* Image is for illustrative purposes only.Maebashi Castle (Umayabashi Castle)
前橋城（厩橋城）
Maebashi Castle (Umayabashi Castle) is a historic castle in Kantō dating from the Founded in the Eikyō era (1430s); developed as seat of Maebashi Domain under the Sakai clan in the Edo period, whose lord was Nagano clan / Hōjō clan / Uesugi Kenshin (control) / Sakai clan.
Overview
Maebashi Castle, also known as Umayabashi Castle (厩橋城), is a flatland water castle located in Maebashi City, Gunma Prefecture. Built on low ground along the Tone River, it is characterized by strategic use of the river in its fortification layout. During the Sengoku period, it became the focal point of contested battles between the Hōjō and Uesugi clans as a key stronghold of Northern Kantō. It gained particular fame when Uesugi Kenshin used it as a base during his repeated campaigns into the Kantō region.
The castle's origins trace to around Entoku 1 (1489) during the Muromachi period, when the Nagano clan built a residence along the Tone River. Subsequently, as the power of the Kantō Deputy Governors (Uesugi clan) declined during the Sengoku period, the castle fell under the control of the Later Hōjō clan as they advanced their dominion over the Kantō region.
Uesugi Kenshin repeatedly campaigned into the Kantō during the Eiroku era (1558–1570), utilizing Umayabashi Castle as a vital stronghold in Northern Kantō. After Kenshin's death, the castle returned to Later Hōjō control; however, following the Hōjō's fall during Toyotomi Hideyoshi's Odawara Campaign (1590), Tokugawa Ieyasu's senior retainer Hiraiwa Chikayoshi became castle lord.
During the Edo period, the Sakai clan assumed the role of castle lord and conducted major renovations to make it the main castle of Maebashi Domain. However, the castle was progressively lost to erosion of the Tone River, forcing its relocation to Kawagoe Castle (Saitama) in Meiwa 4 (1767). In the Meiji era, it returned to Maebashi, and after being abandoned, it was developed into "Maebashi Park"; however, few structural remains have survived.
Today, Maebashi Park retains fragments of former stone walls and earthen ramparts that evoke the castle's former appearance, along with a commemorative monument. The "Maebashi Castle Site" marker conveys the scale of the former fortress.
Connection to Swords
The historical connection between Maebashi Castle and Japanese swords is epitomized by its relationship with Uesugi Kenshin, renowned as the Sengoku period's mightiest sword-wielding daimyo. Kenshin entered the battlefield as an "avatar of Bishamonten," and his martial prowess surpassed that of his contemporaries. The fact that Kenshin utilized Umayabashi Castle as one of the primary bases for his Kantō campaigns demonstrates that this castle occupied a central position within the highest echelon of Sengoku martial culture. Uesugi Kenshin was also renowned as a collector of swords, amassing fine blades from renowned sword-producing regions including Bizen, Yamashiro, and Soshu. He established the foundation of what later became known as the "Uesugi family's thirty-five selected swords"—a celebrated collection of named blades. Documents suggest that Kenshin brought prized swords to Umayabashi Castle during his Kantō campaigns; extant swords transmitted as "Kenshin's personal swords" include pieces connected to these military expeditions. Swords that Kenshin wielded during the Kawanakajima battles (1553–1564) against Takeda Shingen are sometimes linked to celebrated works such as Mikazuki Munechika (now in the Tokyo National Museum), though scholarly debate continues regarding his actual swords. Kenshin's swords were transmitted through the Uesugi lineage and are presently preserved in the Uesugi Museum in Yonezawa (Yamagata Prefecture). The Sakai clan lords of Edo-period Maebashi, who held the prestigious post of rōjū (senior councilor), formed a collection of swords including tachi and uchigatana presented by the shogun. The Maebashi Municipal Library and Gunma Prefectural History Museum house related martial equipment and materials associated with Maebashi Castle and the Sakai family.
Highlights
- Maebashi Castle Ruins Stele — monument marking the castle site within Maebashi Park
- Stone wall and earthwork fragments — surviving remnants of the castle's defenses
- Maebashi Park — civic park occupying the castle grounds with Tone River views
- Uesugi Kenshin historical site — battlefield-approach base used by the legendary warlord
- Gunma Prefectural History Museum (nearby) — regional samurai culture and arms collections
- Tone River natural moat — the waterway that defined the castle's defensive geography
* Opening hours and admission fees are subject to change. Please check the official website before visiting.