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invaded from
Shinano Province. Unable to fight a war on two fronts, Kagekatsu quickly made a separate peace with the Takeda; however, the Hojo were able to lay siege to many of the border castles in the Uonuma region, including Sakado. The defenders were fortunate in that the Hōjō laid siege after the rice harvest had been competed. Furthermore, as the Uonuma area is a region of Japan with the heaviest snowfalls, the Hōjō armies suffered greatly once winter began, and as the snow began to disrupt their supply lines, they were forced to retreat. Kagekatsu was thus able to counterattack and reestablish the link between Kasugayama Castle and his main power base at Sakado. The following spring, in March 1579, Kagekatsu made a major offensive against Kagetora, taking his headquarters at Ōtate Castle. Kagetora fled to
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with a diameter of approximately 20 meters was created near the highest point of the mountain. The area was later fortified with stone walls. The ridge of Mount Sakado has a second peak towards the southeast with a height almost as high as the inner bailey. This peak was also flatted off to form a
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and the Ueda-Nagao rallied to his banner. However, Kagetora had the support of the most important retainers as well as backing by the Takeda and Hōjō clans, and isolated
Kasugayama Castle from the Uonuma basin. In the summer of 1578, the Hōjō invaded Echigo in support of Kagetora while the Takeda
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bailey with a large watchtower. The two sectors were connected by a narrow pathway approximately 100 meters long on the top of the ridge. As the slopes of Mount Sakado are very steep, and with sheer cliffs in place, the area formed a natural notification without need of many
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The castle is now only ruins, with stone wall remains at the site of the residence at the foot of the mountain, a stone wall and a turret foundation at the actual castle on the summit, and the remains of earthworks and moats. The area is now a park with hiking courses and a
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on the site of the former inner bailey. At the foot of the mountain is the Nagao
Masakage Cemetery and a monument proclaiming the area to be the birthplace of Uesugi Kagekatsu and Naoe Kanetsugu. The site is about five minutes by car or 30 minutes on foot from
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initially opposed
Kenshin and raised an army. He was defeated, but was allowed to pledge fealty to Kenshin, and was married to Kenshin's younger sister, Sento-in, after which the Ueda-Nagao clan contributed to Kenshin's campaigns against the
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Sakado Castle is located on Mount Sakado, a 634-meter peak on a ridge to the east of central
Minamiounuma. The area is a long and narrow river basin along the Uono River, a major tributary of the
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of the province, the Fuchū-Nagao clan has the highest position, and the other branches were its retainers. A castle was built at Sakado by the Ueda-Nagano clan sometime in the late 14th century.
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Uesugi
Kagekatsu was thus master of Echigo and undisputed head of the Uesugi clan, but the conflict had left the Uesugi clan greatly weakened, and he was forced to submit fealty to
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as castellan of Sakado Castle. Naoyori made many modifications to the castle and the hillside residence. In 1608, he was transfer to become
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of Echigo
Province. However, the Uesugi preferred to remain new the centre of political power and assigned the province to the
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to rule as deputy governors. However, the Nagao clan was split into three houses: The Fuchū-Nagao clan based at what is now
441:. In 1564, Masakage died in what may have been an accident, and his son, Akikage was adopted by Kenshin, becoming
472:. Sakado Castle continued to be used as a border fortification for Echigo. In 1598, the clan was transferred to
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Sakado Castle, as was common with mountain-top fortifications of the time, consisted of many narrow terraces (
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of the Fuchū-Nagao cadet branch of the clan overthrew his Uesugi overlords. On his death in 1543, his son
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was unable to hold the clan together, and turned authority over to his brother, Kagetora, later known as
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and the residence of the ruler were located on the western hillside, and were protected by a water moat.
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Kagekatsu was supported by
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385:) spread across several levels on the side of the mountain. A circular
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on the orders of
Hideyoshi and the province was given to
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701:(国指定史跡事典) National Historic Site Encyclopedia
363:and the Ueda-Nagao clan based in what is now
295:of Japan. The ruins have been protected as a
16:Sengoku period yamajiro-style Japanese castle
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359:, the Koshi-Nagao clan based at what is now
673:(in Japanese). Agency for Cultural Affairs
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537:List of Historic Sites of Japan (Niigata)
597:Castles of the Samurai: Power and Beauty
557:. Tokyo: Charles E. Tuttle Co. pp.
367:. As Jōetsu was the site of the ancient
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618:. Osprey Publishing. p. 64 pages.
699:Isomura, Yukio; Sakai, Hideya (2012).
599:. Tokyo: Kodansha. p. 112 pages.
580:. Tokyo: Kodansha. p. 200 pages.
648:Niigata Prefecture official home page
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453:also claimed the position of heir.
449:, as Kenshin's other adopted son,
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502:and Sakado Castle was abandoned.
428:. However, the Ueda-Nagao under
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549:Schmorleitz, Morton S. (1974).
241:National Historic Site of Japan
595:Mitchelhill, Jennifer (2004).
89:Show map of Niigata Prefecture
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754:1400s establishments in Japan
734:Castles in Niigata Prefecture
283:neighborhood of the city of
640:Minamiuonuma city home page
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616:Japanese Castles 1540-1640
614:Turnbull, Stephen (2003).
327:still utilise this route.
150:37.0590694°N 138.8983917°E
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671:Cultural Heritage Online
764:Historic Sites of Japan
744:Ruined castles in Japan
155:37.0590694; 138.8983917
576:Motoo, Hinago (1986).
297:National Historic Site
311:, near the border of
57:Site of Sakado Castle
408:Muromachi shogunate
321:Kan-Etsu Expressway
146: /
518:Muikamachi Station
500:Tokugawa shogunate
480:. Hideharu placed
470:Toyotomi Hideyoshi
369:provincial capital
289:Niigata Prefecture
40:Niigata Prefecture
458:Kasugayama Castle
439:Odawara Hōjō clan
330:During the early
325:Jōetsu Shinkansen
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119:Show map of Japan
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653:==References==
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138:37°03′32.65″N
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113:Sakado Castle
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83:Sakado Castle
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749:Minamiuonuma
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675:. Retrieved
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482:Hori Naoyori
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413:Kantō Kanrei
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387:inner bailey
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317:Kantō region
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299:since 1979.
285:Minamiuonuma
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250:
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203:Site history
185:Open to
169:
36:Minamiuonuma
759:Uesugi clan
525:Jōetsu Line
492:Iida Domain
435:Takeda clan
396:castle town
343:Uesugi clan
216:In use
153: /
129:Coordinates
728:Categories
710:4311750404
677:23 October
543:Literature
406:Under the
353:Nagao clan
303:Background
281:Muikamachi
230:Demolished
375:Structure
315:with the
291:, in the
263:Sakado-jō
220:Muromachi
195:Condition
531:See also
437:and the
392:ramparts
323:and the
273:yamajiro
170:yamajiro
703:. 学生社.
559:144–145
522:JR East
520:on the
506:Current
498:by the
402:History
361:Nagaoka
275:-style
172:-style
707:
667:"坂戸城跡"
622:
603:
584:
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487:daimyō
394:. The
382:kuruwa
365:Uonuma
357:Jōetsu
336:Shōgun
268:was a
211:c.1400
348:shugo
208:Built
198:ruins
44:Japan
705:ISBN
679:2018
620:ISBN
601:ISBN
582:ISBN
563:ISBN
474:Aizu
233:1608
166:Type
494:in
490:of
345:as
257:坂戸城
190:yes
28:坂戸城
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