タグ: Hojo clan

119.Sugiyama Castle Part1

A castle which has both an advanced defense system and a mysterious history

Location and History

Simple but Popular Castle

Sugiyama Castle was located in Hiki District, what is now in the western part of Saitama Prefecture. The ruins of the castle recently became popular among history fans in Japan. The ruins are not so large and have no buildings and no stone walls. The ruins are all made of soil. In addition, it is also uncertain when and who built and used the castle. There are no clear records about the castle at all. So, what did the castle become famous for? The answer is that the castle had a surprisingly artful defense system for such a small local castle.

The location of the castle

“Sugiyama Castle Problem”

Historians have tried for a long time to find out when and who built Sugiyama Castle. However, their conclusions became more complicated. When the excavation team researched the castle ruins, they thought the castle was built and used around early 16th Century based on the unearthed relics. The Uesugi Clan, which governed the Kanto Region, had internal conflicts in the area around the castle at that time. The team speculates the clan built the castle. On the other hand, the researchers who study the layout of castles argue that the complex defense systems like Sugiyama Castle should have appeared later, such as in the late 16th Century. They think the Hojo Clan, which governed the Kanto Region after the Uesugi Clan, must have built such an advanced defense system. People call this discussion “Sugiyama Castle Problem”. The problem might even make the castle more popular.

The family crest of the Uesugi Clan called the Uesugi Bamboo Grass (licensed by Mukai via Wikimedia Commons)
The portrait of Ujityasu Hojo, the lord of the clan in the 16th Century, owned by Odawara Castle (licensed under Public Domain via Wikimedia Commons)

“Textbook for Building Castles”

Sugiyama Castle was built on a hill. The hill measured 42m high from the base. The castle had 10 enclosures, including one in the center of the castle. The enclosures spread into three directions in the south, north and east. These enclosures were built to protect the center of the castle called the Main Enclosure. The west of the castle was a steep cliff with a river flowing below, which was a natural hazard. All the enclosures were surrounded by earthen walls and dry moats and connected by earthen or wooden bridges. The most important feature of its defense system was that all the entrances of the enclosures were protected by the frank attacks or Yokoya. Protection was provided by the clever layout of the L-shaped earthen walls and the route to the enclosures. The design of the castle was highly sophisticated, so it is now often called “a textbook for building castles”.

The miniature model of the castle ruins, exhibited in the Ranzan Town Office

Castle may be Temporary

The excavation found that Sugiyama Castle didn’t have permanent buildings such as halls, turrets, and gates. It probably only had temporary buildings like huts and fences. It was also found that the castle was used for a short time because it was not modified before it was destroyed by fire. This means that the castle could have been built for a single purpose or battle. There were many other castles around Sugiyama Castle, which were also built probably for a single purpose. Many of these castles, such as Ogura Castle, had distinct features. Many battles happened around this area in the 16th Century during the Sengoku Period. It is thought that the warlords in this area built residential castles as well as single-use castles to survive. Even though Sugiyama Castle may have been one of the latter, it had a surprisingly technical defense system.

The whole view of Sugiyama Castle Ruins, from the signboard at the Ranzan Town Office
The ruins of Ogura Castle, this castle has stone walls which were rare in the Kanto Region when it was built

To be continued in “Sugiyama Castle Part2”

125.Kozukue Castle Part1

The castle in the center of the popular Kozukue Territory

Location and History

Castle along one of Kamakura Roads

Kozukue Castle was located in what is now the northern hilly area in Yokohama City, Kanagawa Prefecture. In the present Japan, Tokyo is the center of Japan including the Kanto Region. For that reason, many major roads gather in or spread from Tokyo. Some of them also go through the eastern seaside area of Yokohama City. However, before the Edo Period which started in the 17th Century, the center of the Kanto Region was Kamakura, called the Warriors’ Capital. Many major roads, called the Kamakura Roads, at that time also gathered in or spread from Kamakura. Kozukue Castle was near one of the Kamakura Roads and alongside Tsurumi-gawa River, which was an important spot for transportation.

The location of the castle

The present road network of the Kanto Region going to and from Tokyo (Source: Ministry of Land, Infrastructure and Transport)
The past road network of the Kanto Region going to and from Kamakura (Source: Tama City, adding the positions of Kozukue Castle and Kamakura)

“Kozukue Territory” and “Kozukue Group”

It is uncertain when Kozukue Castle was first built. The first appearance of the castle was after the Rebellion of Kageharu Nagao, who was against his master, the Uesugi Clan in 1478. The Toshima Clan who supported Kageharu used the castle, and Dokan Ota, a senior vassal of the Uesugi Clan beat them. After a while, the Hojo Clan, a great warlord used the castle again as a bridgehead for invading the Kanto Region in the 16th Century during the Sengoku Period. Even after the Hojo Clan was succeeded, they still considered the area around the castle as one of their important territories. They called the area “Kozukue Territory” like we call the area today, Yokohama City. They also called the group of the warriors who lived in the area “Kozukue Group”. Kozukue Castle was the center of the area and the group, and one of Hojo’s branch castles, which must have been more popular than we assume.

