Vietnam to Japan plug adapter: plugs and voltage compared

No. The Vietnam National Authority of Tourism describes round pins for Vietnam. Japan's outlets take Type A plugs with two flat pins (JNTO), so bring a plug adapter to Type A. Japan runs on 100V and Vietnam on 220V.

Updated October 3, 2026

220Vin Vietnam

50Hzin Vietnam

678,594visitors from Vietnam in 2025

Plug adapter needed

Vietnam and Japan side by side

Vietnam: 220V and 50Hz. Japan: 100V, 50Hz in the east and 60Hz in the west.

Voltage, frequency and plug in Japan and Vietnam (official pages, checked 2026-10-03)
	Japan	Vietnam
Voltage	100V JNTO	220V Vietnam National Authority of Tourism
Frequency	50Hz east, 60Hz west JNTO	50Hz Vietnam Ministry of Industry and Trade
Plug	Type A, two flat pinsPanasonic lists Type A and B JNTO	Round pins Vietnam National Authority of Tourism

Who says what about electricity in Vietnam

Official sources for voltage, frequency and plug in Vietnam, and what each one states
Source	What it states	Kind
Vietnam Ministry of Industry and TradeCircular 39/2015/TT-BCT, Article 4	Frequency: 50Hz Source	Government
Vietnam National Authority of TourismPlan your trip	Voltage: 220V; plug: two round prongs Source	Tourism board

What to pack in Vietnam for Japan

Round pins from Vietnam need a Type A adapter in Japan.

Round pins: a plug adapter to Type A. Source: Vietnam National Authority of Tourism.
Each device from Vietnam: read INPUT. 100-240V covers Japan's 100V; 220V alone needs a voltage converter (JNTO).
Vietnam: 50Hz. Tokyo: 50Hz. Osaka: 60Hz. A 50/60Hz label covers all three.

Flow chart for travellers from Vietnam: does the plug have two flat pins, and does INPUT include 100V? If not, bring a plug adapter or a voltage converter.

Figure by japan-japan.com from JNTO: Plugs and Electricity.

What official pages in Vietnam say

2 statements from the Vietnam National Authority of Tourism and the Vietnam Ministry of Industry and Trade.

Vietnam National Authority of TourismThe voltage supply in Vietnam is 220 volts. Most sockets accommodate plugs with two round prongs.Plan your trip

Vietnam Ministry of Industry and TradeTần số danh định trong hệ thống điện quốc gia là 50Hz.Circular 39/2015/TT-BCT, Article 4

In English: The nominal frequency of the national power system is 50 Hz.

Visitors from Vietnam in 2025

Vietnam ranked 11th among countries and regions, with 678,594 visitors to Japan in 2025 (JNTO, final figures).

Visitors in 2025: 678,594
Rank: 11th
Share of all visitors: 1.6%
Change from 2024: +9.2%

Frequently asked questions

Do I need a plug adapter in Japan from Vietnam?

No. The Vietnam National Authority of Tourism describes round pins for Vietnam. Japan's outlets take Type A plugs with two flat pins (JNTO), so bring a plug adapter to Type A.

Is Japan's voltage the same as Vietnam's?

No. Japan uses 100V (JNTO); Vietnam uses 220V, according to the Vietnam National Authority of Tourism.

Do I need a voltage converter in Japan from Vietnam?

Only for devices rated for 220V alone that are not dual-voltage (JNTO). A charger from Vietnam marked 100-240V needs none.