Minowa Castle

Connection to Swords

Minowa Castle's sword heritage is embodied in two of Japanese history's most visually distinctive warrior traditions: the "Red Arms" of Takeda Shingen's elite force and the "Red Arms" of Ii Naomasa that succeeded them. Ii Naomasa — Minowa's final lord before his transfer to Hikone — commanded the legendary "Ii Red Arms" (Ii no Akabisori), a unit distinguished by their all-scarlet-lacquered armor. This tradition was consciously inherited from the Takeda "Red Arms" of Yamagata Masakage, destroyed at Nagashino. The Ii family's adoption of the defeated Takeda's signature was a statement of martial lineage — and the swords and armor of the Ii tradition, now preserved at Hikone Castle Museum, trace their aesthetic roots to the martial culture that once governed Minowa. Some of the finest pieces in the Ii collection are associated with Naomasa's campaigns conducted while he was lord of Minowa. Takeda Shingen himself was a significant sword patron. Blades traditionally attributed to Shingen's personal use survive in several institutions, and Shingen's domain — encompassing the gold mines of Kai and the iron-producing districts of Shinano and Kōzuke — was organized for systematic military production. Minowa Castle, as Shingen's Kōzuke headquarters, was part of this system: a supply node for blades and armor serving the Takeda military machine in its easternmost deployment zone. The repurposing of Minowa's timber for Hikone Castle — a tradition preserved in both cities — is itself a metaphor for the transmission of warrior culture: just as famous swords pass from lord to lord carrying their history, the physical fabric of the castle was carried from the site of one warrior's domain to become part of another's lasting monument. For students of the Japanese sword, Minowa offers a direct material link between the Takeda era's peak and the Ii clan's enduring contribution to Japanese martial aesthetics.