the front with Kagekiyo and others, beheaded the two sons of Nagata Nyūdō, and captured Tōshige. Tōshige's head was exposed near Ido at Fujino. (Azuma Kagami (Mirror of the East) 吾妻鏡 卷1 治承四年10月14日条 (zh_吾妻鏡_卷001.wiki 260행))
On the 23rd day of the 10th month, Yoritomo arrived at the provincial headquarters of Sagami and for the first time carried out rewards for merit. Hōjō Tokimasa, Takeda Nobuyoshi, Yasuda Yoshisada, Chiba Tsunetane, Miura Yoshizumi, and Kazusa Hiromasa received confirmation of their domains or new rewards, and Yoshizumi became Miura no Suke. Ōba Kagechika, who had surrendered, was placed in Hiromasa's custody. (Azuma Kagami (Mirror of the East) 吾妻鏡 卷1 治承四年10月23日条 (zh_吾妻鏡_卷001.wiki 308행))
On the 9th day of the 4th month, Minamoto no Yorimasa, who had long planned to attack Taira no Kiyomori, secretly visited Prince Mochihito's palace at Sanjō-Takakura with his sons including Nakatsuna, and urged him to call on the Minamoto, including Yoritomo, to attack the Taira. The prince issued an imperial command (ryōji). Minamoto no Yukiie (Mutsu Jūrō Yoshimori), then in the capital, was sent east carrying the command. (Azuma Kagami (Mirror of the East) 吾妻鏡 卷1 治承四年4月9日条 (zh_吾妻鏡_卷001.wiki 45행))
On the 27th day of the 4th month, the prince's command reached Yoritomo at the Hōjō residence in Izu, delivered by Yukiie, an attendant of the Yasu-in. Yoritomo, in plain court dress, first bowed from afar toward Iwashimizu (Otokoyama), then unrolled and read the command. Yukiie decided to set out to inform the Minamoto of Kai and Shinano. (Azuma Kagami (Mirror of the East) 吾妻鏡 卷1 治承四年4月27日条 (zh_吾妻鏡_卷001.wiki 47행))
On the 19th day of the 5th month, rumors spread in the capital that Prince Mochihito had secretly entered Miidera on the 15th and that the monks had set up his palace at Hōrin-in. Minamoto no Yorimasa set fire to his own residence at Konoe-Kawara and led his sons, grandsons, and retainers to the prince. (Azuma Kagami (Mirror of the East) 吾妻鏡 卷1 治承四年5月19日条 (zh_吾妻鏡_卷001.wiki 67행))
At dawn on the 26th day of the 5th month, the prince, his forces at Miidera weakened, set out for Nara to rely on the monks of Nanto. Yorimasa's clan and the monks followed, but Taira no Tomomori and Koremori led 20,000 mounted imperial troops in pursuit and fought near Uji. Yorimasa, Nakatsuna, and Kanetsuna were beheaded, and the prince died at the torii before Komyōzan at the age of thirty. (Azuma Kagami (Mirror of the East) 吾妻鏡 卷1 治承四年5月26日条 (zh_吾妻鏡_卷001.wiki 73행))
On the 4th day of the 8th month, Yoritomo planned to attack first Yamaki Hyōe-no-jō Taira no Kanetaka, a Taira exile in Izu. He sent Kunitomo, a visitor from the capital, to stay several days at Kanetaka's residence and draw a map of the mountains, rivers, and villages. On the day Kunitomo returned with the drawing, Yoritomo unrolled it together with Hōjō Tokimasa. (Azuma Kagami (Mirror of the East) 吾妻鏡 卷1 治承四年8月4日条 (zh_吾妻鏡_卷001.wiki 99행))
On the 17th day of the 8th month, on the day of the Mishima Shrine festival, the four Sasaki brothers (Sadatsuna, Tsunetaka, Moritsuna, and Takatsuna) arrived late because of a flood. At the hour of the Rat, Hōjō Tokimasa had Tsutsumi Nobutō, a guardian of Kanetaka north of Yamaki, attacked first; Tsunetaka's first arrow became the first arrow of the Minamoto campaign against the Taira and killed Nobutō. Arrows were also shot near the Tenman slope in front of Kanetaka's residence, but many of his men were away visiting the Mishima Shrine. Yoritomo handed a naginata to Kagehiro and sent him to Yamaki to bring back Kanetaka's head; Morotsuna and Kagehiro entered the residence, took the head, and set fire to the house. At dawn Yoritomo saw the heads of Kanetaka and his retainers on the veranda. (Azuma Kagami (Mirror of the East) 吾妻鏡 卷1 治承四年8月17日条 (zh_吾妻鏡_卷001.wiki 116행))
On the night of the 23rd day of the 8th month, in the rain, Yoritomo camped at Ishibashiyama in Sagami with about 300 men, including Hōjō Tokimasa and his son, Morinaga, Mitsutoshi, and Sanehira. He hung the imperial command on the banner. Some 3,000 mounted retainers of the Taira, including Ōba Kagechika and Matano Kagehisa, camped near Ishibashiyama, facing him across a valley. (Azuma Kagami (Mirror of the East) 吾妻鏡 卷1 治承四年8月23日条 (zh_吾妻鏡_卷001.wiki 172행))
On the 27th day of the 8th month, Miura no Suke Yoshiaki (aged 89) was beheaded by Kawagoe Shigeyori and Edo Shigenaga. Yoshizumi and the others headed for Awa province, took a boat with Hōjō Tokimasa, Yoshizane and others from Iwaura in Dohi district, and sailed for Bōshū, where they met Miura men on the sea. Kagechika attacked Miura with several thousand horsemen, but Yoshizumi and the others had already crossed the sea, so he withdrew. (Azuma Kagami (Mirror of the East) 吾妻鏡 卷1 治承四年8月27日条 (zh_吾妻鏡_卷001.wiki 180행))
On the 29th day of the 8th month, Yoritomo and Sanehira reached Karishima in Heihoku district, Awa province, in a small boat. Tokimasa and the others bowed to greet him, and the gloom of several days lifted at once. (Azuma Kagami (Mirror of the East) 吾妻鏡 卷1 治承四年8月29日条 (zh_吾妻鏡_卷001.wiki 184행))
On the 6th day of the 10th month, Yoritomo entered Sagami. Hatakeyama Shigetada led the vanguard and Tsunetane the rear, and his following was said to number in the tens of thousands. He quickly took private houses as lodgings. (Azuma Kagami (Mirror of the East) 吾妻鏡 卷1 治承四年10月6日条 (zh_吾妻鏡_卷001.wiki 246행))