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An open jar of peanut butter with a knife dipped into the spread, viewed from above

Photo: Peanut butter knife.jpg by "Peanut Butter" by Dr Stephen Dann is licensed under CC BY-SA 2.0 (CC BY-SA 2.0, cropped), via Wikimedia Commons.

Can I bring peanut butter on a plane?

Carry-on in JapanYes, within limits
Checked bag in JapanYes

In Japan peanut butter is allowed in carry-on with conditions, and in checked bags.

Carry-on: Yes on domestic flights. On international flights peanut butter is on Japan's liquids list as a spread, alongside jam and chocolate cream: each container must be 100ml or less and fit in your one clear resealable bag of 1 litre or less. Checked baggage: Yes. A full-size jar goes in checked baggage.

Peanut butter on flights in and from Japan

On a domestic flight the 100ml liquid limit does not apply. On an international flight it does.

Peanut butter: carry-on and checked baggage in Japan
WhereAllowed?What applies
In the cabinYes, within limitsYes on domestic flights. On international flights peanut butter is on Japan's liquids list as a spread, alongside jam and chocolate cream: each container must be 100ml or less and fit in your one clear resealable bag of 1 litre or less.
In checked baggageYesYes. A full-size jar goes in checked baggage.
Domestic flights in Japan
The 100ml liquid limit does not apply.
International flights from Japan
Each container 100ml or less, all of them inside one transparent re-sealable bag of 1 litre or less, one bag per person.
Carry-onChecked bag
Carry-on liquid limits: exemptions, connections and the rule in each countryCarry-on: conditionsChecked bag: yes

Peanut butter: a spread that security reads as a paste

Peanut butter does not pour, yet every list here places it on the liquids side.

The spreads row and its neighbours
Japan's liquids list has a row called Spreads, and peanut butter is the first name in it, ahead of jam and jelly. The Japanese edition explains the row as things spread on bread and continues with chocolate cream, custard cream, butter cream, marmalade and sandwich spread. Nut and chocolate spreads sold beside peanut butter belong to that row too.
Why a thick paste still counts
The opening notes of Japan's list go past liquids, gels and aerosols to articles which cannot keep their shape without the container. A scoop of peanut butter fails that test. The European Commission's wording arrives there by another route: its definition of liquids covers pastes and other items of similar consistency.
Jars labelled in grams
Peanut butter is sold by weight, and the limit is written by volume. ANA's FAQ on international liquids settles it: densities differ, but 100mL is read as 100g. Narita Airport prints the figure as 100 ml (g), and Australia's TravelSECURE page states both units, 100 mL (volume), 100 g (weight) or less, for each container.
An opened jar is measured by the jar
A travel column on JAL's shopping site says opened or unopened makes no difference. Its example is a 150g container with 70g left: the container holds more than 100ml (100g), so it cannot be carried on. GOV.UK states the rule in a line, saying the limit still applies if the container is only part full.
The jar and the sandwich are separate entries
The TSA lists Peanut Butter with a carry-on limit of 3.4oz/100 ml, and lists Sandwiches as allowed in carry-on with no size figure. Skymark's FAQ likewise says light meals such as bento and sandwiches can be brought into the cabin and eaten there.
Carry-onChecked bag
HoneyCarry-on: conditionsChecked bag: yesBread and sandwichesCarry-on: yesChecked bag: yesFood and packed mealsCarry-on: conditionsChecked bag: yes

Peanut butter: the rule country by country

The carry-on answer for peanut butter is the same in all 5 other places we checked. The limits themselves are not identical, so read the row for the country you fly from.

Peanut butter: carry-on and checked baggage rules by country
Flying fromCarry-onChecked bagWhat the authority says
JapanCivil Aviation BureauWith limitsYesOn international flights peanut butter is on Japan's liquids list as a spread, alongside jam and chocolate cream: each container must be 100ml or less and fit in your one clear resealable bag of 1 litre or less. Source
United StatesTSAWith limitsYesPeanut butter is allowed in carry-on bags in containers of 3.4oz/100 ml or less. It can go in checked bags. Source
European UnionEuropean Commission, EASAWith limits—Pastes count as liquids: containers of 100 ml or less in one transparent re-sealable bag of one litre or less. Source
United KingdomUK GovernmentWith limitsYesLiquid or semi-liquid foods such as jam and honey, and pastes, count as liquids. At most airports containers larger than 100ml cannot go through security. Pack liquids in hold baggage if possible. Source
Hong KongCivil Aviation DepartmentWith limitsYesPastes and jams are LAGs: in cabin baggage, containers of 100 ml or less in a clear re-sealable bag of 1 litre. LAGs not needed for the flight should go in hold baggage. Source
AustraliaHome Affairs, CASAWith limitsYesPeanut butter is listed as a gel on international flights: carry-on containers of 100 mL or 100 g or less, all in one resealable bag. The limits do not apply to checked baggage or most domestic flights. Source

Each row comes from that authority's own page. Airlines can be stricter, and the screening officer has the final say.

