* Image is for illustrative purposes only.Nanao Castle
七尾城
Nanao Castle is a historic castle in Chūbu dating from the Founded around the Ōei era (1394–1428), whose lord was Hatakeyama Yoshifusa / Uesugi Kenshin (captor).
Overview
About the Castle
Nanao Castle, built on Castle Mountain (approximately 300 m elevation) in Nanao City, Ishikawa Prefecture, is a renowned mountain fortress (yamashiro) of Noto Province and boasts one of Japan's most impressive medieval castle ruins of grand scale. According to tradition, it was founded around the Eikyo era (1394–1428) by the Hatakeyama clan, guardians of Noto, and subsequently served as the Hatakeyama residence for approximately 150 years, becoming the strategic center controlling the entire Noto Peninsula. The name "Nanao" (Seven Tails) is said to derive from the castle's use of seven ridges—Matsuo, Takeo, Umeo, Kiikuo, Hitoo, Ryuo, and Toro—in its construction, with a layout that maximized the Noto Peninsula's natural geography of sea and mountain, making it an impregnable stronghold that frustrated many Sengoku warlords.
Uesugi Kenshin's Siege
Inseparable from the history of Nanao Castle is the involvement of Uesugi Kenshin, the "Tiger of Echigo." In Tensho 4 (1576), Kenshin initiated his invasion of Noto and besieged Nanao Castle. Protected by natural fortifications, the castle resisted Kenshin's assault forces, but during the prolonged siege an epidemic broke out within the castle, the young lord Hatakeyama Haruo-maru died of disease, and internal conflict erupted when the pro-Uesugi Yusa Tsugumitsu turned against pro-Oda factions led by Chou Tsugitsura and others. In Tensho 5 (1577), September, weakened by internal strife, Nanao Castle finally fell to Kenshin. Immediately following this victory, Kenshin is said to have composed his celebrated poem "Shimo Man Gun'ei ni Michite Aki Ki Kiyoshi" ("Frost Fills the Army Camp, Autumn Air Clear")—dated "The Thirteenth Night of September, Composed in the Camp." The full poem reads: "Frost fills the army camp, autumn air is clear / Several lines of wild geese pass, the moon at the third watch / I have gained both Echigo and Noto's landscape / Whatever may be—a man's fortune lies in the making of his name." This poem is honored in posterity as a masterpiece crystallizing Kenshin's life philosophy and military glory.
Scale and Structure of the Castle
Nanao Castle is a complex mountain fortress composed of multiple baileys including the Honmaru (main enclosure), Ninomaru (second enclosure), Sannomaru (third enclosure), and the Yusaya residence, covering a substantial total area. Stone walls, moat ditches (horikiri), and earthen ramparts (dorui) survive in good condition, making it an essential historic site for the study of medieval mountain-fortress architecture. From the summit, panoramic views unfold across Nanao Bay and the Noto Peninsula's beautiful coastal landscape; on clear days, the majestic chain of Noto's mountains stretches across the horizon. Positioned at the tip of the Noto Peninsula facing the rough Japan Sea, this castle embodies the accumulated history of Northern Honshu daimyo and possesses a unique, solitary beauty incomparable to distant mountain fortresses.
Hatakeyama Culture and Craftsmanship
The Noto Hatakeyama clan, renowned for both military prowess and as patrons of the arts, brought cultural flourishing to the region. Particularly during the era of Hatakeyama Yoshisou, Noto achieved such cultural splendor that it was called a "Little Kyoto of the Provinces," witnessing the flowering of court culture including Noh theater, the tea ceremony, and linked verse poetry (renga). This cultural foundation influenced aesthetic sensibilities toward the sword, deepening understanding of the Japanese blade as an artwork transcending mere functional weaponry. Today, the Nanao Castle ruins are protected as a National Historic Site with developed hiking trails. A historic park has been established in Nanao City's town center, welcoming visitors as a hub where they can experience both Noto's natural beauty and history.
Nanao's Culture and Present
Nanao is known as the "Little Kyoto of Noto," a city of culture, where distinctive food culture—Noto oysters, Noto pufferfish, and others—and traditional crafts such as lacquerware and wax candles continue to thrive. A journey combining the Nanao Castle ruins with the port town's cultural heritage offers a luxurious itinerary condensing the rich history and culture of the Noto Peninsula. The 2024 Noto Peninsula Earthquake caused severe damage to Nanao City, yet the local community continues recovery efforts centered on the transmission of history and culture.
Connection to Swords
The story of Nanao Castle and Uesugi Kenshin provides essential historical context for understanding Japanese sword culture and the spirituality of Echigo warlords. Uesugi Kenshin, celebrated in later generations as "the General of Righteousness" and "the Military God," was a Sengoku warlord whose forces wielded swords that embodied the complex sword-making cultures of Echigo, Kaga, and Noto. Echigo (Niigata) had long been known as a production center for "Echigo-mono" swords, and swordsmiths under Kenshin's command forged practical blades in an environment blessed with a harsh climate and rich iron deposits. Kenshin's treasured blade, known as "Sanchōmō" (山鳥毛), is an unsigned masterpiece of the Bizen Fukuoka Ichimonji school, celebrated for its beauty — its blade pattern described as possessing "delicate hamon resembling bird feathers" — a testament to Kenshin's deep appreciation of sword aesthetics. Sanchōmō was purchased by Setouchi City, Okayama for approximately 500 million yen and made its homecoming in Reiwa 2 (2020). The Hatakeyama clan, who ruled Nanao Castle, were culturally refined daimyo who patronized Noto swordsmiths. The Noto smiths formed part of the broader Hokuriku sword culture, spanning Echizen, Kaga, and Noto — three provinces comprising a unified sword-making region. Kaga (southern Ishikawa) flourished under Edo-period Kaga Maeda clan rule, developing a distinctive "Kaga-uchi" sword culture. After the conquest of Nanao Castle, Uesugi Kenshin brought this rich sword culture zone under his dominion. The Nanao City Museum and Ishikawa Nanao Museum, situated near Nanao Castle ruins, display cultural artifacts from Noto and Kaga, and preserve sword-related materials alongside crafts from the Hatakeyama cultural tradition. Standing at the castle ruins overlooking Nanao Bay, gazing upon the rough waves of the Japan Sea while recalling a poem composed by Uesugi Kenshin, one senses the spirit of "Righteousness" — embodied by the Sengoku warlord wielding his blade — still lingering in the air.
Highlights
- Nanao Castle ruins — extensive郭 remains and stone walls of the medieval mountain fortress
- Panoramic view of Nanao Bay from the summit
- Site associated with Kenshin's famous autumn poem
- Ishikawa Prefectural Nanao Art Museum — Hatakeyama cultural artifacts
- Noto Food Festival Market (Nanao Port) — local seafood specialties
* Opening hours and admission fees are subject to change. Please check the official website before visiting.