By ando 
Karasawayama Jinja, located on the summit of Mt. Karasawa at an elevation of 240 meters in Sano City, Tochigi Prefecture, was once the main keep of Karasawayama Castle, renowned as “Kanto’s greatest mountain castle.” It is a place where the weight of history and a mysterious atmosphere linger. This time, we will introduce the many legends associated with this jinja, as well as its unexpected charms that soothe modern visitors.
Basic Information
Location: 1409 Fujicho, Sano City, Tochigi Prefecture
Enshrined Kami: Fujiwara no Hidesato-ko
History: Established in 1883 (Meiji 16) on the former site of Karasawayama Castle’s main keep. It was built by descendants of Hidesato-ko and former retainers of the Sano clan to enshrine their local hero.
Legendary Hero Fujiwara no Hidesato and the Centipede Extermination
Fujiwara no Hidesato, the enshrined kami, was a warrior of the Heian period also known as Tawara Toda. A very famous legend about him remains.
The story tells of how he granted the wish of a giant serpent (an incarnation of a dragon kami) lying across Seta no Karahashi Bridge in Shiga Prefecture. He brilliantly shot and exterminated a massive “great centipede” that coiled around Mt. Mikami seven and a half times, using an arrow tipped with his own saliva. For this feat, Hidesato received treasures from the dragon kami. He later quelled Taira no Masakado’s rebellion and became renowned as the progenitor of the samurai class.
Incidentally, there is a theory that the roots of the “Sato” surname, one of the most common in Japan, lie with Fujiwara no Hidesato (Sano’s Fujiwara = Sato). Thus, it can be considered a sacred place for all people named Sato nationwide.
Mysteries and Untold Stories Within the Castle Ruins
The Karasawayama Castle ruins, where the jinja stands, are dotted with mysterious spots that remain unexplained to this day.
Ooi no Ido (The Great Well): This is a mysterious well near the summit that has never run dry in over 1,000 years. It is said that when the castle was being built, prayers were offered to Itsukushima Daimyojin, and the well was discovered through a divine dream.
Kagamiiwa (Mirror Rock): This colossal rock face has an anecdote that its surface once shone like a mirror, reflecting so far that it revealed the castle’s defenses to enemies. To prevent this, it was intentionally charred with torches to make it cloudy.
Hiraishi no Yoroi (Arrow-Dodging Armor): This legendary armor is said to have been bestowed upon Hidesato by the dragon kami. As its name suggests, it was believed to possess the magical power to “evade incoming arrows” and is now carefully preserved as a treasure of the jinja (Nationally Designated Important Cultural Property).
A Sanctuary for Cat Lovers! Its Identity as a “Cat Jinja”
In recent years, Karasawayama Jinja has also garnered significant attention as a “cat paradise.” Dozens of cats live on the jinja grounds, calmly greeting visitors.
In fact, an old legend is connected to this. A “Cat Kami Legend” tells that when a monster rampaged in the castle town, a “white cat” living in the castle sacrificed itself to fight and protect the village. These cats, still carefully watched over by volunteers today, could truly be called modern-day guardian kami.
Anime Pilgrimage: “Kantai Collection -KanColle-”
For fans of the popular anime and game “Kantai Collection -KanColle-,” this is an unmissable sacred site.
The ship’s shrine for the former Imperial Japanese Navy heavy cruiser “Chokai” had its spirit divided from Karasawayama Jinja. For this reason, many “Admirals” (fans) still visit today, reflecting on their feelings for the ship girl Chokai. The jinja grounds also feature dedicated offerings and displays related to Chokai, allowing visitors to experience a unique atmosphere where history and subculture intersect.
Highlights for Your Visit
From the main hall on the summit, clear weather offers a panoramic view of the Kanto Plain, stretching to the distant skyscrapers of Shinjuku and the Tokyo Skytree.
Gaze upon the magnificent tall stone walls that retain the vestiges of the Sengoku period, reflect on the legendary hero, and be soothed by the cats. Karasawayama Jinja is truly a “power spot in the sky,” where a single visit allows you to encounter many stories.
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