[Must-read before travelling] Japan plug vs Taiwan plug: socket specs, voltage differences and practical adapter tips

Hong Kong people have always loved a quick weekend getaway to relax, and Japan and Taiwan are among the top choices for many. However, have you noticed that the voltage and plugs in Japan and Taiwan are actually completely different from those in Hong Kong? Many people bring hair straighteners, hair dryers and camera chargers on board, only to find at the hotel that they cannot be used, or that they heat up so slowly that it is infuriating. Do not want these little hiccups to ruin your entire trip? This time, 10Life explains the differences in plugs and voltage in Japan and Taiwan, and shares how to choose a universal travel adapter, so you can enjoy your trip with greater ease. 

To understand what electrical appliances to bring for a trip to Japan, it is first necessary to understand how Japan’s electrical system works, including voltage, frequency, and the commonly used plug types locally.

Voltage and Frequency in Japan

The standard voltage in Japan is 100V nationwide, but the frequency varies by region:

• The Kanto region (Tokyo, Yokohama, Tohoku, Hokkaido) uses 50Hz
• The Kansai region (Osaka, Kyoto, Nagoya, Hiroshima) uses 60Hz

Fortunately, most modern electrical appliances (such as mobile phone chargers and laptop power adapters) support 50/60Hz, so in whichever city you visit, general electronic devices can usually be used normally.

Japan Plug Types

Japan mainly uses Type A (two flat pins) plugs, while some areas may also use Type B with a grounding pin.

• Type A: Two flat pins, arranged in parallel
• Type B: Two flat pins + one round grounding pin (three-pin)

Japanese sockets do not support Hong Kong’s British three-pin Type G plug, so you must bring a travel adapter when travelling.

Voltage and Frequency in Taiwan

The standard voltage in Taiwan is 110V, similar to Japan and the United States, and the frequency is uniformly 60Hz across the island. Although some buildings may have 220V circuits (for example, for air-conditioning), most hotels are fitted with 110V sockets.

Taiwan Plug Specifications

As in Japan, Taiwan mainly uses Type A and earthed Type B plugs:

• Type A: two flat pins  
• Type B: two flat pins + one earth pin (three-pin)

Taiwanese sockets cannot be used directly with Hong Kong Type G three-pin plugs, so a travel adapter is also required. If an appliance only supports 220–240V, it should not be plugged directly into a 110V socket, otherwise it may perform poorly, heat up very slowly, or even be damaged.  

When electrical appliances operate at a voltage below their design standard, they will generally not burn out immediately, but their performance will drop noticeably. If the appliance itself is more sensitive to voltage, it may also be harder to start, the display may flicker, or it may freeze more easily. In addition, appliances that are kept in a state of “working under strain” for a long period due to insufficient voltage will not only affect the user experience, but also shorten their lifespan. It is recommended to check before departure whether the appliance supports international voltage (100V–240V) to ensure safe and worry-free use.  

Many travellers often confuse transformers with plug adapters, but the functions of the two are completely different. A transformer is used to “change the voltage”, while a plug adapter merely “changes the plug shape” and the two are not interchangeable.

If you are carrying a Hong Kong-standard 220V appliance, such as a hair dryer, hair straightener or electric kettle, it may not operate properly in Japan or Taiwan without a transformer, and there is even a risk of overheating or burning out. Similarly, if an appliance only supports 110V, you will also need a transformer to step down the voltage when taking it to Australia, Europe or Mainland China (220V), in order to use it safely.

As for plug adapters, their main function is simply to allow Hong Kong’s Type G three-pin plug to fit into different sockets, but they do not change the voltage. 

Which appliances can be used directly?

If your appliance is marked 100V–240V (international voltage), such as a mobile phone, camera or laptop charger, you only need a plug adapter to use it with confidence, and there is no need to bring an additional transformer. 

Why do you need to bring a universal travel adapter when travelling? 

In Japan and Taiwan, the commonly used plug is a two-pin plug, which is completely different from the UK-style three-pin Type G plug commonly used in Hong Kong. Without a universal travel adapter, even if you bring your own electrical appliances, you may still not be able to use them. Bringing a reliable universal travel adapter can help you avoid disruption to your trip due to incompatible plug types.

How should you choose a universal travel adapter? 

