Can I take contact lens solution on a plane in Japan?

You can take this in the cabin. Yes. It counts as a cosmetic under the Japanese rules, so 0.5 litres per container and 2 litres per person. On international flights containers over 100ml have to go in the hold. In checked baggage: yes.

Updated September 29, 2026

YesIn the cabin

YesIn checked baggage

Cosmetics & skincareCategory

Carry-on: yesChecked bag: yes

What the rule says

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

Contact lens solution: carry-on and checked baggage
Where	Allowed?	What applies
In the cabin	Yes	Yes. It counts as a cosmetic under the Japanese rules, so 0.5 litres per container and 2 litres per person. On international flights containers over 100ml have to go in the hold.
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

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.

How the cosmetics limit works

Japan sets a total, not a limit per product.

Each container: 0.5 litres or 0.5kg. Per person: 2 litres or 2kg in total.
That 2 litre total is shared between cosmetics, medicines and aerosols. It is not 2 litres of each.
On international flights the 100ml rule applies on top, for anything in the cabin.
Japan Customs allows 24 items of cosmetics duty free, counted as one container of one product.

Frequently asked questions

Can I take contact lens solution in my hand luggage in Japan?

Yes. Yes. It counts as a cosmetic under the Japanese rules, so 0.5 litres per container and 2 litres per person. On international flights containers over 100ml have to go in the hold.

Can I put contact lens solution in my checked bag?

Yes.

What happens if security stops me with contact lens solution?

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 contact lens solution in Japan instead?

Yes. Drugstores.

Does the 100ml rule apply to contact lens solution on domestic flights in Japan?

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