Gassan Hiwa Castle (Miyakonojo City, Miyazaki Prefecture) Complete Guide | History, Highlights, and Access Information for the Three High Castles of Hyuga
Gassan Hiwa Castle is a mountain castle located in Oide, Takajo-cho, Miyakonojo City, Miyazaki Prefecture, dating from the medieval to the Sengoku period. Also known as “Takajo” and “Kaneshige Honjo,” it played a crucial role as a strategic stronghold in Hyuga Province from the Nanboku-cho period to the Sengoku period. Currently, it is maintained as the Takajo Local History Museum, featuring a replica keep, making it a valuable tourist spot where visitors can learn about the region’s history.
What is Gassan Hiwa Castle? | One of the Three High Castles of Hyuga
Gassan Hiwa Castle is a famous castle counted among the “Three High Castles of Hyuga” that existed within Hyuga Province. The Three High Castles of Hyuga refer to the three castles: Gassan Hiwa Castle (Mimatain Takajo), Niinain Takajo, and Musain Takajo (Musa Castle). All of these functioned as important strategic fortresses in Hyuga Province. Gassan Hiyori Castle is a typical mountain castle built on the edge of a Shirasu plateau, situated on a hill approximately 150 meters above sea level. This location offered excellent defensive advantages and was a strategically important position overlooking the surrounding area. The castle measured approximately 800 meters north-south and 500 meters east-west, making it a large-scale fortress for its time.
History of Gassan Hiyori Castle
Construction during the Nanboku-cho period and Kimotsuki Kaneshige
The history of Gassan Hiyori Castle dates back to the Nanboku-cho period. It is believed to have begun in the first year of Emperor Go-Daigo’s reign (1318), when Kimotsuki Hachiro Kaneshige, serving as the Mimata-in official, built the castle. Kimotsuki Kaneshige was known as a powerful general of the Southern Court and operated from this castle, known as “Mimata-in Kaneshige Honjo” (Mimata-in Kaneshige’s main castle).
In 1340 (Ryakuō 3), Kaneshige Kimotsuki of the Southern Court fought a fierce battle against the large army of Naosuke Hatakeyama of the Northern Court. This battle is recorded as one of the important phases in the Kyushu region during the Nanboku-chō conflict. The Kimotsuki clan was a powerful local family, and Gassan Hiyori Castle was a symbol of their power.
Battles in the Sengoku Period | The Conflict Between the Ito and Shimazu Clans
With the arrival of the Sengoku period, Gassan Hiyori Castle became the stage for fierce battles between the Ito and Shimazu clans in Hyūga Province. It is believed that the castle’s layout as seen today was completed during this period.
The Ito clan expanded their power as a powerful daimyo in Hyūga Province, bringing the Takajō region, including Gassan Hiyori Castle, under their control. Meanwhile, the Shimazu clan, based in Satsuma Province, also sought to advance into Hyūga Province as part of their northward expansion policy, and fierce battles were repeatedly fought between the two clans.
Particularly in the latter half of the 16th century, the Shimazu clan intensified their invasion of Hyuga Province, and fierce battles unfolded around Gassan Hiyori Castle. The struggle for control of this region was a crucial strategic objective for the Shimazu clan, who aimed to unify Kyushu.
Changes Since the Early Modern Period
After Toyotomi Hideyoshi’s conquest of Kyushu, Gassan Hiyori Castle lost its strategic importance and was abandoned. During the Edo period, only the castle ruins remained, and the land was used for farming and forestry.
Even after the Meiji era, the castle ruins were recognized as a historical heritage site of the region, but serious investigations and maintenance only began in the Showa era. Currently, it is designated as a historical site of Miyazaki Prefecture, and efforts are being made to preserve and utilize it.
Structure and Layout of Gassan Hiyori Castle
Complex Structure Composed of Seven Enclosures
The most distinctive feature of Gassan Hiyori Castle is its complex layout, composed of seven enclosures (kuruwa). These enclosures are as follows:
- Ike-no-shiro: Located in the northern part of the castle grounds, this enclosure served as the front line of defense.
- Nai-no-shiro: Adjacent to Ike-no-shiro, this is where a replica keep currently stands.
- Naka-no-shiro: An important enclosure located in the central part of the castle grounds.
- Honjo: The main enclosure, forming the core of the castle.
- Shinjo: An enclosure adjacent to Honjo.
- Taruhara: An enclosure located in the southern part of the castle grounds.
- Torisoe: An enclosure located at the edge of the castle grounds.
