The 1545–1546 was part of a failed attempt by the

Uesugi clan The is a Japanese samurai clan which was at its peak one of the most powerful during the Muromachi and Sengoku periods (14th to 17th centuries). Appert, Georges. (1888) ''Ancien Japon,'' p. 79./ref> At its height, the clan had three main branch ...

to regain

Kawagoe Castle is a flatland Japanese castle in the city of Kawagoe, in Japan's Saitama Prefecture. It is the closest castle to Tokyo to be accessible to visitors, as Edo castle is now the Imperial palace, and largely inaccessible. Along with a number of othe ...

from the Later Hōjō clan in the

Sengoku period The was a period in History of Japan, Japanese history of near-constant civil war and social upheaval from 1467 to 1615. The Sengoku period was initiated by the Ōnin War in 1467 which collapsed the Feudalism, feudal system of Japan under the ...

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

. Uesugi Tomosada of the Ogigayatsu branch of the Uesugi clan attacking

Kawagoe castle is a flatland Japanese castle in the city of Kawagoe, in Japan's Saitama Prefecture. It is the closest castle to Tokyo to be accessible to visitors, as Edo castle is now the Imperial palace, and largely inaccessible. Along with a number of othe ...

, he was joined by his more powerful relative

Uesugi Norimasa was a ''daimyō'' of feudal Japan from Yamanouchi branch Uesugi clan and held the post of Kantō Kanrei, the ''shōgun''s deputy in the Kantō region. He was the adoptive father of Uesugi Kenshin, one of the most famous warlords in Japanese his ...

from Yamanouchi branch Uesugi clan, who held the post of Kantō Kanrei, the shōgun's deputy in the

Kantō region The is a geographical area of Honshu, the largest island of Japan. In a common definition, the region includes the Greater Tokyo Area and encompasses seven prefectures: Gunma, Tochigi, Ibaraki, Saitama, Tokyo, Chiba and Kanagawa. Slight ...

Ashikaga Haruuji Ashikaga (足利) may refer to: * Ashikaga clan (足利氏 ''Ashikaga-shi''), a Japanese samurai clan descended from the Minamoto clan; and that formed the basis of the eponymous shogunate ** Ashikaga shogunate (足利幕府 ''Ashikaga bakufu''), ...

, the Kantō kubō in

Koga KOGA is a Dutch bicycle manufacturer based in Heerenveen, Friesland. The company is known for its long time partnership with Japanese frame manufacturer Miyata, producing bicycles and sponsoring racing teams under the brand name Koga Miyata. As ...

, and by a host of anti-Hōjō

daimyō were powerful Japanese magnates, feudal lords who, from the 10th century to the early Meiji era, Meiji period in the middle 19th century, ruled most of Japan from their vast, hereditary land holdings. They were subordinate to the shogun and n ...

from the

Background

The eldest legitimate son of

Uesugi Tomooki was a lord of Edo Castle and enemy of the Hōjō clan, who seized the castle in 1524. He was the son of Uesugi Tomoyoshi, who was among the first to oppose the Hōjō's rise to power. Biography In 1516, Tomooki took part in the siege of Arai ...

of Ōgigayatsu, following his father's death in 1537, though he was still a child, Uesugi Tomosada led an attack on the Later Hōjō clan in the

Tachibana district The term has at least two different meanings, and has been used in several contexts. People * – a clan of ''kuge'' (court nobles) prominent in the Nara and Heian periods (710–1185) * – a clan of ''daimyō'' (feudal lords) prominent in the Mu ...

Musashi province was a province of Japan, which today comprises Tokyo Metropolis, most of Saitama Prefecture and part of Kanagawa Prefecture. It was sometimes called . The province encompassed Kawasaki and Yokohama. Musashi bordered on Kai, Kōzuke, Sagami, S ...

. He established himself in the temple of Kandai-ji, which he fortified as a castle. However,

Hōjō Ujitsuna was the son of Hōjō Sōun, founder of the Go-Hōjō clan. He continued his father's quest to gain control of the Kantō (the central area, today dominated by Tokyo, of Japan's main island). Biography In 1524, Ujitsuna took Edo Castle, whic ...

took

soon afterwards from Tomosada's uncle,

Uesugi Tomonari Uesugi (sometimes written ''Uyesugi'') is a Japanese surname. Notable people with the surname include: People *Uesugi clan, a Japanese samurai clan **Uesugi Akisada, (1454–1510), a samurai of the Uesugi clan **Uesugi Harunori (1751–1822), a Jap ...

. In 1545, Tomosada attempt to regain the

for the Uesugi clan. Tomosada allied itself with

and

of Yamauchi against

Hōjō Ujiyasu was a ''daimyō'' (warlord) and third head of the Odawara Hōjō clan. Known as the "Lion of Sagami", he was revered as a fearsome warrior and a cunning man. He is famous for his strategies of breaking the siege from Takeda Shingen and Uesugi K ...

Battle

Despite an overwhelming attacking force, numbering around 80,000, the 3,000 men in

's garrison, led by

Hōjō Tsunashige or Hōjō Tsunanari also known as "Jio Hachiman", was an officer of great skill under the Hōjō clan. The brother in law of Hōjō Ujiyasu. Around the Kantō region, he fought in many battles supporting the Hōjō, also contributing to the e ...

, held off the siege until the relief force arrived. The relief force, numbering only 8,000, was led by Tsunashige's brother,

. Some warrior was sent by Ujiyasu to sneak past the Uesugi siege lines to inform the garrison of the relief's arrival. Though still strongly outnumbered,

ninja A or was a covert agent or mercenary in feudal Japan. The functions of a ninja included reconnaissance In military operations, reconnaissance or scouting is the exploration of an area by military forces to obtain information about enem ...

spies informed the Hōjō forces that the attackers, Ashikaga Haruuji in particular, had relaxed their vigilance due to their overconfidence in victory. The Hōjō tried a risky tactic, coordinating a night attack between the garrison and the relieving force. Going against battlefield custom, the samurai were ordered to leave behind any heavy armor, which would slow them down and perhaps reveal their position, and to not bother taking the heads of their defeated enemies. This would deny the warriors much honor, as their triumphs would not be known or recorded, but the intense loyalty of the Hōjō samurai caused them to follow these orders. The tactic succeeded, Uesugi Tomosada was killed in battle, and the Hōjō foiled the siege.

Aftermath

This Hōjō victory marked the decisive turning point in the struggle for the

Kanto region Kantō (Japanese) Kanto is a simplified spelling of , a Japanese word, only omitting the diacritics. In Japan Kantō may refer to: *Kantō Plain *Kantō region *Kantō-kai, organized crime group *Kanto (Pokémon), a geographical region in the ' ...

. The Hōjō tactics which said to be "the one of the most notable examples of night fighting in samurai history". This defeat for the

Uesugi Uesugi (sometimes written ''Uyesugi'') is a Japanese surname. Notable people with the surname include: People *Uesugi clan, a Japanese samurai clan **Uesugi Akisada, (1454–1510), a samurai of the Uesugi clan **Uesugi Harunori (1751–1822), a Jap ...

would lead to the near-extinction of the family, and with Tomosada's death, the Ōgigayatsu branch came to an end.

Background

Battle

Aftermath

References

Further reading