Can You Bring Modafinil to Japan? The Provigil Rules Explained

Modafinil has one of the most generous psychotropic thresholds Japan sets — 6 g total — but it's still a controlled drug, not an OTC one.

Last reviewed: 24 July 2026Verify specifics with official sourcesWritten for international residents & visitors

You take modafinil or Provigil for narcolepsy, shift work, or an off-label prescription, and you're wondering whether can you bring modafinil to Japan has a clean yes or a customs headache attached. The short version: yes, and the official threshold is unusually generous compared to other psychotropics. The catch isn't the amount — it's how people try to get more of it into the country.

The short answer

Yes — and the threshold is generous by Japanese standards

You can bring modafinil to Japan. It's classed as a psychotropic on Japan's controlled-substance list, and the Narcotics Control Department (NCD) sets a no-certificate threshold for it at 6 grams total, non-injectable — the highest figure on the standard psychotropic list, well above thresholds set for drugs like diazepam (1.2 g) or alprazolam (72 mg). If your total modafinil for the trip, added up across every tablet, comes to 6 g or less, you can pack it in your carry-on and go. Go over that, or bring an injectable form, and you need an import certificate arranged before departure.

6 g covers a large real-world supplyFor a typical daily dose taken once a day, 6 g works out to roughly a month's supply — meaning most travelers carrying a standard prescription amount never come close to the threshold. Still, do the arithmetic on your own dose rather than assuming.

Why it's still a controlled drug, not an OTC one

A generous threshold isn't the same as no rules

Modafinil sits on the same official NCD threshold list as sleep aids and benzodiazepines — drugs like zolpidem (300 mg), methylphenidate (2.16 g), and clonazepam (180 mg). Being a psychotropic means two things stay true no matter how generous the cap is: you cannot mail it into Japan as a workaround, and above the threshold the rules tighten just like they do for every other drug on that list. See Japan's psychotropic import limits for the full threshold table.

The mistake: ordering modafinil online and shipping it to yourselfModafinil is widely sold through overseas online pharmacies and grey-market vendors, and it's tempting to just have a supply shipped to a Japanese address instead of carrying it. Don't. The personal-import allowance and the certificate process both assume the medication travels with you, declared at customs — not arriving separately by post. A mailed package containing a controlled psychotropic can be intercepted, and there's no straightforward path to reclaim it once it is.

If your modafinil supply is over 6 g

You need MHLW's import certificate before you fly

Going over 6 g doesn't mean you can't bring your medication — it means you need a Yunyu Kakunin-sho (輸入確認書), still widely called by its older name Yakkan Shoumei (薬監証明), issued by MHLW. The same certificate applies if your modafinil is injectable in any amount, or your total supply runs past a one-month quantity even under 6 g. Yakkan Shoumei: the import certificate explained covers the application in detail — it isn't a same-week process, so plan around it rather than your flight date.

What to do before you travel

Steps for both under- and over-threshold cases

Add up your total modafinil in grams.
Multiply your daily dose by the number of days of supply you'll be carrying, then compare the total to 6 g.
Under 6 g: pack it in original packaging with your paperwork.
No certificate needed, but keep tablets in their pharmacy packaging and carry a copy of your prescription and a doctor's letter naming the drug, dosage, and reason.
Over 6 g: apply for a Yunyu Kakunin-sho at least 14 days ahead.
Apply through MHLW's online application portal. Processing generally takes about 2-3 business days once your application is complete, but build in slack, especially around Golden Week, Obon, and New Year.
Contact the right regional desk if you're unsure which covers your arrival airport.
Kanto-Shinetsu Regional Bureau (yakkan@mhlw.go.jp) covers Narita, Haneda, and other Kanto ports. Kinki Bureau (kiyakuji@mhlw.go.jp) covers Kansai, Chubu Centrair, Fukuoka, and Naha.
Never order modafinil online and have it shipped to a Japanese address.
A mailed package is not a recognized substitute for carrying it declared at the border, and it can be seized.
At the airport, use the red channel and declare it.
Carry it in your hand luggage. If you needed a certificate, present it together with your prescription and doctor's letter.

If you run out while you're in Japan, remember that pharmacists cannot fill a prescription written outside the country — you'd need to see a doctor here first. For the broader picture of what's allowed in and how the paperwork fits together across different drug classes, bringing prescription medication to Japan is a good next stop, and the health guide covers the full import framework in more depth. If you need a pharmacy once you're here, the finder lets you filter for verified English-language support before you go in.

Frequently asked questions

Quick answers to the questions people actually search

How much modafinil can I bring to Japan without a certificate?

Up to 6 grams total, non-injectable, per the official Narcotics Control Department (NCD) list. That's the whole amount you're carrying for the trip added together, not a per-day figure — most travelers with a standard prescription supply come in well under it.

Is Provigil legal in Japan?

Yes. Modafinil (sold as Provigil in some countries) is a regulated psychotropic in Japan, not a banned substance. A personal supply within the 6 g threshold needs no certificate; above it, you need an import certificate from MHLW arranged before you travel.

Can I buy modafinil online and have it shipped to Japan?

No. This is the mistake that actually gets people in trouble — ordering from an overseas pharmacy or grey-market site and having it mailed to a Japanese address. Mailing a psychotropic into Japan is not a legal substitute for carrying it yourself, and packages like this can be seized at the border with no simple way to get them back.

What happens if I bring more than 6 g of modafinil to Japan?

You need a Yunyu Kakunin-sho (import certificate) from MHLW before you fly, or you risk it being confiscated at customs. Apply at least 14 days ahead through MHLW's online portal — see the steps below.

Can I get modafinil prescribed while I'm in Japan?

Not on a foreign prescription — pharmacists in Japan cannot fill a script written abroad. You would need to see a doctor in Japan, and it's worth confirming with them whether modafinil is something they're willing to prescribe locally, since availability and indications vary by clinic.

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