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.
The castle stood on Mount Kakuo, a 200-meter-high mountain with steep cliffs, accessible only via a narrow path. Strategically important, it was considered the "key" to controlling Totomi Province and the nearby Tokaido highway, which lies 11 kilometers to the south. The castle's layout formed a "Z" shape, spanning the eastern and western peaks of the mountain, with a saddle-like ridge connecting the two. The eastern peak contained the original fortifications, including the inner bailey, while the western peak was added later by the Takeda clan. The castle was surrounded by terraces, dry moats, and earthen ramparts. Despite lacking stone walls, its steep terrain made it nearly impregnable.
The exact origins of Takatenjin Castle are uncertain, but it is believed to have been built by the Kushima clan in the 15th century. The Kushima were retainers of the Imagawa clan, but were eventually suppressed after siding against Imagawa Yoshimoto in an internal struggle. Yoshimoto later gave the castle to the Ogasawara clan. During the Battle of Anegawa in 1570, Tokugawa Ieyasu controlled the castle, leaving Ogasawara Nagatada as its castellan.
In 1571, Takeda Shingen besieged Takatenjin Castle with 20,000 troops but failed to capture it. Three years later, in the Siege of Takatenjin (1574), Takeda Katsuyori succeeded where his father had not, capturing the castle and earning great prestige. However, the victory was short-lived as the Takeda suffered heavy losses the following year to the Oda-Tokugawa alliance. By 1580, unable to maintain supply lines to the castle, Tokugawa Ieyasu decided to isolate it rather than attack directly. The defenders, running out of supplies, made a desperate attempt to break the siege in March 1581, led by their commander Okabe Motonobu. All 700 men were killed, and the castle was abandoned soon after.
Today, the city of Kakegawa preserves the castle ruins, with several hiking trails leading up the mountain. The summit hosts a Shinto shrine and monuments honoring the war dead from the Satsuma Rebellion and the First Sino-Japanese War. A faux tenshu (main keep) built before World War II was destroyed by lightning, leaving only a concrete foundation behind.
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Edo Castle
The history of Edo Castle dates back to the Heian period, when the Edo clan built a small fort on this site. In 1457, the vassal of the Uesugi clan, Ota Dokan (1432–1486), constructed a full-scale castle here. Internal conflicts weakened the Uesugi clan, and in 1524, Ota Dokan’s grandson, Ota Yasutaka, surrendered the castle without resistance to the forces of Hojo Soun, the ambitious leader of the Hojo clan. While Odawara Castle remained the clan's main stronghold, Edo was considered a key strategic fortress.
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Samurai Museum Shinjuku
Situated in the vibrant district of Shinjuku, the museum showcases an extensive collection of samurai armor, weapons, and cultural artifacts spanning from the Kamakura to the Edo period. The exhibits aim to convey the samurai's unwavering commitment to honor and discipline, reflecting how their spirit continues to influence modern Japanese culture.
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Anjo Castle
Anjo Castle was built on a slight elevation at the edge of the Hekikai Plateau, about 2 kilometers southeast of present-day central Anjo City in Aichi Prefecture. Today, the surrounding area thrives on large-scale agriculture and automotive manufacturing, utilizing the expansive flatlands and its proximity to the Nagoya region.
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Numata Castle
Numata Castle, located in Numata, northern Gunma Prefecture, Japan, has a rich and complex history. During the late Edo period, it served as the residence of the Toki clan, who ruled the Numata Domain. Over the centuries, the castle changed hands multiple times and was the site of significant battles during the Sengoku period.
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Iwabitsu Castle
Iwabitsu Castle is a yamashiro-style (mountain) castle located atop Mount Iwabitsu in Higashiagatsuma, Gunma Prefecture, Japan. Recognized for its historical significance, its ruins have been protected as a National Historic Site since 2019.
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Tsutsujigasaki Castle
Tsutsujigasaki Castle (Tsutsujigasaki Yakata) served as the fortified residence of the last three generations of the Takeda clan and is located in the heart of Kofu, Yamanashi Prefecture, Japan. Unlike traditional Japanese castles, it was not referred to as a "castle" in Japanese, as the Takeda clan famously believed in relying on their warriors as their true fortifications, stating, "Make men your castle, men your walls, men your moats." Designated a National Historic Site in 1938, the ruins are now open to the public and house the Takeda Shrine, a Shinto shrine dedicated to the deified spirits of the Takeda clan.
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Nagoya Castle
Nagoya Castle, originally built by the Owari Domain in 1612 during the Edo period, stands on the site of an earlier Oda clan castle from the Sengoku period. It became the centerpiece of Nagoya-juku, a significant castle town on the Minoji road, which connected two major Edo Five Routes: the Tokaido and the Nakasendo. In 1930, ownership of the castle was transferred to the city by the Imperial Household Ministry, establishing it as the focal point of modern Nagoya. Although partially destroyed in the Pacific War in 1945, the castle has undergone continuous restoration and preservation efforts since 1957.
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Matsushiro Castle
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.
