Does the eSIM work straight away in Japan?

Yes. Set the eSIM up before you leave and it joins the NTT Docomo network by itself as soon as you reach Japan. You can use it at 4G/LTE & 5G speeds.

What is the network coverage like for a Japan eSIM?

Through the NTT Docomo and SoftBank networks, it provides about 99% coverage across Japan. The signal is stable in big cities like Tokyo and Osaka, and in regional areas too.

Can I use a hotspot in Japan?

Yes. Hotspot (tethering) works on most plans, so a laptop or tablet can share your data.

Can I buy an additional Japan eSIM plan?

Yes. If your data runs low, top up whenever you like by purchasing another plan and adding it to the same device.

Does eSIM work in Japan?

Japan supports eSIM, and plans start from ₩4,505. Install it with the QR code you receive after buying, then just turn on data roaming after you arrive and you are connected straight away. There is no need to swap your SIM.

Travel eSIM or carrier roaming: which is cheaper for a trip to Japan?

For a short trip or light data use, a travel eSIM is usually cheaper. Unlimited roaming from Korean carriers costs about ₩11,000–₩15,000 a day, but with an eSIM you can buy just the days of data you need in advance. For a short trip for one or two people, an eSIM has a big advantage; for a family or very heavy data use, compare carrier unlimited roaming too.

Can I keep using my Korean number while travelling in Japan?

Yes. The eSIM works as a data-only second line, so your Korean SIM and number stay as they are. Use the Yeohaengyusim eSIM for data only, and keep receiving calls, texts and KakaoTalk on your Korean number.

Can I add to or extend my Japan eSIM plan?

Yes. When you use up your data or the plan period ends, you can buy a new plan at any time. Keep using the eSIM profile you already installed; there is no need to install it again, so you carry on without interruption.

Do I set up the eSIM before I leave or after I arrive?

We recommend installing it (registering the QR code) before you leave, while you have Wi-Fi. Data starts when you turn on data roaming after you arrive in Japan. Just remember "set up before you leave, switch on when you arrive" and you can use the internet as soon as you land.

How many GB of data do I need for a trip to Japan?

For mostly maps and messaging, we recommend about 1 GB a day; to use plenty of social media and photo uploads, about 2 GB a day. If you stream a lot of video or tether a lot, an unlimited plan is better. You can always buy more if you run short, so it is fine to choose a little extra at first.

Does my smartphone support eSIM?

You can use it if your phone supports eSIM. iPhone supports it from the XS and XR onwards; Galaxy phones sold in Korea from the S23, Z Flip4 and Z Fold4 onwards. Dial *#06# in the phone app: if an EID number appears, your phone supports eSIM. If it is SIM-locked, it needs to be unlocked.

Japan eSIM plans

Instant delivery

A travel eSIM for Japan starts from ₩4,505 and works as soon as you buy it. In Japan it connects automatically to local networks such as NTT Docomo · SoftBank · au by KDDI · Rakuten Mobile (4G/LTE, 5G where supported), with population coverage of about 99%. Install it with the QR code before you leave and you can use the internet as soon as you land, with no roaming setup. In Tokyo and Osaka, SoftBank tends to feel fastest; out to rural and mountain areas, the Docomo network is more stable.

Sent instantly by email
30-day refund
Customer support in Korean
Credit card · Apple Pay

Japan eSIM at a glance

Price: From ₩4,505
Local networks: NTT Docomo · SoftBank · au by KDDI · Rakuten Mobile
Network: 4G/LTE & 5G
Activation: QR code — install before you leave
Recommended data: Maps and messaging 1 GB a day · more room 2 GB a day · video: unlimited

eSIM plans you can use in Japan

Data	Validity	Price
Unlimited	1 day	₩4,505
Unlimited	3 days	₩12,039
Unlimited	5 days	₩18,820
Unlimited	7 days	₩25,601
Unlimited	10 days	₩35,395
Unlimited	15 days	₩52,723
Unlimited	30 days	₩88,886
1 GB	7 days	₩4,505
2 GB	15 days	₩9,026
3 GB	30 days	₩10,533
5 GB	30 days	₩16,560
10 GB	30 days	₩30,121
20 GB	30 days	₩45,189
50 GB	30 days	₩69,298

Japan is the overseas destination most visited by Koreans. Tokyo, Osaka and Fukuoka are just some of its appealing cities, and no country is better for hunting down great restaurants and shopping. Get online the moment you arrive in Japan with a Yeohaengyusim eSIM.

Flight time from Korea

About 2 hours

Time difference

None (same as Korea)

Best season to go

March–May, October–November

Plug type

Type A (same as Korea)

Why a Japan eSIM?

You really need the internet while travelling in Japan, but buying a local SIM is a hassle and carrier roaming is expensive. Set up a Yeohaengyusim eSIM at home, and you are connected right away when you land at Narita or Kansai airport. Use data in Japan easily with a single QR code, with no SIM swap.

Network coverage in Japan

Carrier

NTT Docomo

+ SoftBank

Network

4G/LTE & 5G

Coverage

99%

How do I install a Japan eSIM?

1
Buy a plan
Choose a data plan for Japan and complete payment.
2
Scan the QR code
Open the email we sent and point your phone camera at its QR code.
3
Install the eSIM
Complete the eSIM installation as prompted. Doing it before you leave is simplest.
4
Connect on arrival
Once you land in Japan, switch data roaming on and you're online.

1
Buy a plan
Choose a data plan for Japan and complete payment.
2
Scan the QR code
Open the email we sent and point your phone camera at its QR code.
3
Install the eSIM
Complete the eSIM installation as prompted. Doing it before you leave is simplest.
4
Connect on arrival
Once you land in Japan, switch data roaming on and you're online.

Which plan is right for me?

Short trip

For a short 3–7 day trip, an unlimited data plan is ideal.

Business trip

We recommend a high-data plan with plenty for video calls and email.

Long stay

Staying a month or more? A large-data plan gives the best value.

Family trip

Families sharing a connection across multiple devices should pick a tethering-enabled plan with a generous data allowance.

eSIM, local SIM or pocket Wi-Fi: what suits a trip to Japan best?

	eSIM	Local SIM	Pocket Wi-Fi
Activation	Instant (QR code)	Buy locally	Pick up / delivery
Setup	2 minutes	SIM swap needed	Separate device
Price	From ₩4,505	₩10,000~50,000	₩5,000~15,000/day
Network	Local 4G/LTE	Local 4G/LTE	Local 4G/LTE
Devices	1 smartphone	1 smartphone	Up to 5
Flexibility	Top up any time	Fixed data	Daily rental
Best for	Ideal for travellers	Long stays	Families / groups

Japan eSIM FAQ

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