Niwa Nagahide

Life and Background

Niwa Nagahide (1535–1585) was a military commander from the Owari Province who became one of Oda Nobunaga's most trusted senior retainers from his early service. He was known by the epithet "Kome Gorozaemon" (literally meaning "indispensable like rice, the five-man Gorozaemon [Nagahide's common name]"), which reflected Nobunaga's deep trust in him. He received treatment befitting Nobunaga's inner circle and played a major role in the clan hierarchy.

Supporting the Oda Regime

Beyond military prowess, Nagahide demonstrated exceptional abilities in administration, diplomacy, and civil engineering—a true versatile commander. From 1576 (Tenshō 4), he served as overseer of the construction of Azuchi Castle, bringing Nobunaga's ambitious vision to life as an actual fortress. He saw action in battles throughout the realm, earning battle honors including the subjugation of the Echizen Ikko-ikki uprising. After the Honno-ji Incident of 1582 (Tenshō 10), he allied with Hashiba Hideyoshi at the Kiyosu Conference against Shibata Katsuie, supporting Hideyoshi in the succession struggle within the Oda regime. Following the Battle of Shizugatake, he was granted Echizen Province and two districts of Kaga, becoming a great daimyo as lord of Kitanosho Castle. He died of illness in 1585 (Tenshō 13)—reportedly suffering from an internal tumor (seki-ju)—though the dramatic tale of him cutting open his own abdomen on his deathbed to send the tumor to Hideyoshi is considered apocryphal.

Swords and Weapons

Niwa Nagahide is known to have possessed three famous swords: the ō-wakizashi "Nikkari Aoe," the kodachi "Kannagiri Nagamitsu," and the wakizashi "Azamaru." First, "Nikkari Aoe"—an ō-wakizashi by Aoe Sadatsugu of the Bitchu Aoe school dating to the Nanboku-chō period (blade length approximately 60.3 cm, Registered as Important Cultural Property). After being owned by Shibata Katsuie, it passed through Katsuie's son Katsutoshi to Nagahide, then was presented to Toyotomi Hideyoshi, and finally came into the possession of the Kyogoku family of Marugame in Sanuki. The gold inlay inscription reading "Hashiba Goro-zaemon-no-jō Naga" on the blade is said to have been made by Nagahide's son Nagashige.

Second, "Kannagiri Nagamitsu"—a kodachi by Nagamitsu of the Bizen Osafune school from the Kamakura period (Registered as Important Cultural Property; currently housed in the Tokugawa Museum, associated with the Mito Tokugawa family). It is said to have been bestowed upon Nagahide through Rokkaku Yoshikata and then Oda Nobunaga. Third, "Azamaru," which is said to have been the sword of Fujiwara no Kagekiyo, a legendary warrior of the Heike clan, is associated with a tale that anyone who wears it falls prey to eye disease. Nagahide, after suffering such an ailment, donated it to Atsuta Shrine (the blade type is a wakizashi). Under Nagahide's rule of Echizen, swordsmiths from Mino who had relocated there fostered the Echizen-uchigatana style, and he also served as a patron of sword culture.

Later Evaluation

After Nagahide's death, his great importance became newly apparent through the rapid upheaval that followed the Oda regime. The organizational collapse that ensued demonstrated how much the versatile senior retainer, deemed "indispensable," had held things together. Rather than being merely martial, Nagahide carved out a unique place among Oda retainers as a comprehensive general skilled in castle construction, administration, and mediation.

The Celebrated Swords of Niwa Nagahide

The famous swords associated with Niwa Nagahide are three in number: the ō-wakizashi "Nikkari Aoe," the kodachi "Kannagiri Nagamitsu," and "Azamaru." "Nikkari Aoe," crafted by Aoe Sadatsugu of the Bitchu Aoe school in the Nanboku-chō period, passed from Shibata Katsuie through Nagahide to Toyotomi Hideyoshi and thence to the Kyogoku family of Marugame; it is now in the Marugame City Museum and is registered as Important Cultural Property. "Kannagiri Nagamitsu," a kodachi by the Kamakura period Bizen Osafune master Nagamitsu, is said to have been granted to Nagahide through Rokkaku Yoshikata and Oda Nobunaga, and is now held by the Tokugawa Museum, associated with the Mito Tokugawa line. "Azamaru," said to have been the sword of the legendary Heike warrior Fujiwara no Kagekiyo, carries the lore that its bearer will suffer eye disease; Nagahide, afflicted with such an ailment, dedicated it to Atsuta Shrine, where it remains today (the blade type is a wakizashi). Though the famous items associated with Nagahide center more on wakizashi and kodachi than on long swords themselves, they all testify to the flow of renowned blades through the Oda and Toyotomi regimes, and speak to the high standing of the senior retainer Niwa Nagahide.