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How to Say ‘Declared war!’ in Japanese

宣戦布告しやがった!

せんせんふこくしやがった!

💬 Usage Tip: The phrase [しやがった] adds an aggressive or rude nuance, often used by tough characters.

🇯🇵 In Japan: Declaring war against a major power represents an ultimate act of defiance and courage, valued highly in Japanese storytelling.

Word-by-Word Breakdown

宣戦せんせん

[sensen]

declaration of war (first half)

宣戦 is the “declare war” part; commonly appears with 布告 as 宣戦布告.

Example

宣戦布告しやがった!と騒ぎになった。

It caused an uproar: “They went and declared war!”

布告ふこく

[fukoku]

proclamation; declaration (official)

布告 is an official proclamation. Together 宣戦布告 = “declaration of war.”

Example

宣戦布告しやがった!世界がざわついた。

“They declared war!” The whole world stirred.

[shi]

do (stem)

し is from する “to do.” Here it attaches to 宣戦布告する “to declare war.”

Example

宣戦布告しやがった!本気だ。

They went and declared war! They’re serious.

やがっやがっ

[yagatsu]

(rude auxiliary) went and did (damn it)

やがる adds contempt/anger; しやがった = “went and did it (damn it).”

Example

宣戦布告しやがった!正気か。

They went and declared war! Are they sane?

[ta]

(past ending)

た makes it past: しやがった = “did (in a damn way).”

Example

宣戦布告しやがった!もう後戻りできない。

They went and declared war! There’s no turning back now.

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