Minamoto no Yoritomo made his father-in-law Hōjō Tokimasa and his men carry by hand the stones to build it to pray for the safe delivery of his son Yoriie.

He was succeeded by his 17-year-old son and second shogun, Minamoto no Yoriie under the regency of his maternal grandfather Hōjō Tokimasa.

Yoriie did become head of the Minamoto clan and was regularly appointed shogun in 1202 but, by that time, real power had already fallen into the hands of his grandfather Hōjō Tokimasa and of his mother.

After Yoritomo's death, Hōjō Tokimasa, the clan chief of Yoritomo's widow, Hōjō Masako, and former guardian of Yoritomo, claimed the title of regent ( Shikken ) to Yoritomo's son Minamoto no Yoriie, eventually making that claim hereditary to the Hōjō clan.

* Hōjō Tokimasa, r. 1203-1205

In 1179, he married into the Hōjō clan, led by Hōjō Tokimasa.

Before he was born, his father Yoritomo had Hōjō Tokimasa and his men carry stones to build the Dankazura on Wakamiya Ōji to pray for the child's safe delivery.

When Yoriie later himself had an heir, Ichiman, the child was also born at the Hiki mansion from Hiki's daughter Wakasa no Tsubone, a fact which further consolidating an already strong emotional bond From this relationship Hiki gained considerable influence when Yoriie became shogun, raising the hostility of Hōjō Tokimasa, who was instead close to Yoriie's younger brother Senman ( future third shogun Sanetomo ), and was in his turn trying to leverage that relationship for political advantage.

On June 30, 1203 ( Shōji 1, 12th day of the 4th month ) his remaining powers were formally taken from him and assumed by a council of 13 elders headed by his grandfather Hōjō Tokimasa.

On a pretext, Hōjō Tokimasa invited Hiki Yoshikazu to his home and assassinated him.

Yoriie died in Shuzenji, a small town in today's Izu province, assassinated by his uncle Hōjō Tokimasa.

After the death of his father Yoritomo in 1199, Sanetomo's grandfather Hōjō Tokimasa usurped all political and military power of the shogunate, relegating the position and title of Seii Taishogun, or shogun, to a mere figurehead.

In Kyōto, Minamoto no Michichika took power as steward, and in Kamakura, in 1199, upon the death of Minamoto no Yoritomo, Hōjō Tokimasa began to rule as Gokenin.

By the early thirteenth century, a regency had been established for the shogun by Hōjō Tokimasa — a member of the Hōjō clan, a branch of the Taira that had allied itself with the Minamoto in 1180.

was the eldest child of Hōjō Tokimasa by his wife Hōjō no Maki, the first shikken, or regent, of the Kamakura shogunate.

Hōjō Masako was born in 1157, daughter of Hōjō Tokimasa, leader of the influential Hōjō clan of Izu province, and his wife, Hōjō no Maki.

Minamoto no Yoshitsune and Minamoto no Noriyori were forced into priesthood, while Minamoto no Yoritomo, at the age of thirteen, was spared and sent to exile in Izu, the domain of Hōjō Tokimasa.

Hiromoto also helped the Hōjō clan crush enemies as Hatakeyama Shigetada, Hiraga Asamasa and Wada Yoshimori.

Takeda Nobumitsu ( 1162 – 1248 ), helped the Hōjō during the Shokyu War ( 1221 ) and in reward received the governorship of Aki Province.

* Hōjō Masako, wife of Minamoto no Yoritomo ( d. 1225 )

The Minamoto remained the titular shoguns, with the Hōjō holding the real power.

The problem was solved choosing Kujo Yoritsune, a distant relation of the Minamoto, who would be the fourth shogun and figurehead, while Hōjō Yoshitoki would take care of day-to-day business.

For reasons that are unclear, possibly because Ashikaga was the de facto leader of the powerless Minamoto clan, while the Hōjō clan were from the Taira clan the Minamoto had previously defeated, Ashikaga turned against the Kamakura bakufu, and fought on behalf of the Imperial court.

* 1185: Taira is defeated ( Gempei War ) and Minamoto Yoritomo with the support ( backing ) of the Hōjō clan seizes power, becoming the first shogun of Japan, while the emperor ( or " mikado ") becomes a figurehead

As for Yoritomo, the new head of the Minamoto, he was exiled to Hirugashima, an island in Izu province, which at that time was under the rule of the Hōjō clan.

