Ichijōdani Castle: A Complete Guide to its History and Highlights | A Sengoku Period Castle Town Ruins that Convey the Glory of the Asakura Clan
Ichijōdani Castle is a magnificent ruin located in Fukui City, Fukui Prefecture, where a Sengoku period mountain castle and castle town are integrated. Selected as one of Japan’s 100 Famous Castles and protected as a National Special Historic Site and Special Place of Scenic Beauty, this ruin conveys the vestiges of a splendid cultural city built by the Sengoku daimyo Asakura clan.
What is Ichijōdani Castle? | A Sengoku Period City Where a Mountain Castle and Castle Town are Fusion
Ichijōdani Castle refers to a comprehensive fortified city encompassing a mountain castle built on the summit of Ichijōjōyama (Ichijōyama) at an altitude of 473 meters, and the castle town that spreads out at its foot. Unlike typical castles, the entire valley, stretching approximately 5 kilometers from north to south, functioned as one massive fortress.
Defensive facilities called Kami-jido and Shimo-jido were established on the north and south sides of the valley, strictly controlling access to and from the valley. It is believed that at its peak, over 10,000 people lived in the space enclosed by this gate, and that it flourished as a city second only to Kyoto in size.
Structural Features of Ichijōdani Castle
Ichijōdani Castle on the mountaintop functioned as a fortified outpost in times of emergency, while in peacetime, government affairs were conducted at the Asakura Residence at the foot of the mountain. The Asakura Residence was surrounded on three sides by earthen ramparts, and further surrounded by a moat, creating a thorough defensive system.
The mountain castle section has a linear layout, with baileys such as Senjōjiki, Ichinomaru, Ninomaru, and Sannomaru arranged along the ridgeline. Particularly noteworthy are the more than 140 ridge-shaped vertical moats, believed to have been built in preparation for an invasion by Oda Nobunaga, demonstrating the most advanced defensive technology of the time.
The History of the Asakura Clan and Ichijōdani
The Asakura Clan’s Rule of Echizen and the Development of Ichijōdani
The Asakura clan established their base in Ichijōdani as the deputy governor of Echizen Province in 1471, during the time of Asakura Takakage (Toshikage). From then on, the Asakura clan ruled Echizen for 103 years across five generations, developing Ichijōdani into a political, economic, and cultural center.
When Kyoto was devastated by the Ōnin War (1467-1477), many court nobles, high-ranking priests, cultural figures, and scholars sought refuge in Ichijōdani. The Asakura clan actively welcomed and protected these people, causing Ichijōdani to grow into a cultural city known as the “Little Kyoto of Hokuriku.”
Successive Lords and the Prosperity of Ichijōdani
The first lord, Asakura Takakage (Toshikage), laid the foundation for Ichijōdani and established family precepts known as the “Asakura Takakage Articles” to control his retainers. This family precept is highly regarded as a set of laws governing a Sengoku-period daimyo’s domain.
During the time of the 5th lord, Asakura Yoshikage, Ichijōdani reached its peak. Yoshikage loved culture and the arts, and encouraged linked verse poetry and the tea ceremony. He also had deep connections with the central government, even temporarily welcoming Shogun Ashikaga Yoshiaki.
The Fall of Ichijōdani Castle | Oda Nobunaga’s Invasion of Echizen
In August of Tenshō 1 (1573), Oda Nobunaga began his invasion of Echizen. Asakura Yoshikage abandoned Ichijōdani and retreated to Ōno, but was ultimately forced to commit suicide. The Oda army set fire to Ichijōdani, and the once-prosperous castle town was reduced to ashes overnight.
suggestive, Ichijōdani Castle was abandoned without being used much in actual combat. Although the defensive structures of the mountain castle were well-maintained, the Asakura clan perished without ever holding out in the mountain castle.
Layout and Remains of Ichijōdani Castle
Structure of the Mountain Castle
Multiple baileys are arranged on the summit of Ichijōdani Mountain. The largest flat area, “Senjōjiki,” is, as its name suggests, a vast space, believed to have functioned as an emergency refuge and a storage area for supplies.
