* Image is for illustrative purposes only.Negijo
根城
Negijo is a historic castle in Tōhoku dating from the Founded in 1334 (Kenmu 1), whose lord was Nanbu Moroyuki / Nanbu Clan.
Overview
About the Castle
Negijo is a representative medieval fortress of northeastern Japan, built in 1334 (Kenmu 1) by Nanbu Moroyuki when he descended as Mutsu provincial governor while following Kitabatake Akiie amid the turmoil of the Northern and Southern Courts period. The Nanbu clan was a samurai family originating in Kai Province (modern Yamanashi Prefecture), acquired lands in Mutsu Province under orders from the Kamakura shogunate, took root in northeastern Japan, and thereafter ruled as dominant powers over the Nanbu region (present-day southern Aomori and northern Iwate prefectures) for an extended period. As the main stronghold of the Nanbu clan, Negijo continued to function throughout the Muromachi and Sengoku periods as a crucial center of politics and military affairs in northeastern Japan. The castle is a hirajiro (flatland fortress) type medieval stronghold situated in Hachinohe's urban area, with a layout featuring multiple compounds connected and defended by large earthen ramparts and dry moats.
Architecture and Structure
The distinctive feature of Negijo is its character as a pure medieval fortress composed solely of earth and wood, without the use of stone walls. The structure, with compounds such as the honmaru (inner citadel), chūkan (middle compound), sotomaru (outer compound), baba (grounds), and miscellaneous structures arranged east to west, represents a typical style of medieval northeastern castles that survives to the present day. Archaeological surveys conducted from the late Showa period into the Heisei era revealed post holes, hearth remains, wells, and traces of armories, and today major buildings have been reconstructed based on excavation findings. The restored main hall, workshop, blacksmith workshop, and stables have all been carefully recreated using 14th-century techniques and materials, making this historic site park one of Japan's rare facilities where visitors can experience the lived spaces of medieval samurai. Particularly noteworthy is the archaeological evidence of the excavated blacksmith forge, which confirms that metalwork for weapons, agricultural tools, and other items was conducted within the castle.
History of the Northern and Southern Courts and Sengoku Periods
Nanbu Moroyuki was a loyal retainer of the Southern Court who supported Kitabatake Akiie in the Ou region; in 1335 (Kenmu 2), leading Oshu forces, he accompanied Akiie's army heading toward Kyoto. Moroyuki was killed in battle alongside Kitabatake Akiie at the Battle of Ishizu in 1338 (Engen 3, in Izumi Province), and the Nanbu clan's position in northeastern Japan was inherited by his younger brother, Masanaga. The Nanbu clan subsequently survived as a major power in northern Mutsu, enduring through the turmoil of the Northern and Southern Courts period into the Sengoku age. During the Sengoku period, the Sannohe Nanbu branch rose as the main family, with a complex kinship relationship unfolding between them and the Hachinohe Nanbu (Negijo Nanbu). When the Negijo Nanbu merged with the Sannohe Nanbu in 1598 (Keicho 3), Negijo moved toward abandonment.
Samurai Culture of Northeastern Japan
The Nanbu region has long been renowned as a center of horse breeding, and the "Nanbu horse" was a superior breed that earned the highest evaluation as a war horse in Japan. This combination of horse-breeding culture and samurai culture made the Nanbu clan one of northeastern Japan's strongest military groups. The samurai of Nanbu, governing a vast territory under severe climatic conditions, cultivated a distinctive warrior culture that valued the spirit of practical hardiness, prioritizing utility over ornament. This spirit is also reflected in the tradition of practical craftsmanship exemplified by Nanbu ironware (Nanbu iron kettles).
Tourism and Experience
The Negijo historic site park (Hachinohe, Aomori) is designated as a National Special Historic Site and allows visitors to view restored buildings such as the main hall, workshops, and blacksmith workshop free of charge or for a modest fee. The adjacent Hachinohe City Museum offers detailed learning about Negijo and the history of the Nanbu clan, as well as an extensive collection spanning from Jomon culture through the modern era in northeastern Japan.
Connection to Swords
The blacksmith workshop at Negijo represents one of the most important archaeological pieces of evidence documenting the reality of sword and weapon production in medieval Japanese castles. Traces of forges, iron slag, and tools discovered through excavation testify to the daily manufacture and repair of weapons within the castle. Maintaining a blacksmith workshop within a medieval castle was a military necessity. To rapidly repair swords, spears, bows, and horse equipment damaged during campaigns, it was essential to have blacksmith craftsmen permanently stationed in the castle—a function that Negijo's workshop served precisely. To survive the intense warfare of the Northern and Southern Courts period, the Nanbu clan had to continually maintain a diverse arsenal of swords, bows, and spears. The forces commanded by Moroyuki and his successors have records of expeditions from the Ou region all the way to Kyoto, where the ability to carry weapons and conduct repairs during extended campaigns was literally a matter of life and death. Particularly noteworthy in the sword culture of the Nanbu region is the tradition of "Nanbu uchihamono" (Nanbu struck blades). Alongside the foundry techniques of Morioka and Mizusawa—for which Nanbu ironware is world-renowned—the blacksmith craftsmen of Nanbu were highly skilled in the manufacture of edged tools in general. Some scholars trace the origins of "Nanbu uchihamono" back to the castle blacksmith workshops of the Negijo era. Nanbu clan sword culture emphasized practical sharpness and durability over elaborate decoration, embodying a pragmatic aesthetic born from the severe climate of northeastern Japan and the practical combat experience of extended campaigns. The Hachinohe City Museum displays iron implements and weapons excavated from Negijo, which have attracted the attention of researchers and enthusiasts as valuable materials documenting the reality of medieval sword production. The reconstructed blacksmith workshop at Negijo is one of Japan's few facilities where visitors can experience the actual environment in which katana production functioned, making it an essential pilgrimage site for sword enthusiasts.
Highlights
- Reconstructed main hall, workshops, and blacksmith's forge — a medieval samurai living space recreated with 14th-century techniques
- Reconstructed blacksmith's workshop — a nationwide rare restored facility conveying the reality of sword and weapon production within the castle
- Historic site park — experience medieval castle fortifications and remains by walking through earthen walls and dry moats
- Hachinohe City Museum (adjacent) — displays of Nambu clan history, excavated artifacts from Nejō, and historical exhibitions from Jōmon through modern periods in northern Tōhoku
- Nambu ironware production center (Morioka) — the present state of Nambu blacksmith culture (approximately 2 hours by car)
- Tanesashi Coast and Black-tailed gull colony on Kabutojima Island — scenic spots in the Hachinohe area
* Opening hours and admission fees are subject to change. Please check the official website before visiting.