Information only. Not legal advice. Laws change and enforcement varies — consult a qualified attorney for your jurisdiction before acting.
What's Illegal inJapan?
The rules that get visitors to Japan in trouble are rarely the obvious ones. Of the 35 common items and activities tracked here, 21 are outright illegal and 6 are restricted or conditional. The strictest area for Japan is medications, so it is worth reading that section closely.
ADHD medications (Adderall, Vyvanse) are illegal stimulants. Common cold medicine (Sudafed) contains banned substances.
DO NOT BRING
Any stimulant medication · Bringing meat products · Working on tourist visa · Not carrying passport
What to know before you go to Japan
The single thing worth knowing first: ADHD medications (Adderall, Vyvanse) are illegal stimulants. Common cold medicine (Sudafed) contains banned substances. It is the kind of rule that looks minor at home and becomes a serious problem at the border or in public, which is exactly why it tops this page.
Within medications, Japan treats Adderall/Vyvanse, Ritalin/Concerta, and Codeine, among others, as off-limits. Carrying or doing any of these can mean confiscation, fines, or detention depending on the case — and a foreign prescription, habit, or "I didn't know" rarely helps once you are stopped. Each entry below links to the official source it is checked against, with the verified ones marked.
Two things travelers regularly get wrong about Japan: Common Western cold remedies like Sudafed and Vicks inhalers contain substances banned under Japan's stimulant control law; and CBD is only legal if it contains zero THC, unlike the 0.3% threshold accepted in many other countries — and the 2023 Cannabis Control Act amendment now criminalises cannabis use itself, not just possession. Assumptions like these are how otherwise careful visitors end up in trouble, so it is worth checking the specifics rather than guessing.
One important caveat: Customs treatment of stimulant medications is the same nationwide and not waived for short trips or transfers. Laws and their enforcement can shift between regions and over time, so treat this page as a sourced starting point and confirm anything borderline against the official links before you rely on it.
BEFORE YOU GO TO JAPAN — 3 STEPS
Confirm the rule with an official Japan source
Laws change. Before you pack, verify anything borderline against Ministry of Health (MHLW) — the official source we cite for Japan.
Open Ministry of Health (MHLW) →Carry proof for anything restricted
If you're bringing prescription medication or a regulated device into Japan, carry the prescription, original packaging, and a doctor's note. For controlled medicines, check whether an import permit is required.
Have a backup if something gets held at the border
Know who to call and keep your travel insurance and embassy details handy in case an item is seized or questioned at customs in Japan.
General guidance, not legal advice. How we verify.
COMMON MISCONCEPTIONS
- Common Western cold remedies like Sudafed and Vicks inhalers contain substances banned under Japan's stimulant control law.
- CBD is only legal if it contains zero THC, unlike the 0.3% threshold accepted in many other countries — and the 2023 Cannabis Control Act amendment now criminalises cannabis use itself, not just possession.
JURISDICTION NOTES
- Customs treatment of stimulant medications is the same nationwide and not waived for short trips or transfers.
- Designated smoking zones are enforced city by city, with Tokyo wards fining street smoking outside marked areas.
OFFICIAL SOURCES
IN-DEPTH GUIDES
Information only. Not legal advice. Laws change and enforcement varies — consult a qualified attorney for your jurisdiction before acting.