Main Bailey Groups:
- Senjōjiki: The largest flat area
- Ichinomaru: Functioned as the main bailey
- Ninokuruwa & Sannomaru: Arranged in a series of baileys
- Kannon Yashiki: One of the palace buildings
- Tonoi: A facility for security
These baileys are arranged along ridges and valleys, skillfully utilizing the natural terrain. Even today, remains such as dry moats, vertical moats, and ambush pits remain in good condition.
Ridge-shaped Vertical Moats | Cutting-Edge Defensive Technology
The most noteworthy remains of Ichijōdani Castle are the more than 140 ridge-shaped vertical moats. These moats are vertical trenches dug in a continuous pattern like ridges on a mountain slope, effectively preventing lateral movement of the enemy and dispersing their attacks.
Ridge-shaped vertical moats of this scale are rare nationwide and are believed to have been hastily constructed in response to the concrete threat of Oda Nobunaga’s invasion. As a valuable remains demonstrating cutting-edge castle construction technology from the late Sengoku period, they are attracting the attention of researchers.
Upper and Lower Gates | Checkpoints Protecting the Valley
Upper and lower gates were established as defensive facilities blocking the north and south sides of Ichijōdani. These were not merely gates, but strong defensive strongholds combining stone walls and earthworks.
The lower gate was located at the northern end of the valley and played a role in preventing incursions from the Fukui Plain. Even today, earthen ramparts and stone walls several meters high remain, allowing us to imagine the castle’s former grandeur.
Kami-kido was located at the southern end of the valley and controlled access to and from the Ōno area. The approximately 1.7-kilometer stretch between the two gates constituted the center of the castle town, where the Asakura residence, samurai residences, merchant houses, and temples were densely concentrated.
The Asakura Residence and Castle Town
Asakura Residence | The Asakura Clan’s Residence
The Asakura Residence was the central facility of Ichijōdani Castle, where the head of the Asakura clan resided and conducted government affairs. The approximately 6,000 square meter site was surrounded on three sides by earthen ramparts approximately 2 meters high, and further encircled by a moat approximately 10 meters wide.
Inside the residence, buildings such as the main hall, residence, and meeting hall were arranged, and a beautiful garden was also constructed. The Asakura Residence Garden is designated a National Special Place of Scenic Beauty, demonstrating the high aesthetic sensibilities of a Sengoku-period daimyo. ### Four Special Places of Scenic Beauty Gardens
Ichijōdani boasts four gardens designated as Special Places of Scenic Beauty, including the Asakura Residence Garden:
- Asakura Residence Garden: A garden attached to the residence of the clan head.
- Suwa Residence Garden: Attached to the residence of Asakura Yoshikage’s wife.
- Yudono Garden: A garden attached to a bathhouse.
- Nanyōji Temple Garden: The garden of the Asakura clan’s ancestral temple.
These gardens are full-fledged examples incorporating Kyoto garden design techniques, showcasing diverse styles such as pond gardens and dry landscape gardens. They are extremely important historical remains for understanding the garden culture of the Sengoku period.
Reconstructed Townscape | Experience Life in the Sengoku Period
Currently, a Sengoku period townscape has been reconstructed over approximately 200 meters in Ichijōdani. Based on the results of archaeological excavations, samurai residences, townhouses, and artisans workshops have been faithfully reproduced, allowing visitors to experience the lifestyle of the people of that time.
Highlights of the Restored Townscape:
- Samurai Residences: Reconstructions of the residences of middle-ranking samurai. Gardens and wells have also been restored.
- Townhouses: Residences and shops for merchants and craftsmen.
- Roads: Stone-paved roads and drainage ditches have been restored to their original state.
- Earthworks and Moats: Defensive structures that demarcated the town.
In the restored townscape, visitors can enter the buildings, and furnishings and daily life items are on display. It is a valuable facility that allows for a three-dimensional understanding of urban life during the Sengoku period.
Excavation and Preservation of the Ichijodani Asakura Clan Ruins
Miraculously Preserved Ruins
Ichijodani is extremely valuable from an archaeological perspective because it was never rebuilt as a city after being burned down by the Oda army. The castle town, reduced to ashes, remained buried in the earth and was preserved in a nearly untouched state for approximately 400 years.
