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Kasugayama Castle
is a Sengoku period ''yamashiro''-style Japanese castle located in the Nakayashiki neighborhood of the city of Jōetsu, Niigata prefecture. It was the primary fortress of the warlord Uesugi Kenshin, and was originally built and ruled by the Nagao clan. It is listed as one of Japan's Top 100 Castles and the ruins have been protected as a National Historic Site since 1935. The castle and its history were mentioned by Takizawa Bakin, and Yamazaki Yoshishige in ''Tanki manroku''. Kasugayama Castle is regarded as among Japan's Five Greatest Mountain Castles, along with Nanao Castle, Odani Castle, Kannonji Castle and Gassantoda Castle. The castle is unofficially called . Background Kasugayama Castle extended over two ridges on the summit of 180-meter Mount Kasuga. The castle had no stone walls but consisted of many enclosures (''kuruwa'') with earthen or clay ramparts and dry moats built on terraces at various levels on the mountain. The core of the castle (or inner bailey) was just b ...
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Jōetsu, Niigata
is a city located in Niigata Prefecture, Japan. , the city had an estimated population of 189,430, in 76,461 households with a population density of 190 persons per km2. The total area of the city was . Jōetsu borders the Sea of Japan and is renowned for its abundance of snow, the annual cherry-blossom festival, ''sake'' and ''Koshihikari'' rice. Geography Jōetsu is in southwest Niigata Prefecture, bordered by the Sea of Japan to the north and Nagano Prefecture to the south. It is approximately 133 kilometers west of the city of Niigata, the prefectural capital and 139 kilometers east of Toyama. Mountains Surrounded by the Japanese Alps, Jōetsu contains four noteworthy mountains: *Kasugayama - formerly the location of Kasugayama Castle, home of the Sengoku period ''daimyō'', Uesugi Kenshin *Kanayasan - birthplace of skiing in Japan *Yoneyama - a sacred mountain on the border of Joetsu and neighboring Kashiwazaki City. *Hishigatake-yama - part of the Shin-etsu tr ...
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Gassantoda Castle
Gassantoda Castle (月山富田城, ''Gassantoda-jō'') was a Japanese castle located in Yasugi, Shimane Prefecture. History It is believed the castle was built in the Heian period but this is unclear. Later the castle served as the seat of the powerful Amago clan. It was a mountain castle (''yamashiro'') regarded as the most impregnable castle in all of Japan, and for the next two centuries was considered the most important castle in the San'in region. Gassantoda Castle was besieged by the Ōuchi clan and Mōri clan in the Siege of Toda Castle, but the Amago managed to repel them. In 1566, after several failed assaults and a prolonged siege, the castle fell to Mōri Motonari, ending the Amago clan as a force in the region. This victory confirmed Motonari's rise to the position of most powerful warlord in Western Japan, and the castle would become one of several castles in the region occupied by the Mōri. In 1600, ownership of the castle was passed to Horio Tadauji for supportin ...
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Toyotomi Hideyoshi
, otherwise known as and , was a Japanese samurai and ''daimyō'' (feudal lord) of the late Sengoku period regarded as the second "Great Unifier" of Japan.Richard Holmes, The World Atlas of Warfare: Military Innovations that Changed the Course of History, Viking Press 1988. p. 68. Hideyoshi rose from a peasant background as a Affinity (medieval), retainer of the prominent lord Oda Nobunaga to become one of the most powerful men in Japan. Hideyoshi succeeded Nobunaga after the Honnō-ji Incident in 1582 and continued Nobunaga's campaign to unite Japan that led to the closing of the Sengoku period. Hideyoshi became the ''de facto'' leader of Japan and acquired the prestigious positions of Daijō-daijin, Chancellor of the Realm and Sesshō and Kampaku, Imperial Regent by the mid-1580s. Hideyoshi launched the Japanese invasions of Korea (1592–1598), Japanese invasions of Korea in 1592 to initial success, but eventual military stalemate damaged his prestige before his death in 1 ...
