Ichinomiya Castle (Kazusa)[The feature on the castles; Japanese history]

一宮城(上総)/アクセス・場所・地図 里見氏重臣の正木一族の支城 上総一宮城 【お城特集 日本の歴史】

[Castle name]
Ichinomiya castle
the sub-castle of Mr. Masaki

Ichinomiya Castle is a flatland-mountain castle located in Ichinomiya, Nagasa Gun, Chiba Province. The castle built year can be dated back to the South and North Dynasties, but details are unknown.
During Sengoku Era, this area was ruled by Mr. Masaki who belonged to Mr. Satomi. Eiroku 6 year (1563), the conflict between Mr. Hojo and Chiba, and the joint army of Mr. Satomi and Mr. Outa broke out, Mr. Satomi was greatly defeated the the Second Kokufudai Joint Battle.

一宮城(上総)/アクセス・場所・地図 里見氏重臣の正木一族の支城 上総一宮城 【お城特集 日本の歴史】

After this battle, Mr. Masaki was divided, [Masaki Tokitada] who was the castle owner of Otaki Castle and belonged to Mr. Hojo, attacked [Ichinomiya Castle] which was ruled by [Masaki Noritoki] who belonged to Mr. Satomi, Tokitada’s son [Masaki Tokimichi] became the castle owner.
At that time, Mr. Masaki ruled Otaki Castle, Katsuura Castle and Ichinomiya Castle and being independent from Mr. Satomi. After that, when Hojo Ujimasa focused on the battle with Takeda Shingen in Suruga, Mr. Masaki did not get the reinforcement from Mr. Hojo. Therefore, they were back to Mr. Satomi again.

一宮城(上総)/アクセス・場所・地図 里見氏重臣の正木一族の支城 上総一宮城 【お城特集 日本の歴史】

Tensho 18 year (1590), when Hojo Battle started, [Satomi Yoshiyasu] was in good relationship with Hideyoshi, when attacking Miura Island his personal action caused damage to Hideyoshi. Therefore, part of his territories in Kazusa were forfeited.
Hideyoshi already noticed the whole country that independent battle was not allowed, therefore for that reason Yoshiyasu got punished. (There are several versions) Because of that, Shimosa and Kazusa faced into confusion, Tokugawa Ieyasu appointed [Honda Tadakatsu] as the general officer and occupied a few castles.

一宮城(上総)/アクセス・場所・地図 里見氏重臣の正木一族の支城 上総一宮城 【お城特集 日本の歴史】

Ichinomiya Castle was also one of the castles fell down, and it became abandoned. The castle remainings have nothing left on the current castle ruins. In addition, Bunsei 9 year (1826), in order to prepare for Edo harbor, [Kano Hidatomo] decided to move the clan office to Ichinomiya, and built Jinya on Ichinomiya Castle.
After that, it was used as the clan office of Ichinomiya Clan until Meiji Period. And it was abandoned again.

〒299-4301 3435 Ichinomiya, Nagasa Gun, Chiba Province


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