Kuroki Higashi Castle (Uda City, Nara Prefecture) Complete Guide | History, Remains, and Access Information
What is Kuroki Higashi Castle?
Kuroki Higashi Castle is a Sengoku period mountain castle located in the Ouda district of Uda City, Nara Prefecture. Built on a mountaintop approximately 450 meters above sea level, this castle is believed to have played a crucial role during Matsunaga Hisahide’s invasion of Kuchi-Uda. Even today, clear remains such as double moats, earthworks, and dry moats remain, making it a valuable historical site that conveys the castle-building techniques of the Sengoku period.
The most distinctive feature of Kuroki Higashi Castle is its coordinated system with the surrounding Kuroki Nishi Castle and Kuroki Kita Castle. These three castles were visible to each other and formed a unified defensive system. This kind of coordinated defense by multiple castles is a typical example of Sengoku period mountain castles and is attracting attention in castle research.
History of Kuroki Higashi Castle
Background of Construction and Matsunaga Hisahide
The exact date of construction of Kuroki Higashi Castle is uncertain due to a lack of historical records, but it is presumed to have been built during the Eiroku era (1558-1570) when Matsunaga Hisahide invaded the Uda region. Matsunaga Hisahide was one of the leading warlords of the Sengoku period, wielding considerable power in Yamato Province (present-day Nara Prefecture).
At that time, the Uda region was controlled by the Akiyama clan, and their castle, Akiyama Castle, was known as a strong fortress. To capture Akiyama Castle, Matsunaga Hisahide employed a strategy of building multiple outposts (tsukejiro) around it, forming a siege network. Kuroki Higashi Castle is thought to have been one of these outposts, serving as a base for monitoring and attacking Akiyama Castle.
The Uda Region in the Sengoku Period
The Uda region is a historically significant area, mentioned in ancient texts such as the “Kojiki” and “Nihon Shoki,” and is also known as the setting for the legend of Emperor Jimmu. During the Sengoku period, it was considered a crucial transportation hub and was constantly contested in power struggles within Yamato Province.
Before Matsunaga Hisahide’s invasion, the Uda region was controlled by the local Akiyama clan, but they gradually lost power in the face of Hisahide’s formidable military strength. The construction of Kuroki Higashi Castle and other auxiliary castles was a military measure to solidify Hisahide’s control over the region.
Changes After Matsunaga Hisahide’s Death
In 1577, Matsunaga Hisahide rebelled against Oda Nobunaga at Shigisan Castle, perishing along with the castle. Afterward, Yamato Province came under the control of the Oda clan, and then the era of Toyotomi Hideyoshi began. It is unclear when Kuroki Higashi Castle was last used, but it is believed to have ended its military role and been abandoned with the end of the Sengoku period (Warring States period).
After the Edo period, Kuroki Higashi Castle disappeared from the historical stage, and for a time, its existence was forgotten even by the locals. However, recent advances in castle research have led to a re-evaluation of its historical value, and it is now attracting attention among castle enthusiasts and history lovers.
Structure and Remains of Kuroki Higashi Castle
Layout and Overall Structure
Kuroki Higashi Castle has a typical mountain castle structure, with the main enclosure (honmaru) at the mountaintop and multiple baileys (kuruwa) arranged along the ridge. The castle area extends approximately 150 meters east-west and 100 meters north-south, and its defensive design skillfully utilizes the steep terrain.
The main enclosure is a relatively flat space, approximately 30 meters square. It is presumed that there was a building here, but no clear remains such as foundation stones have been confirmed. The main enclosure is surrounded by earthen ramparts, enhancing its defensive capabilities.
Highlights of the Double Moat
The greatest highlight of Kuroki Higashi Castle is the double moat located on the north side of the main enclosure. A moat is a dry moat dug to cut across a ridge, and it is an important defensive structure to prevent enemy intrusion. The double moat at Kuroki Higashi Castle consists of two parallel moats, each approximately 5 meters wide and 3 meters deep, with an earthen rampart built between them.
This double structure creates a multi-layered defensive system where enemies who break through the first moat are blocked by the earthen rampart and then face the second moat. Even today, the shape of the moats remains clearly visible, allowing visitors to appreciate the high level of castle-building technology of the Sengoku period.