Universal travel adapters may look similar, but their specifications and safety features can vary significantly. When choosing one, you can pay attention to the following points:

1. The more plug types it supports, the better. If it can cover major international standards such as A/C/G/O, it can be used in multiple countries. If it also has built-in USB or Type-C charging ports, you can charge several devices at once.  
2. Most universal travel adapters only provide plug conversion and do not have voltage conversion. If you need to use high-wattage Hong Kong 220V appliances in 100V/110V regions (such as Japan and Taiwan), for example a conventional hairdryer or hair straighteners, you must also bring a voltage converter.
3. You can check the product’s maximum power rating and whether it has safety certification. 

When travelling to Japan or Taiwan, many people take the opportunity to buy electrical appliances or small household items while the exchange rate is low. However, whether they can be used normally after bringing them back to Hong Kong actually depends on whether the plug, voltage and warranty policy are compatible. Below is a summary of the key points you need to note before buying, so you do not end up with something you cannot use after bringing it home. 

1. Is the plug suitable for Hong Kong 

Japan and Taiwan generally use Type A plugs (two flat pins), while some appliances in Taiwan use three-pin plugs (two flat pins plus earth). Hong Kong uses the UK-style three-pin Type G plug, so you will need a plug adaptor to use the appliance back in Hong Kong. If you are buying a household appliance that needs to be plugged and unplugged frequently, remember to check whether the plug is convenient for long-term use.

2. Does it support Hong Kong’s 220V voltage 

Japan uses 100V and Taiwan 110V, while Hong Kong uses 220V. If an appliance only supports a single voltage of 100V or 110V, it may not have sufficient voltage after being brought back to Hong Kong, affecting its performance and even causing damage. If you plan to buy one, you should look for appliances labelled 100V–240V (international voltage).

3. Is it a high-power appliance 

Hair dryers, rice cookers, vacuum cleaners and electric cookers are mostly high-power appliances and generally do not support international voltage. Using them across regions can easily cause overheating or burnout. Before buying, be sure to check the power and voltage ratings, otherwise it may turn out to be a waste of money.

4. Does the warranty coverage include Hong Kong 

Some international brands offer global warranty, but many Japan-only or region-specific models only come with local warranty. If there is no repair centre in Hong Kong, you may have to send the product back to Japan or Taiwan for repairs, which means additional cost and time.

5. Is the model region-specific 

Many people are tempted as soon as they see a “limited edition” product, but a region-specific appliance from Japan or Taiwan may not necessarily be usable in Hong Kong. In addition to possibly being unable to find the corresponding accessories, some brands’ Hong Kong service centres may also not provide warranty coverage for limited models. If it is a smart appliance, certain app, Wi‑Fi or server settings may also not support Hong Kong, meaning that even if the voltage is suitable, it may still not work properly. It is advisable to check carefully before buying.

1. Do I need to bring a plug adapter when travelling to Japan?

Japan uses Type A two-pin plugs, which are different from Hong Kong’s British three-pin Type G plugs. Hong Kong electrical appliances must be used with a plug adapter.

2. Will using a 220V appliance from Hong Kong in a 100V hotel in Japan damage it?  

It may not burn out immediately, but most 220V appliances will heat up very slowly, perform inadequately, or operate unstably. Long-term use may also damage the components. If the appliance is not dual-voltage, it is advisable not to use it.

3. How can I tell whether an appliance supports international voltage?

Check the appliance’s transformer or label. If it states “100–240V” (international voltage), it can be used directly in Japan, Taiwan and other places, and only a plug adapter is needed, not a voltage converter. If it is marked only “220V” or “110V”, it does not support cross-voltage use.

When travelling to Japan or Taiwan, apart from bringing the right adapter and understanding the voltage requirements, travel insurance is equally important. Unexpected situations can happen during a trip, such as delayed luggage, flight cancellations, or the accidental loss of your mobile phone or belongings, and even feeling unwell and needing to see a doctor. With suitable travel insurance, you can enjoy an extra layer of protection throughout your journey. Want to know which travel insurance is best? 10Life has compared more than 60 single-trip travel insurance plans available on the market, and has also launched a dedicated comparison section for "annual travel insurance". Premium differences and coverage details are clearly laid out, and an actuary rating is specially provided to help consumers accurately find the most suitable annual or single-trip travel insurance plan.

Further reading 
【Japan Self-Drive Guide 2025】12 key points for Hong Kongers driving in Japan
【Essential Reading for Travellers】A simple risk assessment before departure to help you travel with greater peace of mind

This English version of this article has been generated by machine translation powered by AI. It is provided solely for reference purposes. In the event of any discrepancy or inconsistency between this translation and the original Chinese version, the Chinese version shall prevail.