These enclosures are cleverly arranged, utilizing the topography of the Shirasu plateau, and designed to work in conjunction with each other to provide defensive functions. Moats and earthworks were constructed between each enclosure to prevent enemy intrusion.
Lord’s Residence at the Foot of the Mountain
Separate from the group of enclosures on the mountaintop, the lord’s residence was located at the foot of the mountain. This residence served as both a place for daily life and a place for conducting government affairs. The mountain castle functioned as a defensive stronghold during wartime, while the inhabitants lived in residences at the foot of the mountain during peacetime—a typical distinction for medieval mountain castles.
Remains of Earthworks and Moats
Even today, the castle ruins retain well-preserved remains such as earthworks and moats. The earthworks surrounding the baileys, in particular, are valuable relics demonstrating the castle-building techniques of the time. These earthworks not only prevented enemy intrusion but also made the interior of the baileys difficult to see from the outside.
Moats, dug to cut across the ridge, played a crucial role in blocking enemy advances. Some of the moats at Gassan Hiyori Castle are several meters deep, giving a glimpse into the large-scale civil engineering work of the time.
Highlights of Gassan Hiyori Castle
Replica Castle Tower (Takajo Local History Museum)
The biggest highlight of Gassan Hiyori Castle is the replica castle tower built around the inner and inner baileys. This castle tower now functions as the Takagi Local History Museum, displaying exhibits on the region’s history and culture.
Although there are no records of a historical castle tower existing here, the replica tower serves as a symbol of the castle ruins and plays a role in conveying the region’s history as a museum. From the tower, you can enjoy a panoramic view of Takagi town and the surrounding mountains, experiencing the scenery seen by the former castle lords.
Exhibits at the Takagi Local History Museum:
- Materials related to the history of Gassan Hiyori Castle
- Armor and daily life tools from the Sengoku period
- Exhibits related to the conflict between the Ito and Shimazu clans
- Local folklore materials
- Artifacts unearthed during archaeological excavations
Exploring the Fortifications
The castle ruins have been developed into a park, allowing visitors to explore the various fortifications. The remains are particularly well-preserved around the main castle and the main castle, allowing visitors to experience the scale and structure of the castle at that time.
While the walking paths are well-maintained, some sections are mountain trails, so comfortable shoes are recommended. In spring, cherry blossoms bloom, and in autumn, the leaves turn beautifully, making this a place where you can enjoy the changing seasons while strolling through history.
Relationship between Keishoji Temple and the Castle Ruins
Near the Gassan Hiyori Castle ruins is Keishoji Temple, which has deep ties to the castle’s history. It is believed that Keishoji Temple functioned as a family temple for the castle lord and those associated with the castle, and stone monuments and memorial towers related to the castle remain on the temple grounds.
Scenic Viewpoint
From the castle ruins, you can see the Miyakonojo Basin and the Kirishima mountain range, and on clear days, you can even see Sakurajima in the distance. This excellent view is one of the reasons why Gassan Hiyori Castle was considered a strategically important location. Even today, it remains a popular photo spot, attracting many tourists.
Tourist Information
Opening Hours and Fees
Takashiro Local History Museum (Replica Castle Tower)
- Opening Hours: 9:00 AM – 5:00 PM (Last entry at 4:30 PM)
- Closed: Mondays (or the following day if Monday is a public holiday), New Year holidays
- Admission Fee: Adults 200 yen, High school students and younger free
*Please note that fees and opening hours may change. Please check the latest information on the Miyakonojo City official website before visiting.
Estimated Visiting Time
Please allow the following times for visiting Gassan Hiyori Castle:
- Visiting only the museum: 30 minutes to 1 hour
- Visiting the museum and exploring the main enclosures: 1 hour to 1 hour 30 minutes
- Thoroughly exploring all enclosures: 2 hours to 3 hours
If you are interested in history or castles, we recommend visiting with ample time.
Nearby Tourist Attractions
The following are some of the tourist attractions near Gassan Hiyori Castle:
Miyakonojo City
- Miyakonojo Shimazu Residence: The site of the Shimazu clan’s residence, featuring a beautiful garden.
- Miyakonojo Historical Museum: A facility where you can learn about the region’s history comprehensively.
- Sekinoo Falls: A famous waterfall selected as one of Japan’s Top 100 Waterfalls.
Around Takajo Town
- Takajo Onsen: A hot spring facility where you can relax after exploring the castle ruins.
- Kannonike Park: A park known for its cherry blossoms.
By combining these nearby spots, you can create a sightseeing plan that allows you to fully enjoy the history and nature of Miyakonojo City.
