Fullmetal Alchemist: Brotherhood (鋼の錬金術師 FULLMETAL ALCHEMIST)
等価交換
Tōka kōkan
“Equivalent Exchange”
— Edward Elric
Answer both practice questions correctly to complete this line.
Not yetThe scene
The first law of alchemy, and the spine of the whole story: to obtain something, something of equal value must be given up. Ed states it in the narration that opens the early episodes (episodes 1-2) and it returns throughout the series — the rule the Elric brothers broke as children, and the price they are still paying. Fans worldwide can chant it on cue.
Word by word
| Japanese | Romaji | Meaning |
|---|---|---|
| 等価 | tōka | equal in value — 等 (equal) + 価 (value, price) |
| 交換 | kōkan | exchange, trade — swapping one thing for another |
| 錬金術 | renkinjutsu | alchemy — the art the whole series is built on |
Grammar notes
Two blocks make a law: 2+2 kanji compounds
等価交換 is two two-kanji words bolted together: 等価 (equal value) + 交換 (exchange). Japanese builds its serious vocabulary exactly this way — learn the blocks and long compounds stop being scary: 情報交換 (information exchange), 物々交換 (barter).
A noun phrase as a universal law
There is no verb and no sentence here at all — just the name of the principle. Stating a doctrine as a bare noun phrase is a very Japanese rhetorical move (compare Death Note's 計画通り on this site): the full rule — 'to gain anything, you must give up something of equal value' — is left for the listener to unfold.
Can you say this in real life?
等価交換 is a genuine term — it also appears in economics and contracts — so the vocabulary itself is safe and even useful. Reciting it in Ed's grave narration voice, though, is an unmistakable fan quote. In a business document you will meet the same word in phrases like 等価交換方式 (equivalent exchange method) with zero drama attached.
Practice
Q1. What does the law of 等価交換 say?
Q2. Fill in the blank: 「等価＿＿」
Read & Watch Fullmetal Alchemist: Brotherhood
The best way to enjoy this line in the wild is to meet it in the original work. Official places to read and watch Fullmetal Alchemist: Brotherhood will be listed here.
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