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Later Hōjō Clan
The was one of the most powerful samurai families in Japan in the Sengoku period and held domains primarily in the Kantō region. Their last name was simply Hōjō (北条) but in order to differentiate between the earlier Hōjō clan with the same name and '' mon'' were called "Later Hōjō", although this was not the official family name. History The history of the family is written in the ''Hōjō Godaiki''. The clan is traditionally reckoned to be started by Ise Shinkurō, who came from a branch of the prestigious Ise clan, descendants of Taira no Toshitsugu, a family in the direct service of the Ashikaga shoguns, as close advisors and ''Shugo'' (Governor) of Yamashiro Province (Ise Sadamichi since 1493). During the Imagawa clan succession crisis in 1476, Shinkurō whose sister was married to Imagawa Yoshitada, Shugo (Governor) of Suruga Province, became associated with the Imagawa clan. At the death of Yoshitada in battle, Shinkurō went down to Suruga Province to suppo ...
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Oda Nobunaga
was a Japanese ''daimyō'' and one of the leading figures of the Sengoku period. He is regarded as the first "Great Unifier" of Japan. Nobunaga was head of the very powerful Oda clan, and launched a war against other ''daimyō'' to unify Japan in the 1560s. Nobunaga emerged as the most powerful ''daimyō'', overthrowing the nominally ruling shogun Ashikaga Yoshiaki and dissolving the Ashikaga Shogunate in 1573. He conquered most of Honshu island by 1580, and defeated the ''Ikkō-ikki'' rebels in the 1580s. Nobunaga's rule was noted for innovative military tactics, fostering of free trade, reforms of Japan's civil government, and the start of the Momoyama historical art period, but also for the brutal suppression of those who refused to cooperate or yield to his demands. Nobunaga was killed in the Honnō-ji Incident in 1582, when his retainer Akechi Mitsuhide ambushed him in Kyoto and forced him to commit . Nobunaga was succeeded by Toyotomi Hideyoshi, who along with Toku ...
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Battles Of Kawanakajima
The were a series of battles fought in the Sengoku period of Japan between Takeda Shingen of Kai Province and Uesugi Kenshin of Echigo Province from 1553 to 1564. Shingen and Kenshin contested each other for control of the plain of Kawanakajima between the Sai River (Gifu), Sai River and Chikuma River in northern Shinano Province, located in the present-day city of Nagano, Nagano, Nagano. The battles were triggered after Shingen conquered Shinano, expelling Ogasawara Nagatoki and Murakami Yoshikiyo, who subsequently turned to Kenshin for help. Five major battles of Kawanakajima occurred: Fuse in 1553, Saigawa in 1555, Uenohara in 1557, Hachimanbara in 1561, and Shiozaki in 1564. The most famous and severe battle was fought on 18 October 1561 in the heart of the Kawanakajima plain, thus being known the Battle of Kawanakajima. The battles were ultimately inconclusive and neither Shingen or Kenshin established their control over the plain of Kawanakajima. The Battles of Kawanaka ...
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Takeda Shingen
, of Kai Province, was a pre-eminent ''daimyō'' in feudal Japan. Known as the "Tiger of Kai", he was one of the most powerful daimyō with exceptional military prestige in the late stage of the Sengoku period. Shingen was a warlord of great skill and military leadership. Name Shingen was called "Tarō" (a commonly used pet name for the eldest son of a Japanese family) or Katsuchiyo (勝千代) during his childhood. When he celebrated his coming of age, he was given the formal name Harunobu (晴信), which included a character from the name of Ashikaga Yoshiharu (足利義晴), the 12th Ashikaga ''shōgun''. It was a common practice in feudal Japan for a higher-ranked warrior to bestow a character from his own name to his inferiors as a symbol of recognition. From the local lord's perspective, it was an honour to receive a character from the shogunate, although the authority of the latter had greatly degenerated in the mid-16th century. Both the Ashikaga and the Takeda cl ...
