What are the voltage and power outlets like in Tokyo? Do I need to bring a plug adapter and a voltage converter?

Sure, no problem! Let me break down the power plug situation for your Tokyo trip clearly and simply.

What are the voltage and plug types in Tokyo? Do I need a plug adapter or voltage transformer?

Headed to Tokyo? Don’t worry about power sockets—it’s actually very straightforward.

Here’s the simple answer: You likely won’t need a plug adapter, and you probably won’t need a voltage transformer.

Let me explain why in detail.

1. About Voltage (100V)

Japan, including Tokyo, uses 100V.

This is different from China’s 220V and is lower. You might wonder, "Will my devices get damaged or not work with a different voltage?" Hold on, see below.

2. About Sockets & Plugs (Two Flat Prongs)

Sockets in Japan accept unpolarized two flat-prong plugs, like this:

⚡️ ⚡️

Looks familiar, right? It’s identical to the most common two-flat-prong plugs in China (like most phone chargers) and fits directly into Japanese sockets.

However, three-prong plugs (like some laptop chargers) will not fit because Japanese wall outlets generally lack a grounding hole.

3. The Key Question: Do I Actually Need an Adapter or Transformer?

Plug Adapter:

Usually not needed. Devices like your phone, camera, power bank, electric shaver, etc., with original Chinese two-flat-prong plugs will plug directly into Japanese sockets.
When is it needed? Only if your device has a three-prong plug (e.g., some laptop chargers). In that case, you'll need a "China 3-pin to Japan 2-pin" plug adapter. Essentially, it converts your three-prong plug into a two-prong one.

Voltage Transformer:

99% of the time, NO! This is crucial. Grab your phone charger or laptop power adapter now.
Check your charger: Look for the small print labeled INPUT or 输入. You’ll likely see something like 100-240V.

⚡️INPUT: 100-240V~ 50/60Hz 0.5A⚡️

This rating covers Japan's 100V and China's 220V. This "dual voltage" or "universal voltage" design means the device automatically adapts to Japan's voltage. You absolutely do NOT need a transformer. Just plug it in. Most modern devices—phones, laptops, cameras, Nintendo Switch—use this design.
What devices MIGHT need a transformer? Primarily high-power devices not usually designed for travel, like hair dryers, curling irons, or electric kettles bought in China. These often only support 220V. Using them in Japan might cause them to barely work (e.g., a weak hair dryer), not work at all, or even get damaged.

Summary & Tips

Check your chargers before you go: Look at the INPUT rating on all your device chargers. If it says 100-240V, you're good to go.
Check your plug shape before you go: See if your plugs are two-prong or three-prong. If three-prong, buy a plug adapter beforehand.
Skip bringing high-power appliances: Don't bother bringing hair dryers, kettles, etc. It’s more trouble than it's worth. Hotels in Japan usually provide these, and the quality is often excellent. If you have specific needs, buy one locally at stores like Bic Camera or Yodobashi Camera – they’re affordable, and you might even find some cutting-edge gadgets.
Forgot something? Don't panic! If you realize you need an adapter after arriving in Japan, find them easily at airports, large electronics stores (like Bic or Yodobashi), or even convenience stores like 7-Eleven or FamilyMart.

Enjoy your trip to Tokyo!