Therefore, archaeological excavations have unearthed a large number of artifacts from the Sengoku period, including daily life tools, ceramics, weapons, and ornaments. The sheer volume of unearthed items is enormous, and many have been designated as Important Cultural Properties.
Designation as a Special Historic Site
In 1971, 278 hectares, including Ichijōdani Castle, were designated as a National Special Historic Site. Special Historic Sites are the highest rank of designation, limited to historical sites of particular importance, and there are only a little over 60 such sites nationwide.
In 1991, four gardens were designated as Special Places of Scenic Beauty, making Ichijōdani one of the few archaeological sites in Japan to possess both the distinction of a Special Historic Site and a Special Place of Scenic Beauty.
Fukui Prefectural Ichijōdani Asakura Clan Ruins Museum
In October 2022, a museum comprehensively conveying the value of the Ichijōdani Asakura Clan Ruins opened. It features exhibits based on the latest research findings and a full-scale reconstruction of the Asakura residence, making it a truly impressive site.
At the museum, you can see numerous important cultural artifacts excavated from the site up close, and there are also easy-to-understand explanations using videos and CG. When visiting Ichijōdani, it’s recommended to first understand the overall picture at the museum before exploring the ruins to enjoy it more deeply.
Ichijōdani Castle Highlights and Tourist Information
Must-See Spots
1. Reconstructed Townscape
The main highlight where you can experience a castle town from the Sengoku period. The cherry blossoms in spring and the autumn leaves are beautiful, allowing you to enjoy the scenery of each season.
2. Asakura Residence Site
The site of the residence where the head of the Asakura clan lived. Earthworks, moats, and garden remains, allowing you to experience the scale of the site in its heyday.
3. Karamon Gate
A gate reconstructed as the main gate of the Asakura Residence. It is a relocated gate from Shōun-in Temple, which is said to have been built by Toyotomi Hideyoshi to mourn the passing of Asakura Yoshikage.
4. Suwa Castle Ruins Garden
One of Japan’s Special Places of Scenic Beauty. The beautiful scenery of this pond-centered strolling garden is well-preserved.
5. Mountain Castle Climbing
For those confident in their physical fitness, climbing Ichijōjōyama is also recommended. The one-way trip takes about an hour, and from the summit you can enjoy a panoramic view of the Fukui Plain. You can also see remains such as ridged vertical moats.
Access Information
Location: Kido-no-uchi-cho, Fukui City, Fukui Prefecture
Access by Train: Approximately 30 minutes by Keifuku Bus “Ichijodani Asakura Express Bus” from JR Fukui Station, get off at “Ichijodani Asakura Clan Ruins Museum”
Access by Car: Approximately 10 minutes from Fukui IC on the Hokuriku Expressway
Free parking available (approximately 200 regular cars)
Opening Hours and Fees
Fukui Prefectural Ichijodani Asakura Clan Ruins Museum:
- Opening Hours: 9:00 AM – 5:00 PM (Last entry at 4:30 PM)
- Closed: Year-end and New Year holidays (December 29th – January 2nd)
- Admission Fee: General 700 yen, High school students 400 yen, Elementary and junior high school students 200yen
Reconstructed Townscape:
- Opening Hours: 9:00 AM – 5:00 PM (Last entry at 4:30 PM)
- Closed: New Year’s Holidays
- Admission Fee: 330 yen for adults, free for junior high school students and younger
*A combined ticket for the museum and the reconstructed townscape is also available.
Japan’s Top 100 Castles Stamp
Ichijodani Castle is selected as the 37th of Japan’s Top 100 Castles. The stamp can be obtained at the following locations:
- Fukui Prefectural Ichijodani Asakura Clan Ruins Museum
- South Entrance Ticket Office of the Reconstructed Townscape
Castle enthusiasts, please don’t forget to bring your stamp book.
Related Historical Sites Around Ichijodani Castle
Maruoka Castle
Maruoka Castle, located about 30 minutes by car from Ichijodani Castle, is one of the 12 remaining original castles and is also selected as one of Japan’s Top 100 Castles. Visiting it together with Ichijodani Castle is recommended.
