# Karasawa Castle

- **Country:** Japan
- **Coordinates:** 36.353800, 139.600300
- **Location Text:** Sano, Tochigi

Karasawayama Castle, located on a 247-meter ridge in Sano, Tochigi Prefecture, stands as a prominent example of yamashiro-style mountain fortification in Japan. Traditionally founded in 927 AD by the legendary Fujiwara no Hidesato, the site served as a strategic stronghold for the Sano clan for centuries. Although early historical documentation is sparse until the late fifteenth century, the castle was extensively rebuilt in 1180 and again in 1491. Its elevated position overlooking the northern Kanto Plain earned it a reputation among contemporary writers as one of the seven most secure fortresses in the entire region, making it a critical defensive point during Japan's feudal era.

The castle played a pivotal role during the turbulent Sengoku period, particularly in the power struggles between the Uesugi and Hojo clans. The famous warlord Uesugi Kenshin targeted the fortress multiple times to secure supply lines to his allies, launching three failed assaults before finally forcing the surrender of Sano Masatsune in 1563. However, Kenshin's hold on the area remained tenuous due to threats from the rival Takeda clan, leading to repeated revolts by the Sano family immediately after his forces withdrew. These dramatic sieges highlight the castle's enduring military significance and the resilience of its defenders against overwhelming odds.

Demolished in 1602 following the unification of Japan under the Tokugawa shogunate, the site today exists as well-preserved ruins. The inner bailey now houses the Karasawayama Shrine, blending spiritual heritage with military history. Recognized for its cultural value, the location was designated a National Historic Site of Japan in 2014. Currently open to the public, the ruins offer visitors a chance to explore the remnants of this once-impenetrable mountain castle while enjoying the scenic views that once made it such a formidable tactical asset.

![Photo of Karasawa Castle](http://commons.wikimedia.org/wiki/Special:FilePath/Karasawayama%20Shrine.JPG)

**Source:** https://en.wikipedia.org/wiki/Karasawa_Castle (Wikipedia, CC BY-SA)