Imai Kanehira

Who They Were

Imai Kanehira (今井兼平) was a samurai commander of the late Heian period, the era that ran from 794 to 1185 and ended as the Genpei War tore Japan apart. He was born in 1152, the son of Nakahara Kanetō, and died on 4 March 1184. He is counted among the Kiso Shitennō (木曾四天王), the "Four Heavenly Kings of Kiso" — the four key retainers of the warlord Minamoto no Yoshinaka.

Kanehira's bond with Yoshinaka was not a matter of ordinary service. He was Yoshinaka's milk brother: Yoshinaka was fostered within Kanehira's family, and the two were raised together from childhood. That closeness shaped everything Kanehira did, including the manner of his death.

Life and Career

Kanehira grew up alongside Yoshinaka in the Kiso region of what is now Nagano Prefecture. When Yoshinaka raised forces during the Genpei War — the conflict between the Minamoto and Taira clans — Kanehira became a joint commander of his faction. The two men met up at Seta, and from that point Kanehira stood beside Yoshinaka as one of his four principal retainers.

His first major engagement was the Siege of Fukuryūji, where he commanded the Minamoto besiegers and took the fort. He went on to fight the forces of Minamoto no Yoshitsune, who had turned against Yoshinaka in order to end what was seen as his tyranny. In 1184, at the Battle of Awazu, Kanehira commanded Yoshinaka's troops when the two cousins met in battle. He held off the attacks of Minamoto no Noriyori for a long stretch of the fighting.

The end came when Kanehira learned that Yoshinaka had been killed by an arrow. He committed suicide by leaping from his horse while holding his sword in his mouth — a death that became one of the most famous scenes in the literature and drama that grew up around the Genpei War.

Why They Matter

Kanehira matters for two reasons. The first is military: he was one of the four retainers on whom Yoshinaka's whole campaign rested, and his defence at Awazu against Noriyori was stubborn enough to be remembered as a feat in its own right. The second is cultural. His death, and the loyalty that drove it, made him a lasting figure in Japanese storytelling. The nō play Kanehira centres on his ghost, relating the story of Yoshinaka and himself and expressing his wish to cross over to the other side. That play kept his name alive in performance for centuries after the battles were over.

The Name in Japanese

The name is written 今井兼平. In kana it is いまい かねひら, and in romaji it is Imai Kanehira. The family name comes first, as is standard in Japanese.

今 (い, i) — "now," "the present." A simple, everyday character used constantly in modern Japanese.

井 (まい, mai) — "well," as in a well for drawing water. Together, 今井 (Imai) is a common Japanese surname; the place name Imai in Matsumoto City preserves the same two characters.

兼 (かね, kane) — "to combine," "to serve concurrently," "to hold two things at once." This is the same 兼 that appears in the title kanpaku (関白), the regent who "combined" the functions of reading and reporting on memorials to the emperor.

平 (ひら, hira) — "flat," "level," "peace." It is the same character used in the clan name Taira (平), the great rival house of the Minamoto in the Genpei War. Read alone it is taira or hei; here, in a personal name, it takes the reading hira.

So the full name breaks down as "Imai" — the surname, from 今 "now" and 井 "well" — plus "Kanehira," a given name combining 兼 "to combine" with 平 "flat, peaceful." Note that the surname 今井 is not read with the readings the characters carry in isolation; Japanese names frequently use readings that must simply be learned.

Legacy

Kanehira's burial place is disputed, but it is largely believed that his tumulus stands at Kawanakajima in Nagano City. He also has tombs at Seiran in Ōtsu City, Shiga Prefecture, and at Hōsai Shrine.

He was enshrined as a deity in several places. Imai Shrine at Kawanakajima in Nagano City honours him, as does Imai-jinja Shrine in Imai, Matsumoto City. He is also enshrined at Kisosansha-jinja Shrine in Kitatachibana-machi, Shibukawa City, Gunma Prefecture. His line continued through a daughter, who became the mother of Kiso Yoshimoto.

For students of Japanese, Kanehira is a useful anchor: a name that appears in nō theatre, in shrines across three prefectures, and in the place name Imai, all traceable to a man who died on 4 March 1184 rather than outlive the brother he had grown up with.