Can I bring my medicine on a plane in Japan?

You can take this in the cabin. Yes. Medicine is exempt from the 100ml liquid rule on international flights — carry it separately and tell the officer. In checked baggage: yes, but keep anything you need during the flight with you.

Updated September 29, 2026

YesIn the cabin

YesIn checked baggage

Medicine & healthCategory

Carry-on: yesChecked bag: yes

What the rule says

Japan follows the international rules on dangerous goods, set out by the Civil Aviation Bureau.

Medicine (tablets and prescriptions): carry-on and checked baggage
Where	Allowed?	What applies
In the cabin	Yes	Yes. Medicine is exempt from the 100ml liquid rule on international flights — carry it separately and tell the officer.
In checked baggage	Yes	Yes, but keep anything you need during the flight with you.

What that means in practice

Japan bans some medicines that are sold over the counter elsewhere. Anything containing pseudoephedrine (Sudafed, some cold and sinus tablets) and stimulants such as Adderall are prohibited — bringing them in is a criminal offence, even with a prescription. Without a permit you may bring in up to a two-month supply of most medicines, or one month for prescription drugs. Carry them in the original packaging with your prescription.

Before you get to the checkpoint

Airlines can be stricter than the national rule. If it matters to your trip, check your airline's own page.
If an item is refused at the checkpoint you cannot go back and check it in — you lose it.
Japanese security staff will ask before opening your bag, and most speak enough English for this.

Why the rule is what it is

It is neither dangerous goods nor something that could be used as a weapon, so neither rule applies to it.

If it is refused: You cannot go back and check it in once you are at the screening point. It is taken from you and disposed of, and there is no compensation. Some Japanese airports have a post counter before security where you can mail it to yourself.
Who decides: The officer at the checkpoint, applying the national rules and your airline's own conditions. Where the airline is stricter, the airline wins.

You can buy this in Japan

Where to buy it: Drugstores for over-the-counter medicine. Prescription drugs need a Japanese doctor

Worth weighing against the space it takes in your bag. Most of this is cheaper in Japan than the excess baggage fee, and hundred-yen shops carry the everyday version of almost everything.

Travelling to Japan with medicine

Two separate things decide this: what the airline will carry, and what Japan will let in.

On the plane, medicine is exempt from the 100ml liquid rule. Carry it separately and say so at the checkpoint.
At the border you may bring a two-month supply of over-the-counter medicine or a one-month supply on prescription without a permit.
Some ingredients are banned outright: pseudoephedrine (in some Sudafed and cold tablets) and stimulants such as Adderall. A prescription does not change that.
Keep everything in the original packaging with the label, and carry the prescription.

Frequently asked questions

Can I take medicine in my hand luggage in Japan?

Yes. Yes. Medicine is exempt from the 100ml liquid rule on international flights — carry it separately and tell the officer.

Can I put medicine in my checked bag?

Yes, but keep anything you need during the flight with you.

What happens if security stops me with medicine?

It is taken from you at the checkpoint and disposed of. You cannot go back and put it in your checked bag once you are in the queue, and there is no compensation. Some Japanese airports have a post counter before security where you can mail it home instead.

Can I buy medicine in Japan instead?

Yes. Drugstores for over-the-counter medicine. Prescription drugs need a Japanese doctor.