Complete Guide to Nagoya Castle: The History and Highlights of the Legendary Giant Castle Built by Toyotomi Hideyoshi
What is Nagoya Castle?
Nagoya Castle is a magnificent castle built in Hizen Province, spanning Nagoya, Chinzei-cho, Karatsu City, Saga Prefecture, and Genkai-cho, Higashimatsuura District. It was ordered by Toyotomi Hideyoshi to be built as a base for his invasion of the continent during the Bunroku-Keicho War (the Japanese invasions of Korea). It is now designated a National Special Historic Site and is also selected as one of Japan’s Top 100 Castles (number 87).
The most striking features of Nagoya Castle are its astonishing scale and the short time it was built. The castle covers approximately 17 hectares, making it the second largest castle in Japan at the time, after Osaka Castle. Furthermore, it is said that construction began in October 1591 (Tensho 19) and was completed in an astonishingly short six months.
Located on a small hill overlooking the Genkai Sea, it was built in an ideal location as a base for military expeditions to the Korean Peninsula. For seven years, from the start of the war in 1592 (Bunroku 1) until the death of Toyotomi Hideyoshi and the subsequent withdrawal of the various daimyo, it functioned as a base for the invasion of the continent and became the center of Japanese politics, economy, and culture.
History of Nagoya Castle
Background and Circumstances of Construction
Having unified Japan, Toyotomi Hideyoshi’s next ambition was to expand into the continent. Nagoya in Hizen Province, the closest to the Korean Peninsula, was chosen as the front-line base.
In 1591 (Tensho 19), Hideyoshi ordered the various daimyo of Kyushu to construct Nagoya Castle. Kuroda Yoshitaka (Kanbei) was appointed as the chief magistrate, and Kato Kiyomasa, Konishi Yukinaga, and Terazawa Hirotaka oversaw the construction as construction magistrates. With the labor of daimyo gathered from all over Japan, a massive five-story castle with a total stone wall was completed through rapid construction.
Role in the Bunroku-Keicho War
Nagoya Castle functioned as the general headquarters of the Japanese army during the Bunroku-Keicho War (1592-1598). Hideyoshi himself stayed at Nagoya Castle and commanded operations on the Korean Peninsula from there.
Within a 3-kilometer radius of the castle, more than 150 encampments were set up by approximately 160 daimyo and samurai families who had gathered from all over Japan. Many prominent warlords, such as Tokugawa Ieyasu, Maeda Toshiie, Date Masamune, and Uesugi Kagekatsu, gathered in Nagoya, and it is said that at its peak, it was bustling with more than 200,000 people.
The castle town also developed rapidly, forming a large city with a population exceeding 100,000. Merchants, artisans, and tea masters gathered there, and for a time it became the center of Japanese politics, economy, and culture.
Abandonment and Demolition
In 1598 (Keicho 3), with the death of Toyotomi Hideyoshi, the invasion of Korea was called off, and the various daimyo began to withdraw. Nagoya Castle’s role ended, and it rapidly declined.
After the Battle of Sekigahara, the Tokugawa shoginate feared that Nagoya Castle, a legacy of the Toyotomi clan, would be used as a military base again, and in 1606 (Keicho 11), ordered its complete demolition. The castle tower and other structures were dismantled, and most of the stone walls were also destroyed. After a short period of glory of only about 15 years, Nagoya Castle became a “phantom castle.”
Structure and Scale of Nagoya Castle
Castle Layout
Nagoya Castle is a flatland castle with a stepped layout, centered around the main keep (Honmaru), surrounded by other enclosures such as the second, third, Yamasatomaru, Danjomaru, and Mizutemaru. A magnificent five-story, seven-tiered keep stood in the main keep, its imposing presence said to have been visible from the distant Genkai Sea.
The castle’s total area was approximately 17 hectares, making it the second largest castle of its time after Osaka Castle. It is known as a castle that embodies the pinnacle of Azuchi-Momoyama period castle architecture, utilizing the cutting-edge construction techniques of the time, including all-stone walls.
