Matsushiro Castle, originally known as Kaizu Castle, is located in what was once Matsushiro town, now part of Nagano City. The site is recognized as a National Historic Site of Japan. Situated on the northern Shinano flatlands between the Chikuma River and a former riverbed that serves as a natural outer moat to the north, the castle and its surrounding town were prone to flooding due to their location.
The castle was designed in a concentric layout, with the Central Bailey (Hon-Maru) at its core, protected by walls and initially featuring a tenshu (main keep) in its northwest corner, which was later replaced by a yagura (turret). A moat surrounded the Central Bailey, which was itself encircled by the Second Bailey (Ni-no-Maru), featuring earthen ramparts and stone fortifications near its gates. The Second Bailey was bordered by a dry moat on its south and east, while the Third Bailey (San-no-Maru) lay beyond. The palace and official residences of the daimyo were located in the Hana-no-Maru enclosure, adjacent to the main defenses.
The castle’s origins date back to 1560, when it was built by Yamamoto Kansuke under the command of Takeda Shingen and named Kaizu Castle. Kosaka Danjo (Kosaka Masanobu), a retainer of the Takeda clan, was its first commander. Takeda Shingen used the castle in his battles against Uesugi Kenshin for control over northern Shinano Province. The castle is located near the site of the famed Battle of Kawanakajima, where the Takeda and Uesugi forces fought several times.
After the fall of the Takeda clan, the castle changed hands, eventually coming under Oda Nobunaga's control. However, following Nobunaga's assassination during the 1582 Honno-ji incident, Uesugi Kagekatsu reclaimed northern Shinano. The castle became a point of contention between the Uesugi and Sanada clans. Under Toyotomi Hideyoshi’s rule, the Uesugi were moved to Aizu, and after Hideyoshi’s death, the Tokugawa shogunate assigned Sanada Nobuyuki to Matsushiro Domain in 1622, relocating him from Ueda.
The castle was renamed Matsushiro Castle in 1711 by Sanada Yukimichi, the third-generation daimyo of the Sanada family. After a fire destroyed the castle in 1717, it was rebuilt the following year with the help of a 10,000 ryo donation from the Tokugawa shogunate. The castle sustained severe damage from a flood in 1742, and reconstruction continued until 1758. In 1770, the palace structures were moved to the Hana-no-Maru enclosure and rebuilt in 1804, but much of the castle was damaged again by an earthquake in 1847. Following another fire in 1853, the palace was rebuilt, and a secondary palace was constructed outside the castle in 1864.
After the Meiji Restoration and the abolition of the han system, most of the remaining structures of Matsushiro Castle were dismantled in 1871. In 1873, the remaining parts were destroyed by a fire, leaving only the stone foundations that remain today.
See also
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Fushimi Castle
Fushimi Castle, also known as Momoyama Castle or Fushimi-Momoyama Castle, is located in Fushimi Ward, Kyoto. Originally built by Toyotomi Hideyoshi between 1592 and 1594 as his retirement residence, the castle was destroyed by the 1596 Keichō–Fushimi earthquake and later rebuilt. However, it was demolished again in 1623, and its site now houses the tomb of Emperor Meiji. A replica of the castle was constructed nearby in 1964.
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Odawara Castle
Odawara Castle, located in the city of Odawara, Kanagawa Prefecture, Japan, is a reconstructed historical site with roots dating back to the Kamakura period (1185–1333). The current donjon (main keep) was rebuilt using reinforced concrete in 1960 on the stone foundation of the original structure, which was dismantled between 1870 and 1872 during the Meiji Restoration.
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Shinpu Castle
Shinpu Castle was a Japanese hirayama-style fortress from the Sengoku period, situated in what is now Nirasaki, Yamanashi Prefecture. It served as the main stronghold of warlord Takeda Katsuyori. Designated as a National Historic Site in 1973, the castle occupies a strategic position on a mountain with steep cliffs, overlooking the Kamanashi River to the west of Kofu, where Takeda Shingen’s Tsutsujigasaki Castle once stood.
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Takato Castle
Takato Castle, located in the city of Ina in southern Nagano Prefecture, Japan, was a notable stronghold during the Sengoku period. By the end of the Edo period, it was the residence of a cadet branch of the Naito clan, the daimyo of the Takato Domain. Also known as Kabuto Castle, it was originally constructed in the 16th century and is now mostly in ruins.
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Takatenjin Castle
Takatenjin Castle was a yamashiro-style fortress from Japan's Sengoku period, situated in the Kamihijikata and Shimohijikata districts of Kakegawa, Shizuoka Prefecture. Designated a National Historic Site in 1975, with an expanded protected area in 2007, its ruins remain a significant historical landmark.
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Yoshida Castle
Yoshida Castle is renowned worldwide, particularly through the intricate woodblock prints by Edo Period artist Hiroshige. His famous series, depicting the 53 stages of the Tokaido—the historic route between Kyoto and Edo (modern-day Tokyo)—includes the 34th print, which shows workmen repairing a castle overlooking a wooden bridge crossing a wide river. This scene captures the Toyokawa River at Toyohashi in southeast Aichi Prefecture, and the castle is Yoshida Castle.
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Yamato Koriyama Castle
The impressive ruins of Koriyama Castle sit atop a small hill, surrounded by two rivers. The strategic positioning and strong layout of the castle served it well through the final years of the Sengoku period and the peaceful days of the Edo period.
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Yamanaka Castle
Yamanaka Castle, established by Hojo Ujiyasu in the 1560s, is located in what is now eastern Mishima, Shizuoka Prefecture. This castle served as the first line of western defense for the main Hojo Castle at Odawara. Carved into the side of a 586-meter-high mountain, Yamanaka Castle was strategically positioned along the Tokaido Highway, offering superb views of nearby Mt. Fuji, the ocean, and the road leading to Odawara.