The portrait of Dokan Ota, owned by Daijiji Temple (licensed under Public Domain via Wikimedia Commons)
The portrait of Ujitsuna Hojo, the lord of the clan when they invaded the Kanto Region, owned by Odawara Castle (licensed under Public Domain via Wikimedia Commons)

Castle has Simple Layout

Kozukue Castle was built on the edge of a hill sticking out from the south towards Tsurumi-gawa River to the north. The layout of the castle was simple, having the large Western and Eastern Enclosures, divided by the slender Connecting Enclosure. They were all made of soil. However, these enclosures were surrounded by large deep dry moats. What kinds of buildings stood on the enclosures is still uncertain, but it is thought that some turrets were built on the earthen bases. In addition, some barbicans were built along the hill around the main portion.

The relief map around the castle

The imaginary drawing of Kozukue Castle (from the signboard at the site, adding comments)

Development and Abolition of Castle

In 1590, when the ruler, Hideyoshi Toyotomi invaded Hojo’s territory for his unification of Japan, Hojo ordered their branch castles to gather the warriors to their home base, Odawara Castle. That meant the branch castles including Kozukue Castle had to protect themselves with fewer defenders. The lord of Kozukue Castle decided to draft farmers to protect it. It is thought that the dry moats of the castle were also developed making them larger and deeper to protect the castle with fewer warriors and untrained defenders. This is what we can now see as the ruins of the castle. However, no battles happened then. The castle was open and finally abandoned after Hojo surrendered to Hideyoshi.

The Portrait of Hideyoshi Toyotomi, attributed to Mitsunobu Kano, owned by Kodaiji Temple (licensed under Public Domain via Wikimedia Commons)
The dry moat of Kozukue Castle

To be continued in “Kozukue Castle Part2”

32.Kasugayama Castle Part1

The castle of Kenshin Uesugi, the strongest warlord

Location and History

Kenshin Uesugi, Warlord who respected Justice

Kasugayama Caste was located in Echigo Province (what is now Nigata Prefecture), facing the Japan Sea. The castle is well known for one of its lords, Kenshin Uesugi. Kenshin is said to be the strongest warlord in the 16th Century during the Sengoku Period. While he fought over 70 battles during his 49-year life, he suffered no obvious defeat.

The location of the castle

The portrait of Kenshin Uesugi, owned by the Uesugi Shrine (licensed under Public Domain via Wikimedia Commons)

Kenshin also had very unique perspectives which other warlords never had. He never fought to invade other provinces by himself. He only fought with the help of others who were defeated by another warlord. As a result, he fought with a great warlord, Shingen Takeda 5 times on the south of his province. He also went over the mountains to the Kanto Region facing the Pacific Ocean to fight with the Hojo Clan as many as 17 times. Kenshin was a devout Buddhist, remained single all his life, and prayed for victory at the Bishamon-do Hall several days before his battles. He once escaped from the castle and tried to become a Buddhist priest, but his retainers urged him to go back to the castle until he gave up trying to become a priest.

The statues of Shingen Takeda (on the left) and Kenshin Uesugi (on the right) at the Kawanakajima Battlefield (licensed under Public Domain via Wikimedia Commons)
The restored Bishamon-do Hall

Despite Kenshin’s strength, he was not able to become a ruler. Every time he withdrew from a province after his win, his enemies got their territories back. He is sometimes criticized by historians. However, many history fans still love him as a warlord who respected justice.

The flag of Kenshin Uesugi (taken by 松波庄九郎 from photoAC)

Castle covered with Enclosures and Buildings.

Kasugayama Castle was built using earthworks on an 189m high mountain beside the Kubiki Plain, the western part of Nigata Pref. It is uncertain when the castle was first built, but Tamekage Nagao, Kenshin’s father, improved the castle. The scale of the castle became larger in Kenshin’s period, and the mountain was covered with uncountable enclosures and buildings.

The old drawing of Kasugayama Castle  (licensed under Public Domain via Wikimedia Commons)

The castle consisted of three parts at that time. The main portion of the castle was on the top of the mountain with the front facing the plain on the east. It included the Main Enclosure, the Bisyamon-do Hall, a senior vassal Naoe’s Hall, and Halls for Kenshin’s two adopted sons, Kagekatsu and Kagetora. Next, the Main Route went up from the southeast foot of the mountain to the top. It was a long detour around the mountain, passing the guard house and other senior vassals’ halls such as Kakizaki. Lastly, the Back Route also went up from the northeast foot to Naoe’s Hall. It passed through the Kurogane-mon Gate, the Hall for the Lord, the Sengan-mon Gate and the alternate entrance called Koguchi.

The georama of Kasugayama Castle at Joetsu City Buried Cultural Property Center

The castle might not have had complex defense systems, but it had the network of the branch castles, such as Samegao Castle, to work together when a battle happened.

The network of the branch castles around Kasugayama Castle (Joetsu City Buried Cultural Property Center)

Abandoned at Peaceful Time

After Kenshin died in 1578, an internal battle unfortunately happened in the castle between Kagekatsu and Kagetora. Kagekatsu finally won, but he was transferred to Wakamatsu Castle by the ruler Hideyoshi Toyotomi in 1598. After that, the Hori Clan governed the castle, building the outer earthen walls called So-gamae to make the castle the largest. However, the clan moved to Fukushima Castle on the plain for convenience of governance in 1607. Kasugayama Castle was abandoned at the same time.

The portrait of Kagekatsu Uesugi, owned by Uesugi Shrine (licensed under Public Domain via Wikimedia Commons)
The restored outer earthen walls

To be continued in “Kasugayama Castle Part2”