Characteristics of the Stone Walls
The stone walls of Nagoya Castle were constructed by various daimyo (feudal lords) undertaking different projects, resulting in differences in stacking methods and stone materials depending on the location. Various techniques such as rough-hewn stonework, fitted stonework, and cut stonework are mixed together, reflecting the diversity of castle construction techniques of the time.
Even after its demolition, the remaining stone walls offer a glimpse into the castle’s former grandeur. The stone walls around the main keep are particularly impressive; the scattered remnants of the collapsed walls, resembling a “waterfall of stone walls,” create a striking scene that tells the story of Nagoya Castle’s rise and fall.
Expansion of Camp Sites
Around the Nagoya Castle ruins, numerous camp sites of various daimyo (feudal lords) remain. Over 150 camp sites of historically famous warlords, including Tokugawa Ieyasu, Maeda Toshiie, Date Masamune, and Uesugi Kagekatsu, have been identified and designated as a National Special Historic Site under the name “Nagoya Castle Ruins and Camp Sites.”
These camp sites are scattered within a 3-kilometer radius, giving a real sense of the sheer scale of this military city at the time. Remains such as stone walls and earthworks can be found at each camp site, allowing us to understand their original layout and scale.
Highlights of Nagoya Castle Ruins
Main Enclosure Site
The main enclosure site, the heart of Nagoya Castle, is now a plaza, and the stone walls of the keep’s foundation, where the five-story keep once stood, remain. From the main enclosure, you can enjoy a panoramic view of the Genkai Sea, and on a clear day, you can even see as far as Tsushima and Iki. This view makes you truly understand why this location was chosen as a base for the invasion of the continent.
Around the main enclosure, remnants of the destroyed stone walls remain, collapsed down the slope, and are known as the “Waterfall of Stone Walls.” This sight is a valuable historical relic that conveys the thorough destruction carried out by the Tokugawa Shogunate.
Main Gate and Stone Walls
At the main gate, the Ote-guchi, the castle’s main entrance, magnificent stone walls remain. The path leading from here to the main enclosure retains its original appearance, allowing you to follow the path taken by various feudal lords.
Observing the construction methods of the stone walls reveals that techniques differed depending on the location. This is because each daimyo (feudal lord) divided the construction area among themselves, resulting in a valuable historical site that allows for comparison of differences in castle-building techniques.
The Golden Tea Room
Within the grounds of the Nagoya Castle Museum, a reconstruction of the “Golden Tea Room” built by Toyotomi Hideyoshi at Jurakudai in Kyoto is on display. The interior is a magnificent tea room covered in gold leaf, symbolizing Hideyoshi’s power and aesthetic sense.
A Golden Tea Room experience program is also offered, allowing visitors to actually enter the tea room and experience the atmosphere of the time (reservations required, fee applies). It is said that Hideyoshi also held tea ceremonies at Nagoya Castle, making this reconstructed tea room a valuable facility for understanding the cultural aspects of the time.
Virtual Nagoya Castle
At the Nagoya Castle Museum, you can experience “Virtual Nagoya Castle” using the latest VR (Virtual Reality) technology. Using tablet devices or VR goggles, visitors can view CG footage recreating the appearance of Nagoya Castle at the time of its construction, allowing for a visual understanding of the lost castle tower and other structures.
An augmented reality (AR) function is also available; by holding a tablet up at the site, the original buildings are superimposed onto the surrounding landscape, creating a more immersive experience. This virtual Nagoya Castle is attracting attention as a groundbreaking initiative that allows visitors to experience the grandeur of the castle in its heyday, something difficult to imagine from the remains alone.
Saga Prefectural Nagoya Castle Museum
Museum Overview
The Saga Prefectural Nagoya Castle Museum is a history museum built adjacent to the Nagoya Castle ruins. Opened in 1993 (Heisei 5), it is a facility where visitors can learn about the history of exchange between Japan, the Korean Peninsula, and mainland China, focusing on the Bunroku-Keicho War.
The museum building itself is distinctive, designed to resemble the stone walls of Nagoya Castle, harmonizing with the surrounding landscape. Admission is free, making it easy for anyone to learn about history.
