Yamagata Castle

Yamagata Castle (山形城, Yamagata-jō) is a flatland-style Japanese castle located in the center of the city of Yamagata, eastern Yamagata Prefecture, Japan. Throughout the Edo period, Yamagata Castle was the headquarters for the daimyō of Yamagata Domain. The castle was also known as "Ka-jō" (霞城). The castle grounds are protected as a National Historic Site by the Japanese government.

The Yamagata Basin is a long and narrow inland valley of the Mogami River bounded by the Ōu Mountains to the east. It is an important communications center for the southeastern portion of the Tōhoku region of Japan, connecting the Shōnai Plains and the Sea of Japan to the west with the Yonezawa Basin to the south, and the Sendai Plains and the Pacific Ocean across the Ōu Mountains. In addition to riverine traffic, the route of the Ushū Kaidō highway also passes through the area. Yamagata Castle is located at the southern end of the Yamagata Basin.

The first castle on this site dates to the middle of the Muromachi period, when Shiba Kaneyori established himself as lord of the surrounding area of Dewa Province and built a fortified residence on the site of what is now the inner bailey of Yamagata Castle. The Shiba clan was a strong supporter of the Ashikaga shogunate and the Northern Court. Shiba Kaneyori later changed his surname to "Mogami", and the Mogami clan continued to rule for about 275 years. However, by the Sengoku period, the Mogami had lost much of their power due to a succession of internal conflicts and short-lived leaders. The aggressive Date clan invaded Mogami territory and after a series of battles, reduced the Mogami to a subordinate position.

However, the Date clan itself then fell victim to internal political conflicts. Taking advantage of the situation, Mogami Yoshimori regained his independence, and married his daughter to Date Terumune. Their son was Date Masamune, and this relationship provided security for the Mogami clan.

Mogami Yoshimori's eldest son, Mogami Yoshiaki fought many battle against various cadet branches of his own clan as well as the local warlords of many strongholds across Dewa Province from his base at Yamagata, with the Date clan sometimes assisting, but more often hindering his efforts to unit the province.

Text adapted from “Yamagata Castle” on Wikipedia, CC BY-SA 4.0.

Yamagata Castle ranks #1,566 of 7,738 worldwide in the atlas's castle fame ranking, and #90 of the 297 mapped in Japan. Founded 1357, it is older than 57% of the atlas's dated landmarks — one of 582 atlas entries founded in the 14th century. Its Wikipedia articles were opened 3,628 times in the last 60 days, more than 79% of the atlas. 1 more atlas landmarks stand within 25 km. See how Japan compares in the castle statistics.

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