If security in Japan will not let peanut butter through

What to do
Move peanut butter to the bag you check in before you reach security. Narita Airport states that anything given up at the checkpoint is discarded and cannot be returned.

Frequently asked questions

Can I bring peanut butter on a plane?

On flights in and from Japan: Yes on domestic flights. On international flights peanut butter is on Japan's liquids list as a spread, alongside jam and chocolate cream: each container must be 100ml or less and fit in your one clear resealable bag of 1 litre or less. In checked baggage: Yes. A full-size jar goes in checked baggage.

Is peanut butter a liquid or a solid at airport security?

It is screened on the liquids side. GOV.UK counts pastes as liquids, and Hong Kong's CAD lists jams, sauces and pastes among liquids, aerosols and gels. Australia's TravelSECURE page goes further and names peanut butter as a gel, next to jam, yoghurt and cheese spread.

Can I bring single-serve peanut butter cups or a squeeze tube in carry-on?

Yes, when each cup or tube holds 100 ml or less. Japan's spreads row is written for cans, jars, plastic containers and tubes, so the pack type does not change the rule. Peach's FAQ gives the conditions for an international flight: containers of 100ml(g) or less, in a clear sealable bag of 1 litre or less, 1 bag per person.

Will a jar of peanut butter get my bag pulled aside at screening?

It can. The TSA's Peanut Butter entry says officers may instruct travelers to separate foods, powders and any materials that can clutter bags and obstruct clear images on the X-ray machine. GOV.UK says food items in hand luggage can obstruct x-ray images, so bags may need to be checked again manually by security.

Does the TSA allow peanut butter in carry-on bags?

Peanut butter is allowed in carry-on bags in containers of 3.4oz/100 ml or less. It can go in checked bags.

Can you put peanut butter in checked luggage?

Yes. A full-size jar goes in checked baggage.

What is the rule for peanut butter on flights from Australia?

Australia: Peanut butter is listed as a gel on international flights: carry-on containers of 100 mL or 100 g or less, all in one resealable bag. The limits do not apply to checked baggage or most domestic flights.

Related items

Carry-onChecked bag
HoneyCarry-on: conditionsChecked bag: yesLiquids (the 100ml rule)Carry-on: conditionsChecked bag: yesBread and sandwichesCarry-on: yesChecked bag: yesFood and packed mealsCarry-on: conditionsChecked bag: yesSnacks and sweetsCarry-on: yesChecked bag: yesCanned foodCarry-on: conditionsChecked bag: yes
Show all 19Bottled drinks (PET bottles)Carry-on: conditionsChecked bag: yesWater bottle / thermosCarry-on: conditionsChecked bag: yesAlcohol (bottles of sake, whisky, wine)Carry-on: conditionsChecked bag: conditionsSelf-heating mealsCarry-on: noChecked bag: noBaby formula and liquid milkCarry-on: conditionsChecked bag: yesDry iceCarry-on: conditionsChecked bag: conditionsGlass bottles and jarsCarry-on: yesChecked bag: yesPowders (protein, powdered medicine)Carry-on: yesChecked bag: yesFresh food, vegetables and fruitCarry-on: yesChecked bag: yesBeer and canned chuhaiCarry-on: conditionsChecked bag: yesCoffee beans and ground coffeeCarry-on: yesChecked bag: yesFrozen foodCarry-on: conditionsChecked bag: conditionsYogurt and puddingCarry-on: conditionsChecked bag: yes

Back to What you can bring

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Sources for this page

Show all 14
  1. Japan Civil Aviation Bureau (MLIT) — List and Description of LAGs Restriction (1 October 2015)
  2. Japan Civil Aviation Bureau — Items restricted in carry-on and checked baggage (updated 24 April 2026)
  3. Japan Civil Aviation Bureau — List of liquids covered by the quantity limits (Japanese, 1 October 2015)
  4. Narita International Airport — Restrictions on carry-on liquids on international flights
  5. TSA — What Can I Bring?: Peanut Butter
  6. European Commission — Information for air travellers
  7. GOV.UK — Hand luggage restrictions: Liquids
  8. Civil Aviation Department (Hong Kong) — Frequently Asked Questions: Implementation of Security Controls for Liquids, Aerosols and Gels (LAGs)
  9. Australian Department of Home Affairs — TravelSECURE: What you can and can't bring
  10. ANA — FAQ: International flights, what are the restrictions on carrying liquids? (Japanese)
  11. JAL Shopping — Travel column: foods restricted in the cabin on international flights (Japanese)
  12. Peach Aviation — FAQ: Can I carry liquids such as drinks and lotion on board? (Japanese)
  13. Skymark Airlines — FAQ: Can I bring a packed lunch or drinks (PET bottles) on board? (Japanese)
  14. GOV.UK — Hand luggage restrictions at UK airports