Yoritomo set himself up as the rightful heir of the Minamoto clan, and, with financial backing of the Hōjō, his wife's family, he set up a capital at Kamakura in the east.

Minamoto no Sanetomo ( 源 実朝, September 17, 1192 – February 13, 1219, r. 1203 – 1219 ) was the third shogun of the Kamakura shogunate Sanetomo was the second son of the founder of the Kamakura shogunate Minamoto no Yoritomo, his mother was Hōjō Masako, and his older brother was the second Kamakura shogun Minamoto no Yoriie.

She was the sister of Hōjō Yoshitoki, and was married to Minamoto no Yoritomo, the first shogun of the Kamakura period.

Examples include Taira no Masakado, Taira no Kiyomori, and ( with a further surname expansion ) the Hōjō clan.

Nonetheless, Minamoto no Yoshitsune and Minamoto no Noriyori, Yoritomo's half brothers who had joined Yoritomo drove Yoshinaka out and executed him, and took Kyoto in the name of Yoritomo ( and the Hōjō.

In 1179, Yoritomo married Hōjō Masako, an event of far-reaching consequences for Japan.

A long and bitter fight ensued in which entire clans like the Hatakeyama, the Hiki, and the Wada were wiped out by the Hōjō who wished to get rid of Yoritomo supporters and consolidate their power.

Hōjō Masako, Yoriie's mother and wife of the first shogun Yoritomo, allegedly overheard the conversation.

Hōjō Masako and her family had stood by Yoritomo through it all.

Yoritomo even created new titles, such as shugo and jitō, which Hōjō Tokimasa received approval from Cloistered Emperor Go-Shirakawa in Kyoto.

The Emperor's role had been usurped by the Minamoto and Hōjō families ever since Minamoto no Yoritomo had obtained from the Emperor the title of Shogun in 1192, ruling thereafter from Kamakura.

The Miura clan supported Minamoto no Yoritomo in the foundation of the Kamakura shogunate, but were later annihilated by Hōjō Tokiyori in 1247.

Hōjō Masako, Tokimasa's daughter, was married to Yoritomo.

Hōjō Tsunashige ( 北条 綱成 ), the stepson of Ujiyasu's brother Tamemasa ( 北条 為昌 ) and son-in-law of Ujitsuna, was outnumbered 3, 000 to allegedly 80, 000, and Ujiyasu led a relief force of 8, 000 soldiers.

Bowing to the overwhelming power of the Toyotomi army, the Hōjō accepted defeat, the top Hōjō leaders killed themselves and Ieyasu marched in and took control of their provinces, so ending the clan's reign of over 100 years.

In accounts of that disastrous Hōjō defeat it is recorded that nearly 900 Hōjō samurai, including the last three Regents, committed suicide at their family temple, Tōshō-ji, whose ruins have been found in today's Ōmachi.

This monopoly of power, as well as the lack of a reward of lands after the defeat of Mongol invasion, led to simmering resentment among Hōjō vassals.

However, the family name was reassigned to a supporter of the Hōjō clan, and the Miura continued to rule Miura Peninsula through the Muromachi period until their defeat at Arai Castle in a 1518 attack by Hōjō Sōun.

Following the defeat of the Late Hōjō clan at the Battle of Odawara, Toyotomi Hideyoshi transferred Tokugawa Ieyasu to take control over the Kantō region, including Yokosuka in 1590.

After the defeat of the Hōjō at the Battle of Odawara by Toyotomi Hideyoshi, the area came under the control of Tokugawa Ieyasu, who built a summer palace ( the Nakahara Goten ) in 1596.

After the defeat of the Late Hōjō clan at the hands of Toyotomi Hideyoshi in 1590, Sagami was part of the territory in the Kantō region which came under the rule of Tokugawa Ieyasu.

Takigawa Kazumasu suddenly faced the assault of the Hōjō clan and lost most of his land there, a defeat that cost him his previous prestige in the Oda clan.

However, the family name was reassigned to a supporter of the Hōjō clan, and the Miura continued to rule Miura Peninsula through the Muromachi period until their defeat at Arai Castle in a 1518 attack by Hōjō Sōun.