How do I know if my phone works with a Japan eSIM?

Your phone must be carrier-unlocked and natively support eSIM technology. Most modern smartphones, such as iPhone XS or newer and recent Samsung Galaxy devices, are fully compatible. You can check your device settings or dial *#06# to verify if an EID number is displayed.

How much data do I need for a trip to Japan?

For daily navigation via Google Maps, translation tools, and light social media use, 1 GB to 2 GB per day is usually sufficient. If you plan to stream video or upload extensive travel content, consider an unlimited or higher-tier plan. Most travelers find a total of 10 GB to 20 GB ideal for a typical 10-to-14-day Japan itinerary.

When should I install and activate my Japan eSIM?

You should install the eSIM profile prior to departure using a stable Wi-Fi connection. Keep the eSIM line turned off until you land in Japan, then turn it on and enable Data Roaming to connect to local networks like NTT Docomo or SoftBank. The validity period generally begins only when the eSIM connects to a supported Japanese network.

Will WhatsApp, Instagram, and iMessage still work in Japan?

Yes, all your messaging and social media apps will continue to function normally without any re-configuration. WhatsApp and iMessage remain linked to your original phone number, allowing your contacts to reach you seamlessly. The eSIM simply provides the mobile data required to keep these applications connected.

Does the Japan eSIM come with a local phone number?

Most travel eSIMs for Japan are data-only plans and do not include a local (+81) phone number for standard voice calls or SMS. You can easily make voice or video calls using internet-based apps like WhatsApp, LINE, FaceTime, or Skype. Note that LINE is the most widely used messaging app for local services and businesses in Japan.

What should I do if my eSIM does not connect upon arrival in Japan?

First, verify that your eSIM line is toggled on and that Data Roaming is enabled in your cellular settings. If you still have no connection, restart your phone or toggle Airplane Mode on and off to force a network search. You can also connect to free Wi-Fi at major airports like Narita or Haneda to access customer support if needed.

How does an eSIM compare in price to standard international roaming?

A local travel eSIM is substantially cheaper than home carrier roaming, which often charges $10 to $15 per day for limited data. eSIM plans offer direct access to local Japanese network rates without hidden daily fees or unexpected overage charges. Buying an eSIM ahead of time allows you to lock in a fixed price for your entire trip.

Travel guides·Japan

20 fun facts about Japan every traveller should know

Japan is one of the most rewarding countries to visit — safe, punctual, endlessly photogenic, and full of small cultural details that catch first-time travellers off guard. Here are 20 fun facts, plus the practical tips we wish we'd known before landing at Narita.

Fun facts about Japan

1
It's made up of 6,852 islands
Japan is an archipelago of nearly 7,000 islands, but 97% of the population lives on just four: Honshu, Hokkaido, Kyushu, and Shikoku.
2
Vending machines everywhere
There are around 4 million vending machines across Japan — roughly one for every 30 people. You'll find hot coffee, cold tea, ramen, and even fresh eggs inside them.
3
The busiest crosswalk on earth
Shibuya Scramble in Tokyo sees up to 3,000 people cross at once during peak hours.
4
Trains are almost never late
The average delay on the Shinkansen bullet train is under one minute — including delays caused by weather and natural disasters.
5
Slurping noodles is polite
Loudly slurping ramen or soba is a compliment to the chef and helps cool the noodles as you eat.
6
Tipping is not a thing
Leaving a tip can actually cause confusion. Great service is simply the standard.
7
Over 5 million vending-machine drinks a day
Hot coffee in a can, sold from a vending machine, is a genuinely great Japanese invention.
8
Cash still rules in many places
Small restaurants, shrines, and rural inns often accept cash only. Convenience-store ATMs (7-Eleven, Lawson) accept foreign cards.
9
The world's oldest company was Japanese
Kongō Gumi, a temple-building firm, operated for over 1,400 years before being absorbed in 2006.
10
Cherry blossom season lasts only ~2 weeks
The exact bloom shifts each year — the Japan Meteorological Corporation publishes an official forecast every spring.
11
Over 200 flavours of Kit Kat
Wasabi, sake, matcha, sweet potato, Tokyo banana — Kit Kats are practically a souvenir category of their own.
12
Capsule hotels started in Osaka
The first capsule hotel opened in 1979 in Umeda. A capsule bed still costs less than most Western hostels.
13
There are more pets than children
Japan has more registered cats and dogs than children under 15.
14
You can drink tap water anywhere
Tap water is safe and clean across the entire country, even in rural areas.
15
Mount Fuji is still an active volcano
It hasn't erupted since 1707, but it's officially classified as active.
16
Square watermelons exist
Grown in Zentsuji, they're decorative gifts — and can sell for over ¥10,000.
17
There are eight forms of politeness
Japanese has multiple levels of formality built into its grammar. Even a simple 'thank you' shifts based on context.
18
Tokyo is the world's largest metro area
Greater Tokyo has more than 37 million people — larger than all of Canada.
19
Bowing has rules
A slight nod is casual; a 45° bow is deeply respectful. When in doubt, mirror the person opposite you.
20
Japan runs on two power frequencies
Eastern Japan (Tokyo) uses 50Hz; western Japan (Osaka, Kyoto) uses 60Hz. It rarely affects travellers, but it's a fun trivia point.