Earthen Ramp and Dry Moat
The earthen ramparts surrounding the main enclosure remain, approximately 1 to 2 meters high. These ramparts were not merely walls of earth; they also served to protect against enemy arrows and firearms, and to obscure the view of the castle from the outside.
Dry moats are positioned on the south and east sides of the castle, reinforcing the weak points of the terrain. These dry moats utilize the natural valley topography while also being artificially excavated to enhance defensive capabilities. The bottom of the moats is still clearly visible today, offering traces of the civil engineering techniques of the time.
Arrangement of the Enclosures
Below the main enclosure, the second and third enclosures are arranged in a stepped fashion. These enclosures are thought to have been used for garrisoning soldiers and storing supplies. Each enclosure is separated by steep slopes called “kirigishi,” restricting movement between them and enhancing defensiveness.
The size of the enclosures is smaller than the main enclosure, each measuring approximately 10-20 meters square. This indicates that Kuroki Higashi Castle was not a full-fledged residence intended for long-term sieges, but rather a temporary base for military operations.
Coordination with Kuroki West Castle and Kuroki North Castle
The Three-Castle Coordination Defense System
Understanding the military value of Kuroki East Castle is crucial to its coordinated relationship with Kuroki West Castle and Kuroki North Castle. These three castles are located approximately 500-800 meters apart, allowing for visual communication.
During the Sengoku period, information transmission via visual signals such as smoke signals and flags was essential. The three Kuroki castles utilized their interconnected positions to quickly share information about enemy movements. It is believed that when one castle was under attack, reinforcements could be sent from the other castles, or a pincer attack could be launched.
Role in the Siege of Akiyama Castle
The three Kuroki castles played a key role in Matsunaga Hisahide’s siege of Akiyama Castle. It is presumed that Kuroki East Castle monitored the eastern side of Akiyama Castle, preventing escapes and supply lines from that direction.
Similarly, Kuroki West Castle was responsible for the west side, and Kuroki North Castle for the north side, creating a system that surrounded Akiyama Castle from three directions. This type of siege tactic using multiple outposts was a common method in siege warfare during the Sengoku period, and the three Kuroki castles are a typical example.
Comparison of Each Castle’s Characteristics
Kuroki East Castle, Kuroki West Castle, and Kuroki North Castle each have distinct characteristics. Kuroki East Castle has the best-preserved remains of the three castles, with defensive structures such as double moats clearly visible. Kuroki West Castle is slightly larger in scale, with a structure that could accommodate more troops. Kuroki North Castle is located in the most rugged terrain, making it a castle with a strong character as a natural stronghold.
These differences are thought to reflect the different roles assigned to each castle. By visiting and comparing the three castles, you can gain a deeper understanding of Matsunaga Hisahide’s castle-building strategy.
Highlights of Kuroki East Castle
The Impressive Double Moat
When visiting Kuroki East Castle, the first thing to pay attention to is the double moat. Standing on site, you’ll be amazed by its scale and the ingenuity of its construction. The deeply excavated moat has maintained its shape for over 400 years, a testament to the high level of castle-building technology during the Sengoku period.
Looking up from the bottom of the moat, you can truly appreciate the steepness of the cliffs on both sides. You’ll understand just how difficult it must have been to attack the castle by crossing this moat. It’s also an excellent spot for photography, a must-see for castle enthusiasts.
View from the Earthworks
Climbing the earthworks of the main enclosure offers a panoramic view of the surrounding mountains and the town of Uda. On a clear day, you can even see the locations of Kuroki West Castle and Kuroki North Castle, allowing you to visually confirm the relative positions of the three castles. This view is one of the reasons why Kuroki East Castle was chosen as a military base.
Especially during the clear autumn and winter months, you can see the distant mountain ranges and enjoy a spectacular view. One of the charms of mountain castles is that you can enjoy both castle sightseeing and nature walks at the same time.
Preservation of the Remains
The remains of Kuroki Higashi Castle are in good condition compared to other mountain castles in Uda City. This is thought to be because the castle was located deep in the mountains and was less affected by development. Major remains such as moats, earthworks, dry moats, and steep slopes remain clearly visible, making it easy to imagine what the castle looked like during the Sengoku period.