Permanent Exhibition
The permanent exhibition introduces the history of Nagoya Castle from its construction to its demolition, the events of the Bunroku-Keicho War, and the Japan-Korea relations of the time, with a wealth of materials and exhibits. In addition to actual artifacts such as excavated ceramics, weapons, and ancient documents, elaborate models and panel displays allow visitors to learn about history in an easily understandable visual way.
Particularly noteworthy is the massive reconstructed model of Nagoya Castle and the surrounding encampment sites. This model allows for a three-dimensional understanding of the layout and scale of the castle and encampments at the time. Furthermore, the relative locations of the encampments of each daimyo are immediately clear, providing an overall picture of Nagoya as a military city.
Exhibition and Event Information
In addition to the permanent exhibition, the Nagoya Castle Museum regularly holds special exhibitions and themed exhibitions. From March 20th to May 10th, 2026, the “Nagoya Castle Museum Collection Exhibition 2026” is scheduled, showcasing valuable materials from the museum’s collection.
In addition, various events such as lectures, symposiums, and experiential learning programs are held. Guided tours of the ruin castles, led by experts, are also regularly offered, allowing visitors to learn more about the history of Nagoya Castle.
Visitor Information
Location: 1931-3 Nagoya, Chinzei-cho, Karatsu City, Saga Prefecture 847-0401
Opening Hours: 9:00 AM – 5:00 PM (Last entry at 4:30 PM)
Closed: Mondays (or the following weekday if Monday is a public holiday), New Year holidays
Admission Fee: Free (Special exhibitions may have a fee)
Parking: Free parking available (200 regular cars, 20 large buses)
Transportation Access:
- Approximately 40 minutes by Showa Bus bound for “Yobuko” from JR Karatsu Station, get off at “Nagoya Castle Museum Entrance” bus stop, 5-minute walk
- Approximately 60 minutes by car from Nagasaki Expressway “Taku IC”
- Approximately 40 minutes by car from Nishi-Kyushu Expressway “Karatsu IC”
Accessibility Information: Wheelchair accessible. Elevators and multi-purpose restrooms are available inside the museum. Wheelchair rentals are also available. Group Visits: For groups of 20 or more, guided tours by an instructor and use of the exhibition hall are available upon prior contact.
Facilities and Sightseeing Around Nagoya Castle Ruins
Camp Site Tours
Around Nagoya Castle Ruins, there are numerous camp sites of famous warlords, including those of Tokugawa Ieyasu, Maeda Toshiie, and Date Masamune. These camp sites are connected by walking paths and are maintained as hiking trails.
The Tokugawa Ieyasu camp site is particularly popular, attracting many history buffs due to its historical significance as the site where Ieyasu, who would later become the ruler of Japan, established his camp. Each camp site has an information board explaining the daimyo’s career and the scale of the camp.
Sightseeing in Yobuko
Located about 10 minutes by car from Nagoya Castle, Yobuko is a port town famous for its fresh squid sashimi. This area is popular with tourists who want to enjoy fresh seafood from the Genkai Sea and combine their visit with a trip to Nagoya Castle.
The Yobuko Morning Market is considered one of Japan’s three major morning markets, a lively market offering local agricultural and marine products. The view from the Yobuko Bridge is also magnificent, offering a panoramic view of the beautiful Genkai Sea.
Highlights of the Genkai Area
The Genkai area on the Higashi-Matsuura Peninsula, where Nagoya Castle ruins are located, also boasts other attractive tourist spots. Hatodomari Cape is a cape jutting out into the Genkai Sea, offering stunning views from its observation deck and known as the northwesternmost point of mainland Japan.
The Genkai Underwater Observation Tower allows visitors to observe the underwater world from land, making it a popular spot for families. This area offers the opportunity to enjoy both natural scenery and historical heritage.
Cultural Value of Nagoya Castle
Importance as a Special Historic Site
Nagoya Castle Ruins and Encampment Site were designated a National Special Historic Site in 1955 (Showa 30). Special Historic Sites are designated only for historical sites of particular importance, and there are only 63 such sites nationwide (as of 2024).
Nagoya Castle was designated a Special Historic Site because, in addition to being a valuable castle ruin from the Azuchi-Momoyama period, it was the stage for the Bunroku-Keicho War, a crucial event in Japanese history, and an indispensable site for understanding international relations between Japan and East Asia.