Practical tips for first-time visitors

Get an eSIM before you fly — airport SIM kiosks are pricey and often close overnight.
Buy a Suica or Pasmo IC card at any station: one tap works for trains, buses, and most convenience stores.
Carry a small hand towel — public bathrooms often don't provide paper towels or hand dryers.
Google Maps works well, but Japan Travel by NAVITIME is better for train transfers and platform numbers.
Rubbish bins are rare in public — carry a small bag and take your trash back to your hotel.
Don't eat while walking. Sit near the vendor or find a bench.
For Kyoto temples, arrive at opening time — 08:00 is empty; 10:00 is packed.
Learn three phrases: sumimasen (excuse me), arigatou gozaimasu (thank you), onegaishimasu (please).

Staying connected in Japan

Japan has excellent 4G/5G coverage from three major carriers — NTT DoCoMo, SoftBank, and KDDI (au). A travel eSIM installs before you fly and activates automatically the moment you land, so you can pull up train directions, translate menus, and share your location without paying roaming charges. If you're travelling for a week or less, a Total data plan is usually cheaper than Daily — you only pay for the data you actually use.

Best time to visit

Late March to early April for cherry blossoms, late November for autumn colours (kōyō), or January for winter illuminations and skiing in Hokkaido. Golden Week (late April to early May) is beautiful but every domestic traveller is on the move — book trains and hotels weeks in advance.

Getting around

The Shinkansen is the fastest way between major cities. A JR Pass makes sense only if you're taking three or more long-distance legs; for a single Tokyo–Kyoto round trip, individual tickets are cheaper. Inside cities, subway + IC card covers almost everything.

eSIM FAQs for Japan

How do I know if my phone works with a Japan eSIM?: Your phone must be carrier-unlocked and natively support eSIM technology. Most modern smartphones, such as iPhone XS or newer and recent Samsung Galaxy devices, are fully compatible. You can check your device settings or dial *#06# to verify if an EID number is displayed.
How much data do I need for a trip to Japan?: For daily navigation via Google Maps, translation tools, and light social media use, 1 GB to 2 GB per day is usually sufficient. If you plan to stream video or upload extensive travel content, consider an unlimited or higher-tier plan. Most travelers find a total of 10 GB to 20 GB ideal for a typical 10-to-14-day Japan itinerary.
When should I install and activate my Japan eSIM?: You should install the eSIM profile prior to departure using a stable Wi-Fi connection. Keep the eSIM line turned off until you land in Japan, then turn it on and enable Data Roaming to connect to local networks like NTT Docomo or SoftBank. The validity period generally begins only when the eSIM connects to a supported Japanese network.
Will WhatsApp, Instagram, and iMessage still work in Japan?: Yes, all your messaging and social media apps will continue to function normally without any re-configuration. WhatsApp and iMessage remain linked to your original phone number, allowing your contacts to reach you seamlessly. The eSIM simply provides the mobile data required to keep these applications connected.
Does the Japan eSIM come with a local phone number?: Most travel eSIMs for Japan are data-only plans and do not include a local (+81) phone number for standard voice calls or SMS. You can easily make voice or video calls using internet-based apps like WhatsApp, LINE, FaceTime, or Skype. Note that LINE is the most widely used messaging app for local services and businesses in Japan.
What should I do if my eSIM does not connect upon arrival in Japan?: First, verify that your eSIM line is toggled on and that Data Roaming is enabled in your cellular settings. If you still have no connection, restart your phone or toggle Airplane Mode on and off to force a network search. You can also connect to free Wi-Fi at major airports like Narita or Haneda to access customer support if needed.
How does an eSIM compare in price to standard international roaming?: A local travel eSIM is substantially cheaper than home carrier roaming, which often charges $10 to $15 per day for limited data. eSIM plans offer direct access to local Japanese network rates without hidden daily fees or unexpected overage charges. Buying an eSIM ahead of time allows you to lock in a fixed price for your entire trip.