Phantom Sasashita Castle

Do you believe that there was a castle in Sasashita?
The castle, which is said to be the phantom Sasashita Castle, is a castle from the Warring States period built around the hill near Seijuin today.
However, before the investigation was conducted, he was immersed in the wave of Yokodai's development, so he did not know the details in detail, so it was said to be a phantom castle.
It is said that this castle was built by Nobumoto Mamiya Buzen Mamiya, who served Hojo Odawara.
In the old days, it was also called Shinosu Castle and Sasaki Castle. Near here, you can see things like Kurabori, Mizubori, and dog running.
Looking around from Sugimoto (Sasashita 4-chome), there were mountains and valleys, and between them there were rivers flowing between them.
The use of such natural terrain is also called Yamashiro of "Yatsu Setting".
In addition, Hinokawa to the north, Sasa Shimokawa to the east, Sasa Shimokawa tributary to the south, and there is a steep mountain on the west side. In the event of an emergency, I was able to contact the Tamanawa area where Ofuna was located.
After Nobunaga Oda built Azuchi Castle, in the Azuchi-Momoyama period and the Edo period, beautiful castles with a castle tower towering on flat ground came to be built, but before that, using such natural terrain, It was normal to build a fort.
In that era, when there was no battle, the life of a warlord who had to protect the castle was carried out in a place called Jinya.
It is thought that Mamiya's Jinya was located on a flat ground carrying a mountain, west of the current "Yokodai Entrance".
"What kind of samurai group is the Mamiya clan?"
I often get such a question.
There are so many topics about Sengoku warlords representing Yokohama, so I would like to take a few briefly.
At the beginning of the Warring States period, Soun Hojo fought against Uesugi Yamauchi and Uesugi Ogigayatsu Uesugi, who ruled the Kanto region at that time.
And he had a soldier in a fort called Gongenyama, which was near Yokohama Station. Ryo Uesugi attacked Mt. Gongen with a large army of 20,000.
At this time, from the fort, a warrior named Mamiya wore a very flashy armor and put a small flag called a cap on the front of the helmet, and hit the enemy camp.
On the shade seal, the "fourth knot", the emblem of Genji Sasaki, appears, and it seems that it fluttered in the beach breeze was very brave.
The warriors who protect the castle
"Don't sing Mamiya, don't sing Mamiya."
It was said that it was a fierce battle.
After this battle, Mr. Mamiya seemed to have been recognized by Hojo Odawara, and he was at the forefront of Soun Hojo's advancement to Sagami as the leader of the Sagami Shu 14 Family.
And in order to meet Mr. Ryouesugi, Nobumori Mamiya built a museum in a place called Horinouchi, near the current Keikyu Kawasaki Station.
However, Uesugi gradually lost his power and retreated to the northern Kanto area, Nobumori's child, Nobumoto, moved to Sasashita.
The reason is that at that time, Satomi, who was in Boso (now Chiba Prefecture) grew stronger, especially the navy often landed along the coast of Kuraki-gun, such as Kanazawa and Isoko. Because it came.
The repel of Satomi was important for Odawara Hojo.
In addition to Honjo, Mamiya, who moved to Sasashita, set up Sugita Jinya, Mori Jinya, Hitorizawa Jinya, and Matsumoto Castle at Nakatodaidai, Konan Ward.
As a result, the Satomi Navy is no longer attacking.
As the times pass, Hojo Odawara is destroyed by Hideyoshi Toyotomi's unification of the world.
However, at this time, the Mamiya clan's battle to protect the Yamanaka Castle in Hakone was so beautiful, so Ieyasu Tokugawa, the attacking army, took up many things from Mr. Mamiya who remained in Sasashita as a vassal. Was.
In the later world, there were many fine people from their families, such as Rinzo Mamiya, who discovered the Strait of Mamiya, and Genpaku Sugita, who first introduced Dutch medicine to Japan.

This is a story recorded in "Hometown Konan's Old Story".
Each folk tale is free to use in principle only for non-commercial purposes.
For more information, please contact the Konan History Council.
Konan History Council homepage (outside site)