In recent years, local castle preservation groups and history enthusiasts have been carrying out maintenance activities, and viewing paths have been improved. However, it has not been developed into a full-fledged tourist destination, and one of its charms is that you can experience the original atmosphere of a mountain castle.
Nature in the Four Seasons
Kuroki Higashi Castle is located in a mountain rich in nature, and you can enjoy the scenery of the four seasons. In spring, the fresh greenery is beautiful, and in summer, it is enveloped in deep green. In autumn, the mountains are colored with autumn leaves, and in winter, you can see the castle ruins standing amidst a snowy landscape.
The autumn foliage season, in particular, is the perfect time to enjoy both historical walks and nature. However, in winter, snow and ice can make access to the castle difficult, so caution is advised when planning your visit.
Access Information
Access by Public Transportation
The nearest station to Kuroki Higashi Castle by public transportation is Kintetsu Osaka Line’s “Haibara Station.” From Haibara Station, take a Nara Kotsu bus towards “Ouda” and get off at the “Kuroki” bus stop. From the bus stop to the castle ruins, it’s about a 30-minute walk along a mountain path.
Since bus services are limited, it’s recommended to check the timetable in advance and plan your trip considering the return bus schedule. Also, since there are few signs on the path from the bus stop to the castle ruins, it’s important to check the route beforehand using a map or GPS app.
Access by Car
Access by car is the most convenient. From the Meihan Expressway’s “Hari IC,” head south on National Route 369, and you’ll arrive in the Kuroki area in about 30 minutes. There is parking space near the castle ruins, but it is not a properly maintained parking lot, so you will need to park on the street. Please be considerate of the local residents.
When searching with a car navigation system, it is recommended to set “Kuroki, Ouda-ku, Uda City, Nara Prefecture” as your destination. However, the last few hundred meters are a narrow mountain road, so please drive with caution.
Access Route and Time Required
The most common route to the castle ruins is a mountain path starting from the Kuroki settlement. The climb from the trailhead to the main enclosure takes about 20 minutes. The path is well-maintained, but there are steep slopes, so we recommend wearing comfortable walking shoes such as trekking shoes.
Allow 30 minutes to an hour to explore the castle ruins. If you want to carefully observe the remains or enjoy taking photographs, you will need more time. Also, if you plan to visit Kuroki West Castle and Kuroki North Castle as well, we recommend allocating about half a day.
Important Notes for Visitors
Kuroki Higashi Castle is not a major tourist attraction, but rather the remains of a mountain castle. Please observe the following points when visiting:
- Clothing: Long-sleeved shirts, long pants, and trekking shoes are recommended. Insect repellent is also necessary during the summer months.
- Items to Bring: Please bring drinking water, a map, a GPS device, a first-aid kit, and a mobile phone.
- Weather: It is recommended to avoid visiting during or after rain, as the ground can become slippery.
- Solo Travel: Visiting in a group is safer if possible. If traveling alone, inform family or friends of your destination.
- Manners: Please observe basic manners such as not damaging the ruins, taking your trash with you, and not trespassing on private property.
Nearby Tourist Attractions
Akiyama Castle Ruins
The Akiyama Castle Ruins, which were the target of Kuroki Higashi Castle’s attack, also remain within Uda City. This castle, which served as the residence of the Akiyama clan, is larger in scale and has a more complex layout than Kuroki Higashi Castle. Visiting both Kuroki Higashi Castle and Uda Matsuyama Castle allows you to understand the battles of the Sengoku period from both the perspectives of the attacking and defending sides.
Uda Matsuyama Castle Ruins
Uda Matsuyama Castle is a modern castle built by Taga Hidetane, a retainer of Toyotomi Hidenaga. Although it is from a different era than Kuroki Higashi Castle, it is an important historical site for understanding the castle history of the Uda region. The townscape of the castle town remains, allowing visitors to enjoy the historical atmosphere.
Murōji Temple
Murōji Temple, located in Murō, Uda City, is an ancient Shingon Buddhist temple known as “Women’s Kōya.” It possesses many cultural assets, including a national treasure, a five-story pagoda. It is about a 30-minute drive from Kuroki Higashi Castle, making it a suitable spot to visit in conjunction with castle sightseeing.