One of Japan’s Top 100 Castles
In 2006 (Heisei 18), Nagoya Castle was selected as number 87 of the “Japan’s Top 100 Castles” by the Japan Castle Association. This selection was based on a comprehensive evaluation of historical value, architectural value, and scenic value, demonstrating Nagoya Castle’s important position in the history of Japanese castles.
The 100 Famous Castles stamp is located at the Nagoya Castle Museum, attracting many castle enthusiasts. Although the buildings are gone, the vast castle ruins and encampment sites are highly valued as a precious legacy that conveys the scale and historical importance of the time.
Hub for Japan-Korea Exchange
The Nagoya Castle Museum, commends the unfortunate history of the Bunroku-Keicho War between Japan and the Korean Peninsula, also functions as a facility to deepen mutual understanding and friendship between Japan and Korea. The exhibits present not only the Japanese perspective but also the Korean perspective, ensuring a multifaceted learning experience.
Many researchers and tourists from Korea visit, making it a place for international exchange. The museum also provides informational pamphlets in Korean, Chinese (simplified and traditional), and English, accommodating foreign tourists.
Points to Note When Visiting Nagoya Castle
Estimated Visiting Time
Allow approximately one hour for a visit to the Nagoya Castle Museum and one to two hours for exploring the castle ruins. Including a tour of the encampment sites, this will be a half-day to full-day course. Since it’s a vast historical site, we recommend wearing comfortable shoes and clothing.
Best Season
Nagoya Castle Ruins can be visited year-round, but spring and autumn are especially recommended. Cherry blossoms bloom in spring, and the autumn foliage is beautiful, allowing you to enjoy the scenery while strolling. Summer is hot with strong sunshine, so you’ll need to bring a hat and drinks. Winter is cold with strong winds from the Genkai Sea, so you’ll need to dress warmly.
Photography Tips
The view of the Genkai Sea from the main keep site is spectacular and a popular photography spot. The view at sunset is particularly beautiful, and you can take impressive photos of the sunset over the sea and the silhouette of the castle ruins.
Also, the “Stone Wall Waterfall,” where collapsed stone walls are scattered on the slope, is a popular subject symbolizing the history of Nagoya Castle. Combining it with seasonal flowers or autumn leaves will make for even more impressive photos.
Special Use and Research Activities
Nagoya Castle Museum accepts special use requests for its materials and exhibits (viewing, photography, etc., for research purposes). Prior application is required, but use for academic research and educational activities is permitted. The museum hall can also be used for lectures and events (application required).
Summary
Nagoya Castle, a “phantom castle” that existed for only a short period of about 15 years, possesses immense historical significance. It was a symbol of Toyotomi Hideyoshi’s ambition, a military city where feudal lords from across Japan gathered, and an important historical site for understanding international relations between Japan and East Asia.
Although the buildings themselves are now gone, the vast castle ruins, encampment sites, and the Saga Prefectural Nagoya Castle Museum allow us to understand its grandeur and historical importance at the time. Utilizing cutting-edge technologies such as Virtual Nagoya Castle, the facility continues to evolve as a place where visitors can visually experience the lost castle.
Standing on a hill overlooking the Genkai Sea, one can imagine the grand military city that once housed 200,000 people—Nagoya Castle Ruins is a valuable place to learn about Japanese history from multiple perspectives. It’s a historical site you should definitely visit when you’re in northern Saga Prefecture.
Links and Reference Information
Official Website: Saga Prefectural Nagoya Castle Museum Official Website (https://saga-museum.jp/nagoya/)
Related Links:
- Karatsu City Tourism Association
- Saga Prefecture Tourism Federation “Asobo Saga”
- Japan Castle Association (Information on Japan’s 100 Famous Castles)
- Agency for Cultural Affairs (Information on Special Historic Sites)
Nagoya Castle Ruins and the encampment site are a unique and valuable heritage site in Japanese history. The latest information on museum exhibits, events, and visitor information can be found on the official website. Please check it before your visit to ensure a fulfilling experience.