Yohokan Garden
This is the garden of the Matsudaira family’s villa, the lords of the Fukui domain, and is designated as a national scenic spot. It is located in the city center of Fukui and is easily accessible.
Kitano-Sho Castle Ruins and Shibata Shrine
These are the ruins of Kitano-Sho Castle, built by Shibata Katsuie, a retainer of Oda Nobunaga. After destroying Ichijodani, Katsuie built a new castle on this site.
Points for Deeper Understanding of Ichijodani Castle
The Asakura Clan’s Cultural Policy
The Asakura clan’s cultural policy in Ichijodani was a strategic one, going beyond mere hobby. By protecting court nobles and cultural figures who had fledged Kyoto, the Asakura clan absorbed central culture and succeeded in elevating their status as a regional daimyo.
Leading cultural figures of the time, such as the renga poet Sogi, the court noble Sanjonishi Sanetaka, and the painter-monk Sesshu, visited Ichijodani and interacted with the Asakura clan. As a result, Ichijodani, despite being a regional city, boasted a cultural level comparable to Kyoto.
Archaeological Value
The archaeological value of the Ichijodani Asakura Clan Ruins is immeasurable. The preservation of a nearly complete urban structure from the Sengoku period is extremely rare in Japan.
Excavations have revealed detailed urban infrastructure, including roads, water and sewage systems, building foundations, gardens, and wells. Analysis of unearthed ceramics has also revealed that Ichijōdani was integrated into a nationwide trade network.
The discovery of products from diverse regions, including Chinese celadon and white porcelain, Seto and Mino pottery, and Echizen ware, attests to Ichijōdani’s economic prosperity and extensive trade relations.
Lessons from the Fall of the Asakura Clan
The fall of the Asakura clan left an important lesson for Sengoku daimyo. Even with cultural superiority, military and political misjudgments could lead to swift destruction. This was the reality of the Sengoku period.
Asakura Yoshikage refused Shogun Ashikaga Yoshiaki’s request to travel to Kyoto and continued to avoid conflict with Oda Nobunaga. This indecisive attitude is believed to have ultimately led to the Asakura clan’s downfall. ## Seasons and Photo Spots at Ichijodani Castle
Spring | Ichijodani with Cherry Blossoms and Fresh Greenery
From early to mid-April, Ichijodani is adorned with cherry blossoms. You can take beautiful photos of the contrast between the cherry trees along the reconstructed townscape and the cherry blossoms at the Asakura Mansion ruins, creating stunning images of the Sengoku period ruins.
Summer | Deep Green and Clear Stream
In summer, Ichijodani is enveloped in deep green. The gentle murmur of the Ichijodani River is refreshing, helping you forget the heat.
Autumn | Famous for Autumn Leaves
From late October to mid-November is the season for autumn leaves. The autumn foliage at the Asakura Mansion Garden is particularly magnificent, attracting many tourists. The hiking trails to the castle are also colored with autumn leaves, making it an excellent hiking season.
Winter | Fantastical Snowscapes
Fukui is known as a heavy snowfall area, and in winter, Ichijodani is covered in deep snow. The snow-covered reconstructed townscape is fantastical, creating a scene straight out of a historical drama.
Summary | The Charm of Ichijodani Castle
Ichijodani Castle, a magnificent ruin where a mountain castle and castle town are integrated, conveys the urban culture of the Sengoku period (Warring States period) to the present day. It boasts the history of the Asakura clan’s 103-year rise and fall over five generations, advanced castle construction techniques including over 140 ridged trenches, beautiful gardens designated as a Special Place of Scenic Beauty, and the opportunity to experience Sengoku-era life in the reconstructed townscape.
Ichijodani offers endless sights for history buffs, as well as those interested in architecture, gardens, and archaeology. The opening of the Fukui Prefectural Ichijodani Asakura Clan Ruins Museum has made even more enriching visits possible.
As one of Japan’s 100 Famous Castles, and a Special Historic Site and Special Place of Scenic Beauty, Ichijodani Castle is a historical site of the highest rank among Japan’s historical heritage. I recommend visiting this site, a relic of the Sengoku period, to experience the glory of the Asakura clan and the profound depth of Japanese history.
