The Rain and the Charge: What the Shinchō Kōki Says at Okehazama

A fresh translation

Original text

Words and concepts

• 急雨 (kyūu)
  A sudden, hard rain. The surrounding sentence emphasizes force and direction rather than giving a measured duration.
• 石氷
  Literally “stone-ice,” an old expression for hail. It appears inside a comparison: the rain struck as if hailstones were being thrown.
• すは、かかれ
  An urgent command: “Now—charge!” The repeated verb makes the order immediate and audible within the scene.
• 黒煙
  Literally “black smoke.” In this rushing battlefield description it may evoke the dark cloud raised by movement, but the phrase alone does not identify its exact material.

A short passage inside a long movement

The quoted lines come from section 24 of the Shinchō Kōki Preface Scroll, the part of the work that narrates Oda Nobunaga’s career before his entry into Kyoto. The section is headed “The Death in Battle of Imagawa Yoshimoto.” Its scope is much wider than the three sentences selected here. It begins with reports concerning Imagawa movements and the Oda outworks at Washizu and Marune, follows Nobunaga’s departure and the gathering of his force, places Imagawa Yoshimoto at Okehazama, and continues through combat and the taking of Yoshimoto’s head.

The excerpt therefore is not a complete account of the battle. It isolates the point at which the chronicle changes from approach to assault. Before it, Nobunaga has moved his men forward and addressed them. After it, the narrative turns to the men surrounding Yoshimoto, the repeated fighting as that group is reduced, and the encounter in which Yoshimoto is killed. Rain, command, and collapse form a hinge within that larger sequence.

This position matters because famous battles are often compressed into one image. Okehazama can become “the surprise attack in the storm,” as though those words explained the whole event. The chronicle instead supplies a chain. Even when we examine only the hinge, we should preserve the fact that it has actions on both sides.

The rain is directional in the narrative

The first sentence does more than announce bad weather. It tells the reader how the rain met the two forces. It struck the enemy in the face and the Oda side from behind. The comparison with thrown hail makes the sensation violent. In narrative terms, the weather is not a neutral curtain falling equally across an empty field; it has an orientation relative to moving bodies.

That orientation is one reason the episode is memorable. The same shower can obstruct sight and movement differently depending on which way people face. Yet the sentence does not provide a meteorological diagram. It gives no wind speed, duration, visibility range, or exact boundary of the storm. Nor does it say that every person on either side experienced identical conditions. Its precision is literary and positional: face on one side, back on the other.

The distinction protects us from two opposite errors. One would dismiss the rain as decoration because it is vividly narrated. The weather plainly belongs to the chronicle’s explanation of the moment. The other would treat vividness as a measurement and reconstruct more than the words contain. The passage allows us to say that the text represents the shower as favoring the direction of Nobunaga’s advance. It does not let us calculate the advantage.

The order comes when the sky clears

The next sentence is equally important because it places the command after a change: Nobunaga sees the sky clear. The sequence is not “rain falls, therefore men charge blindly inside it.” The narrator marks an interval, however brief, between the force of the shower and the order to go forward.

Nobunaga’s actions are given in a tight cluster. He sees, takes up a spear, raises his voice, and commands the attack. The prose turns environmental observation into public action. Nothing in these lines reveals an extended private deliberation. The reader encounters decision through visible and audible signs: a clearing sky, a weapon seized, and a repeated order.

The spear should also be read with restraint. Its presence gives the commander a bodily place in the scene and presents him as participating in the forward movement. The sentence does not by itself tell us precisely how long he fought with it, whom he struck, or whether every later representation of his personal combat is accurate. A narrated gesture can be important without answering every question a modern battle map might raise.

From black dust to collapse

The third sentence changes viewpoint again. The enemy sees the attack coming amid kurokemuri, “black smoke.” English “dust cloud” makes immediate visual sense for men rushing over ground, but translating the word only as dust would conceal the actual image. “Black dust” in the fresh translation keeps the likely battlefield effect while the note preserves the literal wording and its uncertainty.

What follows is a simile of rapid dispersal. The force collapses toward the rear “like water flung away.” The comparison describes shape and speed, not a count. It turns an organized front into something suddenly displaced. The phrase kuwatto, rendered “in a sudden surge,” adds the sense of an abrupt collective motion.