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Nagao Kagetora
, later known as was a Japanese ''daimyō''. He was born in Nagao clan, and after adoption into the Uesugi clan, ruled Echigo Province in the Sengoku period of Japan. He was one of the most powerful ''daimyō'' of the Sengoku period. Known as the "Dragon of Echigo", while chiefly remembered for his prowess on the battlefield as a military genius, Kenshin is also regarded as an extremely skillful administrator who fostered the growth of local industries and trade and his rule saw a marked rise in the standard of living of Echigo. Kenshin is famed for his honourable conduct, his military expertise, a long-standing rivalry with Takeda Shingen, his numerous defensive campaigns to restore order in the Kantō region as the '' Kanto Kanrei'', and his belief in the Buddhist god of war— Bishamonten. Many of his followers and others believed him to be the Avatar of Bishamonten, and called Kenshin the "God of War". Name His original name was Nagao Kagetora (長尾景虎). He chan ...
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Nagao Harukage
was Uesugi Kenshin's older brother, and successor to his father Nagao Tamekage was a retainer of Japanese feudal lord Uesugi Fusayoshi, and a ''daimyō'' in his own right, during Japan's Sengoku period. He is perhaps best known as the biological father of Nagao Kagetora, who would be adopted into the Uesugi clan as Ues ... in 1536. It would seem that Harukage hadn't proven the most effective or inspiring leader (probably due to ill health), and his failure to exert control and gain support of the powerful ''kokujin'' families had resulted in a situation which was nearly to the point of tearing the province apart. As the story is told, at first Kenshin was reluctant to take the field against his own brother, but was eventually convinced that it was necessary to the survival of Echigo. Kenshin succeeded in wresting control of the clan from Harukage in 1548. Harukage stepped down from the lead of the clan and provincial government, and gave the titles to his younger bro ...
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Uesugi Kagetora
was the seventh son of Hōjō Ujiyasu; known as Hōjō Saburō, he was adopted by Uesugi Kenshin, and was meant to be Kenshin's heir. However, in 1578, he was attacked in his castle at Otate by Uesugi Kagekatsu—Kagetora's respective brother-in-law—and was subsequently defeated. Kagetora committed suicide the following year in the Samegao Castle. Biography Uesugi Kagetora was born in either 1552 or 1554, and during his lifetime was also known as Hōjō Ujihide (北条氏秀), Hōjō Saburō (北条三郎), Saburō Kagetora (三郎景虎). He was the seventh son (sixth to survive to adulthood) of Hōjō Ujiyasu, younger brother of Hōjō Ujimasa, Hōjō Ujiteru, Hōjō Ujikuni, Hōjō Ujinori, Hōjō Ujitada, and older brother of Hōjō Ujimitsu. His mother was the sister-in-law of Toyama Yasumitsu, a vassal of the Hōjō clan (other sources say Suikeiin, Ujiyasu's principle wife). It's likely that he and Hōjō Ujihide were two different people and that Ujihide was the s ...
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Naoe Kagetsuna
(1509–1577) was an officer under the Uesugi clan in historic Japan.Kawanakajima 1553–64: Samurai power struggle
Turnball, S. 2013.
Kagetsuna served as a very close confidant to . In both domestic and external affairs, Kagetsuna left his mark on Kenshin's regime. Kagetsuna was entrusted with distribution and defense of the supplies and reinforcements to the battlefield, during the expedition to the Kantō region. He fought alongside th ...
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Kakizaki Kageie
was a Japanese samurai of the Sengoku period, who served the Uesugi clan of Echigo Province. He was one of the most important and well known generals of Uesugi Kenshin. He earned a reputation for being extremely ferocious warrior like Kato Kiyomasa, etc. He fought at the 3rd battle of the Battles of Kawanakajima against the Takeda clan and led the vanguard force for the Uesugi at the 4th battle. Kenshin suspected Kageie of treason and ordered his death, by seppuku. A smoldering revenge that he would harbor for the rest of his life. References Further reading

*Murooka, Hiroshi (1969). ''Kakizaki Kageie''. Tokyo: Tokyo Nihon Jōkaku shiryōkan. Samurai 1575 deaths Uesugi retainers Year of birth uncertain {{Samurai-stub ...
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