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Numbness / Weakness in Japan: When to Call 119 (Possible Stroke) + What to Do

Last updated: 2026-03-04

Numbness can be harmless… or the first whisper of something urgent. If it’s sudden, one-sided, or comes with trouble speaking/seeing/walking, don’t “wait it out.” Treat it like an emergency until proven otherwise.

General information, not medical advice. If you think it may be serious, act early.

Quick Answer (TL;DR)

  • Sudden numbness or weakness on one side of the body is a classic stroke warning sign.
  • Tokyo Fire Department’s EMS Guide for “Numbness” can recommend calling an ambulance (119)—and explicitly flags “one side of the body is paralyzed” as a key symptom to report.
  • In Japan, 119 is for ambulance/fire; tell them it’s a medical emergency and give your location.

30-Second Decision Box

Call an ambulance (119) now if any of these apply

  • New one-sided numbness or weakness (face/arm/leg), especially if sudden
  • “One side of the body is paralyzed” / cannot raise an arm or walk normally
  • Numbness/weakness with trouble speaking or understanding speech
  • Numbness/weakness with vision problems, severe imbalance, or trouble walking
  • New numbness/weakness with severe headache or collapse

If symptoms are mild and stable (and you’re fully alert)

You can consider local telephone advice lines (e.g., #7119 in some areas), but don’t use advice lines as a delay button if symptoms are sudden or worsening.

Step 1 — How to call 119 (Japan)

When you call 119, start with:

  • “Medical emergency.”
  • Your location (hotel name / landmark / address)
  • What’s happening: “numbness/weakness” and whether it’s one-sided

Public phone tip: if you’re using a public phone with an emergency button, you can press it and dial 119 without coins/cards.

What to say

  • “Medical emergency.”
  • “Sudden numbness and weakness.”
  • “One side of the body is paralyzed.”
  • “They have trouble speaking / understanding.”
  • “My location is: [hotel name / landmark / address].”

Step 2 — What to do while waiting (safe, low-risk steps)

  1. Note the exact time symptoms started (or the last time the person was normal). This matters a lot for emergency care.
  2. Keep them still and safe (falls happen easily with weakness).
  3. Do not give food or drink if there’s facial droop, slurred speech, or swallowing trouble.
  4. Do not drive yourself if stroke is possible—ambulance gets you to the right care faster and safer.
  5. If you have diabetes and suspect low blood sugar, follow your usual plan only if the person is fully awake and can swallow safely.

Why this is treated as urgent

Stroke warning signs include sudden:

  • numbness/weakness on one side
  • confusion / trouble speaking
  • trouble seeing
  • trouble walking / dizziness / loss of balance
  • severe headache with no known cause

Even if symptoms improve quickly, it can still be a serious warning. When in doubt, treat “sudden one-sided” as emergency.

If you’re a foreign visitor and need help navigating care

Japan Visitor Hotline (JNTO) is 24/7 and multilingual:

  • From Japan: 050-3816-2787
  • From overseas: +81-50-3816-2787

(But if stroke is possible: call 119 first.)

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