The Townscape of Ouda
The Ouda district retains townhouses from the Edo period to the early Showa period and has been designated as an Important Preservation District for Groups of Traditional Buildings. It is recommended to stop by before or after visiting Kuroki Higashi Castle and stroll through the historic townscape. There are also shops selling local specialties and traditional crafts.
History and Culture of Uda City
History from Ancient Times
Uda City is a historical region mentioned in the ancient “Kojiki” and “Nihon Shoki.” According to the legend of Emperor Jimmu’s eastern expedition, an important battle took place in Uda, making it one of the important stages in ancient history.
During the Nara period, it was known as a place for gathering medicinal herbs, which were presented to the imperial court. This tradition continues to this day, and Uda City is known as a production area for medicinal herbs.
From the Middle Ages to the Sengoku Period
During the Middle Ages, local lords vied for power, forming a complex power structure. Local lords such as the Akiyama and Sawa clans held power, each using their castles as bases. During the Sengoku period (Warring States period), the area was invaded by Matsunaga Hisahide, and subsequently came under the control of Oda Nobunaga and Toyotomi Hideyoshi.
Many mountain castles, including Kuroki Higashi Castle, were built during this turbulent Sengoku period. These castle ruins are valuable legacies that convey the tense situation of that time.
From the Early Modern Period to the Present
During the Edo period, the area became part of the Oda clan’s territory, and the Oda Matsuyama Domain was established. Ouda, developed as a castle town, flourished as a commercial center, and its townscape remains to this day.
After the Meiji era, modernization progressed, and in 2006, the former Ouda Town, Utano Town, Haibara Town, and Muro Village merged to form the current Uda City. Currently, the city is focusing on promoting tourism that leverages its history and natural beauty.
Research and Preservation Activities of Kuroki Higashi Castle
Position in Castle Research
Kuroki Higashi Castle occupies an important position in castle research as a typical example of a siege fort (an outpost) from the Sengoku period. It is particularly valuable material for studying Matsunaga Hisahide’s castle construction techniques and strategies.
Recent archaeological excavations and surveys have revealed the castle’s structure in more detail. These research findings have been published in academic papers and reports, contributing to the development of castle research.
Local Preservation Activities
Preservation activities for Kuroki Higashi Castle are being carried out by local history enthusiasts and castle preservation groups. Regular grass cutting, maintenance of viewing paths, and installation of information boards are carried out to create a safe environment for visitors.
Furthermore, history lectures and tours for local residents are held, increasing recognition of the castle as a local historical heritage. These activities play an important role in the preservation and utilization of the castle ruins.
Future Challenges and Prospects
There are several challenges in the preservation and utilization of Kuroki Higashi Castle. First, improving access to the castle ruins is crucial. Currently, public transportation access is inconvenient, and creating an environment that makes it easier for more people to visit is needed.
Furthermore, the preservation of the remains is a vital issue. Because the remains are susceptible to damage from natural disasters and deterioration over time, regular surveys and appropriate preservation measures are necessary.
On the other hand, there are expectations for its utilization as a tourist resource. New initiatives are being considered, such as developing trekking courses around the three Kuroki castles and providing information using digital technology. The challenge going forward is to find sustainable utilization methods while balancing the preservation of historical heritage with tourism promotion.
Summary
Kuroki Higashi Castle is a valuable mountain castle ruin from the Sengoku period located in Uda City, Nara Prefecture. Built by Matsunaga Hisahide for the attack on Akiyama Castle, this castle retains clear remains, including double moats, conveying the castle-building techniques and strategies of the time.
The defensive system, in conjunction with Kuroki Nishi Castle and Kuroki Kita Castle, occupies an important position in castle research as a typical example of the auxiliary castle tactics of the Sengoku period. The well-preserved remains and the views from the mountaintop are a major attraction for castle enthusiasts.
While access is somewhat difficult, it allows you to experience the authentic atmosphere of a mountain castle. When visiting Uda City, be sure to visit Kuroki Higashi Castle and experience the historical romance of the Sengoku period. Visiting it in conjunction with the nearby Akiyama Castle ruins, Muroji Temple, and the townscape of Ouda will allow you to gain a deeper understanding of Uda’s history and culture.