Siege of Hiuchi

What Happened

In the spring of 1183 a Taira army under Taira no Koremori marched against Hiuchi Castle, a fortress held for Minamoto no Yoshinaka in Echizen Province. The castle stood on rocky crags, and its defenders had strengthened it further by damming a watercourse to create a moat around the position. The siege ran through April and into May, ending on 20 May 1183, in the second year of the Juei era.

The defences were not broken by assault. A traitor inside the fortress tied a message to an arrow and shot it into the Taira camp, disclosing how the dam could be breached. Once the water was drained, the position could be taken, and the castle fell to the Taira.

Yoshinaka himself survived the fall, and much of his force escaped with him. The strongpoint was lost; the commander was not.

Background

The siege belongs to the Genpei War, the conflict between the Minamoto and the Taira that ran from 1180 to 1185 and ended with the Taira destroyed and the Minamoto established as the ruling warrior house. In 1183 the war's centre of gravity had shifted to the Hokuriku region, the Japan Sea coast north of the capital. Minamoto no Yoshinaka, a cousin of Minamoto no Yoritomo, had come down from the mountains of Shinano and built a chain of fortified positions across Echizen Province, of which Hiuchi was one.

The Taira, whose strength lay in the capital and the Inland Sea, answered with a campaign into the Hokuriku. The siege of Hiuchi followed the Yowa Hokuriku Expedition, the Taira push northward named for the Yowa era. The site is identified with the Yunoo Pass, in the mountains of what is now Fukui Prefecture, at roughly 35.77° north and 136.20° east.

Hiuchi's value was geographic. A fortress on rocky high ground beside a pass controls the road through it, and a dammed stream turned the approach into a water obstacle as well. Reducing such a place by direct attack meant climbing broken ground under fire from above. The Taira therefore needed either a long blockade or a way past the water — and they got the second.

Why It Mattered

The fall of Hiuchi did not remove Yoshinaka from the war, and that is the point of the episode. He and most of his men got away, and within weeks he was strong enough to move against the Taira in force. The siege cost the Minamoto a fortress, not an army.

It also shows how these campaigns were actually decided. A fortification on crags with a moat was close to impregnable to the tactics of the day; it fell because someone inside chose to betray it. Sieges in this period turned on supply, morale and divided loyalties at least as often as on engines or escalades, and Hiuchi is a clean example of a garrison undone from within.

For the Taira, the victory was real but incomplete. They had cleared a strongpoint from the Hokuriku road without destroying the force that held it, and Yoshinaka remained in the field to fight another season.

The Name in Japanese

The Japanese name is 火打城の戦い, read ひうちじょうのたたかい (Hiuchijō no tatakai).

• 火 — read hi here; "fire."
• 打 — read uchi here; "strike," "beat."
• 城 — read jō here (as the second element of a compound); "castle," "fortress."
• の — hiragana particle, read no; the possessive/linking particle, "of."
• 戦 — read tataka here; "battle," "fight."
• い — hiragana, read i; completes the verb form tatakai, the noun "a fight."

Two things are worth noticing. First, 火打 (hiuchi) literally means "fire-striking" — the spark struck from flint and steel. The name is also written 火打ち山, "fire-striking mountain," for the height the castle stood on, and the same word appears in hiuchi-ishi (火打石), the flint used to strike a spark. Second, 城 has two common readings: shiro when it stands alone, and jō in compounds such as this one. A learner meeting 火打城 in a text should expect Hiuchijō, not Hiuchishiro.

The full phrase follows a standard pattern for naming battles: place name + 城 + の + 戦い, "the battle of X Castle." The same frame gives 長篠城の戦い (Nagashinojō no tatakai) and many others, so the pattern is worth learning as a unit.

Key Figures

Taira no Koremori (平維盛) commanded the Taira force at Hiuchi. He was a grandson of Taira no Kiyomori, the clan leader whose rise had set off the Genpei War, and he belonged to the generation of Taira commanders who carried the war after Kiyomori's death in 1181. The siege of Hiuchi is recorded as his operation, and it ended in a Taira victory on 20 May 1183.

Minamoto no Yoshinaka (源義仲) held Hiuchi as one of his fortresses in Echizen Province. He had built his position in the Hokuriku as an independent power within the Minamoto cause, and he survived the loss of the castle along with much of his force.