Electric adapter for devices in hotels

Hi!

Do Japanese hotels (mainly in Tokyo and Kyoto) have electric adapters for European devices?

I am planing on buying an adapter on the airport when I arrive i Japan.

Thank you.

Depends on the hotel. The more fancy ones likely yes. But better to bring your own.

The main electronic stores (BicCamera, Yodobashi Camera) sell them - last one I got was around 600 yen. Easy to get.
Some hotels have universal sockets that take different plug shapes - might not work for all combinations, but I do see them from time to time.

Or buy one from your home country before you leave

there are many types. some are EU <-- Japan, others are EU --> Japan. instruction is written in Japanese.

it is better for you to buy it in your country. what you need to ask to the stores is the adapter which fits to USA. the items which fit to USA will fit to Japan.

If you only have usb c / usb a charging cables I wouldn't even bother takin it with me (unpess required for the flight) and just buy a charger in a conbini or electric store.
They have the right plug and are small, way smaller than those travel adapters

As a follow-up to my previous post, stores like BicCamera carry the full range of adapters both for people arriving into Japan and needing to plug their devices in, and for people travelling overseas and taking their Japan devices. In general, the adapters are tiny, nothing more than they need to be. Most of the ones I have are approximately one cubic inch for three pin plugs. Two pin is a lot smaller than that.

Most European devices, chargers and laptop powerbricks will work on 110v. So the only thing needed is a plug size converter.

It was my understanding that Japan voltage is 100v, like here in the US, we use 110v so to be 95% safe, I was told to get a converter. Would suck to damage your phone with the voltage difference.

I wouldn't worry about electronics. They automatically convert the voltage. My laptop, iPad and iPhone charged perfectly fine in Japan from the Us and also in Europe. The only difference is that Japan doesn't use the third, grounded plug. In Europe, I just used a plug adapter. Never have I taken a 'converter' if that's what you're referring to transformer.

That 110 volt mentioned above is the nominal voltage. Don't get too hung up about it.
In reality you would be getting anywhere between 100 and 120 volts. Here in Japan I have had occasions and places where the voltage was definitely on the low side.
For countries running 230V it is common for the range to be 220 or even 215 on the low side and up to 245 or 250 volts on the high side. Power grids aim to keep things within +/- 5%, but +/-10% occurs. (previous life working in the electricity industry)