Vietnam: voltage and plug adapters

Checked against official sources Β· Updated Β· About

At a glance

ABC
Plug types A, B, CDepends on socket
hereJP
220VJapan: 100V
βœ… Products rated 100–240VLabeled β€œINPUT 100-240V” β†’ no transformer needed
⚠️ Products rated 100V onlyLabeled β€œINPUT 100V” only β†’ do not use it as is. More below

β€œINPUT” is printed on the label of the charger, AC adapter or the product itself. Plug drawings show the general shape only.

This is for traveling from Japan to Vietnam. The data is the IEC list (as of June 2025). Some places or buildings may use other types, so treat it as a guide.

1. Voltage, plug types and adapters

VoltageFrequencyPlug types
Vietnam220V50HzA, B, C
Japan (for comparison)100V50 / 60HzA, B

Depends on socket: Vietnam uses types A, B, C (per the IEC list). This includes type A, the same as Japan, but sockets differ by building. To fit type C sockets, use a plug adapter (C).

Source: IEC (International Electrotechnical Commission) World Plugs country list (as of June 2025). The IEC no longer publishes this list, so a copy is kept on this site (retrieved 2026-09-27)

PR Example plug adapter (Japanese online stores)
For the C sockets here (voltage is not converted)

ァンワァプラむ 桷倖電源倉換をダプタ TR-AD4W (Amazon.co.jp)
supports plugs A, B, BF, B3, C, SE, O, O2 and CB (the store's names), rated 6A 250V. It cannot convert voltage and cannot be used in Japan, the page says. Plug types at your destination that differ from Japan's (IEC list): C.

See it on Amazon

桷倖倉換プラグ A O BF C SE typeC USB 4γƒγƒΌγƒˆ (Rakuten Ichiba)
supports types A, O, BF, C and SE (the store's names), 100-240V. It does not convert voltage and cannot be used in Japan, the page says. Plug types at your destination that differ from Japan's (IEC list): C.
Illustration of a Vietnamese conical hat

PR πŸ“– Get ready for Vietnam (Japanese online store)

Pho in Hanoi, Hoi An's old town and the Ha Giang Loop. Itineraries for long trips, day trips and walks.

Lonely Planet Vietnam (17th edition) (Kindle edition) (Amazon.co.jp) Β· About Kindle guidebooks

Included in a Kindle+ (formerly Kindle Unlimited) membership (checked on the product page on 26 October 2026) β†’ About Kindle+ (Amazon.co.jp)

2. Electrical products from Japan

"INPUT" on the productResult
INPUT 100-240VVoltage: Vietnam uses 220V. Within the label (100–240V) β†’ no transformer needed
INPUT 100V onlyVoltage: Vietnam uses 220V. Outside the label (100V) β†’ do not use it as is. Use a product that supports the voltage in Vietnam, or use a transformer (check the transformer's manual for which products and wattage it supports)

Check the "INPUT" label on the charger, AC adapter or the product itself. For hair dryers and irons, see Taking a hair dryer or hair iron abroad; for plug shapes, see How to tell plug types A to N apart.

Source: IEC (International Electrotechnical Commission) World Plugs country list (as of June 2025). The IEC no longer publishes this list, so a copy is kept on this site (retrieved 2026-09-27)

4. Things to watch when entering Vietnam

Apart from what you can take on the plane, Vietnam has its own rules for what you bring in when you arrive. Only the points most relevant to travelers are listed here, based on the Ministry of Foreign Affairs of Japan's page.

Tap an item to see the rule.

Cash

There is no limit on the amount, but if you enter with more than US$5,000 in cash or the equivalent in foreign currency, or more than 15 million dong, declare it at the airport. If you did not declare and try to take out more than this amount when you leave, it may be confiscated

Alcohol

Duty-free up to one of the following: 1.5 liters of drinks with 22% alcohol or more, 2 liters of drinks under 22%, or 3 liters of beer and similar drinks. Declare anything over this

Tobacco

Duty-free: up to 200 cigarettes, up to 20 cigars, up to 250 g of leaf tobacco. Declare anything over this

E-cigarettes and heated tobacco products

Since January 1, 2025, using them in Vietnam may be subject to a fine, and bringing them in from abroad may be subject to a heavier fine than using them

Gold

Duty-free up to 300 g. Declare anything over this

Prohibited items

Guns, explosives, narcotics and other illegal drugs, antiques, and publications, photos, videos, etc. that may have a harmful effect on the morals of Vietnamese people. Video tapes, DVDs, CDs, etc. have their content checked, and a heavy fine may be imposed if they are judged obscene

Magazines, manga, etc.

Magazines with revealing gravure photos or manga with sexual content may be treated as obscene publications, with a fine of 10 million to 100 million dong. The Ministry of Foreign Affairs of Japan's page says even weekly magazines available anywhere in Japan could be subject to enforcement

Customs declaration forms are not handed out on the plane; ask a customs officer at the airport. After inspection the form is stamped and returned to you, so keep it safely until you leave.

The Ministry of Foreign Affairs of Japan's page advises checking the latest duty-free allowances yourself before you travel. For the duty-free allowance when you return to Japan, see Duty-free allowance when returning to Japan.

Source

Source: Ministry of Foreign Affairs of Japan, Overseas Safety website: "Viet Nam: basic safety information" (last updated March 13, 2026) [in Japanese] (retrieved 2026-09-28)

Handy to have before you go

PR Example travel bottles (Japanese online stores)
For liquids in the cabin on international flights: containers of 100ml or less

貝印 γ‚½γƒ•γƒˆγƒœγƒˆγƒ« 60ml (Amazon.co.jp)
capacity 60ml, 1 bottle, polyethylene and polypropylene.

See it on Amazon

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