Access Information
Access by Public Transportation
By Train and Bus
- Get off at Miyakonojo Station on the JR Nippo Main Line.
- Take the Miyazaki Kotsu bus bound for Takajo (approximately 30 minutes).
- Get off at the Takajo-Kamimachi bus stop.
- Approximately 5 minutes on foot from the bus stop.
Since bus services are limited, it is recommended to check the timetable in advance. Especially on weekends and holidays, the number of services may be reduced.
Access by Car
From Miyazaki City
- Approximately 15 minutes from Miyakonojo IC on the Miyazaki Expressway
- Via National Route 10 to Takajo Town
From Kagoshima City
- Approximately 15 minutes from Miyakonojo IC on the Miyazaki Expressway
- Or head north on National Route 10
Parking
- Dedicated parking lot for Takajo Local History Museum (free)
- Accommodates approximately 20 regular cars
The museum is a short walk from the parking lot. It may get crowded during peak tourist seasons and holidays, so we recommend visiting earlier in the day.
Address and Map Information
Location: 2643-1 Oide, Takajo-cho, Miyakonojo City, Miyazaki Prefecture
When using car navigation, please search for “Takajo Local History Museum” or the address above. You can also search for “Gassan Hiyori Castle” or “Takajo Local History Museum” using smartphone map apps.
Points to Note and Advice for Visitors
Clothing and Items to Bring
When visiting Gassan Hiyori Castle Ruins, please note the following:
- Comfortable walking shoes: You may be walking on mountain paths when exploring the castle ruins.
- Seasonal clothing: The sun can be strong in summer, and the wind can be cold in winter.
- Drinks: Hydration is especially important in summer to prevent heatstroke.
- Insect repellent: There may be many insects from spring to autumn.
- Camera: Ideal for photographing views and ruins.
Photography
Photography is generally permitted at the castle ruins and inside the museum, however, some exhibits inside the museum may be off-limits to photography. Please check the museum’s guide and staff instructions before taking pictures.
The views from the reconstructed keep and castle ruins are excellent photo spots, so don’t forget your camera or smartphone. The scenery at sunset is particularly beautiful and popular with photography enthusiasts.
Visiting in Rainy Weather
While it is possible to visit the museum even in rainy weather, caution is advised when walking around the castle ruins as the ground can become slippery. For safety reasons, it is recommended to refrain from visiting during heavy rain or typhoons.
Cultural Value of Gassan Hiyori Castle
Gassan Hiyori Castle possesses high historical and cultural value in the following respects:
A Typical Example of a Medieval Mountain Castle
The castle’s layout, skillfully utilizing the topography of the Shirasu plateau, exhibits a typical structure of medieval mountain castles in southern Kyushu. The complex structure, with its seven organically arranged baileys, speaks to the high level of castle-building technology of the time.
A Witness to History from the Nanboku-cho Period to the Sengoku Period
This is a valuable historical site that conveys the history of the Kyushu region during important turning points in Japanese history, from the Nanboku-cho conflict to the warring states period of the Sengoku period. In particular, the conflict between the Ito and Shimazu clans symbolizes the power struggles in Kyushu during the Sengoku period, and Gassan Hiyori Castle, the stage for this conflict, holds significant historical importance.
Important Historical Materials for Local History Research
This site is indispensable for understanding the history of Miyakonojo City and Takajo Town, and is an important cultural heritage site that forms the identity of the region. Further archaeological excavations and research may reveal new historical facts in the future.
Summary | The Charm of Gassan Hiyori Castle
Gassan Hiyori Castle is a historical heritage site that Miyakonojo City, Miyazaki Prefecture, is proud of. The castle ruins, which tell the story of the turbulent history from the Nanboku-cho period to the Sengoku period, are still well-preserved today, allowing visitors to imagine what it was like in those times.
The Takajo Local History Museum, built as a replica of the castle tower, allows visitors to learn about the region’s history and culture, and the view from the castle ruins impresses visitors. The complex layout, consisting of seven baileys, is a typical example of a medieval mountain castle and a fascinating site for castle enthusiasts.
When visiting Miyakonojo City, be sure to visit the Gassan Hiyori Castle ruins and experience the history of Hyuga Province and the romance of the Sengoku period. Standing at this strategically important location, where the Ito and Shimazu clans fiercely fought, and gazing upon the scenery seen by the warlords of that time will deepen your understanding of history.
Visiting this site along with other nearby tourist attractions will allow you to fully enjoy the charm of Miyakonojo City. It’s a recommended tourist destination not only for history buffs but also for those who want to enjoy nature and scenery.
