Can I take eye drops on a plane in Japan?

What the rule says

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

Eye drops: carry-on and checked baggage
Where	Allowed?	What applies
In the cabin	Yes	Yes. Eye drops count as medicine, so they are exempt from the 100ml rule.
In checked baggage	Yes	Yes.

Before you get to the checkpoint

On an international flight every container of liquid must be 100ml or less, inside one transparent re-sealable bag of 1 litre or less.
Domestic flights inside Japan have no liquid limit at all.
Medicine, baby milk and special dietary food are exempt — carry them separately and tell the officer.
Take the bag out of your luggage and put it in its own tray.

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 — Japanese eye drops are a common souvenir
Roughly: 500–1,500 yen

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 eye drops in my hand luggage in Japan?

Yes. Yes. Eye drops count as medicine, so they are exempt from the 100ml rule.

Can I put eye drops in my checked bag?

Yes.

What happens if security stops me with eye drops?

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 eye drops in Japan instead?

Yes. Drugstores — Japanese eye drops are a common souvenir. Roughly 500–1,500 yen.

Does the 100ml rule apply to eye drops on domestic flights in Japan?

No. Domestic flights within Japan have no liquid limit. The 100ml rule applies only to international flights.

Related items

Sources for this page

Japan Civil Aviation Bureau — items that can and cannot be carried by airchecked September 29, 2026