This is not yet the death of Yoshimoto. The subsequent text narrows to the mounted retainers around him, first described as roughly three hundred and later as about fifty after repeated clashes. By ending the excerpt before that later passage, we can see exactly what these three lines do: they narrate the beginning of a general break. They do not narrate every stage from that break to Yoshimoto’s death.

Does the text describe an ambush?

Modern summaries frequently use “ambush” or “surprise attack.” Those labels may be useful at the scale of the whole campaign, but neither English word appears as an exact equivalent in the selected lines. Here the enemy sees the attackers rushing forward. The drama comes from the sudden weather, the timing of the order, the visual cloud, and the abrupt collapse.

That does not prove there was no surprise. A force can see an attack at the moment it begins and still be unprepared for its direction, timing, or intensity. It does mean that the three sentences should not be offered as a self-contained proof of a hidden approach. To evaluate routes and prior awareness, a reader must return to the surrounding section and compare other evidence rather than make one famous label carry the entire argument.

The same caution applies to the idea of a solitary masterstroke. The passage centers Nobunaga’s perception and command, as a chronicle of his career might be expected to do. But the action still requires the gathered force, the earlier fighting at the outworks, the condition of Imagawa troops, the terrain, and the defenders around Yoshimoto. A commander’s decisive order is not the same claim as a commander acting alone.

Weather is a condition, not a complete cause

Can we say the rain decided Okehazama? The safest answer is that the Shinchō Kōki makes it part of the conditions at the decisive transition. The rain is described as striking the opposing force in the face; the clearing is immediately followed by Nobunaga’s command; the advance is immediately followed by collapse. That is a strong narrative relationship.

It is not a controlled test of alternate outcomes. The text cannot show what would have happened without the shower. It does not assign a percentage of the victory to weather, morale, exhaustion, leadership, terrain, or chance. Historical causation is not made more rigorous by turning the most cinematic detail into the only cause.

The chronicle’s sequence nevertheless deserves attention precisely because it is specific. Weather does not float above the story as atmosphere. It meets faces and backs. Clearing is observed. An order is issued. The opposing formation reacts. Each verb supplies a link, and the reader can distinguish those links from later explanation.

What these three statements do not prove

They do not prove the exact size of either army. Numbers occur elsewhere in the section, but they have their own textual and historical problems and are not part of this excerpt. They do not prove that the rain was supernatural, even though the surrounding account reports that people spoke of divine assistance. Reporting such an interpretation is evidence that it circulated within the narrative; it is not meteorological proof of divine action.

They also do not establish a precise modern map of every movement. Place-names and terrain descriptions elsewhere in the section are essential for that work, as are other sources and physical geography. The three statements locate action in a sequence, not on a coordinate grid.

Finally, they do not give us an untouched voice from the instant of battle. The Shinchō Kōki is a written account shaped by selection, memory, transmission, and surviving textual witnesses. This limitation does not make it useless. It tells us what kind of claim we are making: the chronicle represents the transition to attack in this order and with these images.

Why the hinge is worth reading

A narrow excerpt cannot explain Okehazama, but it can improve the question. Instead of asking whether one legend is simply true or false, we can ask what the source actually connects. The answer is not just “rain” and not just “Nobunaga.” It is an observed change in weather, a public command, a mass advance, and an opposing collapse.

That structure leaves room for uncertainty without dissolving into vagueness. We can name the section, locate the printed pages, compare the transcription with the scan, and see where the selected lines sit. We can also mark what remains outside them. Close reading is not a refusal to tell the story. It is the discipline of showing which words make each part of the story possible.

Source

Ōta Gyūichi, Shinchō Kōki (信長公記), Preface Scroll (首巻), section 24, “Imagawa Yoshimoto Uchijini no Koto” (今川義元討死之事). The quoted passage appears in the 1881 Ga ji kan ga sho edition, upper volume, National Diet Library Digital Collections, frame 16, continuing into frame 17. The searchable Wikisource transcription identifies that edition as its base text and links each passage back to the corresponding NDL frame. For calendar context, Nagoya City records the battle date as Eiroku 3, fifth month, nineteenth day (12 June 1560).