How to Say “I Am Allergic to Peanuts” in Japanese

ピーナッツアレルギーです
pīnattsu arergī desu
The English phrase 'I am allergic to peanuts' is expressed in Japanese as ピーナッツアレルギーです (pīnattsu arergī desu).
This phrase is a statement used to inform others that eating peanuts causes an adverse medical reaction.

Is there a formal and an informal way to say it?

For a very formal or highly polite tone, you can use ピーナッツアレルギーでございます. In informal settings, you can use わたしはピーナッツアレルギーだ or ピーナッツアレルギーだよ.

How does it change in a sentence?

While desu (am) is common in conversation, using ピーナッツアレルギーがあります (there exists/I have) is a grammatically standard way to express having a medical condition. Using arimasu instead of desu can sound slightly more formal and precise when communicating medical needs to staff or doctors.

How do you pronounce it?

pīnattsu arergī desu

When do people say it?

When dining out, it is helpful to follow your statement of the allergy with 食べられません (cannot eat) to ensure the restaurant staff understands the consequence.

Did you know?

  • While ピーナッツ is a loanword, the native word 落花生 rakkasei literally means 'falling seed plant', describing how the peanut grows underground.
  • When describing a reaction, Japanese speakers often use the verb 出ます (demasu), which literally means 'to come out'. Instead of saying 'my skin gets itchy', one might say 'the rash 'comes out' on my skin'.
  • In Japan, food allergy labeling is strictly regulated by law, meaning you can often look for the kanji 特定原材料 (tokutei genzairai) on packaging to identify mandatory allergen labeling.

Examples in context

  • ピーナッツアレルギーです。
    pīnattsu arerugī desu.
    I am allergic to peanuts.
  • すみません、ピーナッツアレルギーです。
    sumimasen, pīnattsu arerugī desu.
    Excuse me, I am allergic to peanuts.
  • 実は、ピーナッツアレルギーです。
    jitsu wa, pīnattsu arerugī desu.
    Actually, I am allergic to peanuts.

Example conversation

Hiyori and Kenta are choosing a dessert at a cafe.

  1. 健太 Kenta

    このケーキ、おすすめだよ。
    Kono kēki, osusume dayo.
    This cake is recommended.
  2. 陽葵 Himari

    ごめん、私はピーナッツアレルギーです。
    Gomen, watashi wa pīnattsu arerugī desu.
    Sorry, I am allergic to peanuts.
  3. 健太 Kenta

    えっ、本当?大丈夫かな。
    E', hontō? Daijōbu kana.
    Oh, really? I wonder if it's okay.
  4. 陽葵 Himari

    店員さんに聞いてみるね。
    Ten'in-san ni kiite miru ne.
    I will ask the staff.
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Dean Ray
Dean RayHelp make this guide better. Spot a mistake, know another way to say it, or have an example from real life? Share it below.
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