Key takeaways
Japan has some of the fastest and most reliable mobile coverage on earth, including subways and bullet trains. The simplest way to stay online is a Roamix Japan eSIM, which activates on arrival, beats pocket wifi for convenience, and powers the translation and transit apps you will use constantly. Budget 5 to 8 GB for a one week trip.
- Coverage is near universal, including subway tunnels and Shinkansen routes.
- A Roamix eSIM is easier than pocket wifi, with nothing to charge or return.
- Japan is still cash friendly, so carry some yen alongside IC cards and contactless.
- Translation and transit apps are essential and data hungry, so size data accordingly.
- Many nationalities enter visa free for short stays, but confirm before travel.
Best way to get data in Japan
A Roamix eSIM beats pocket wifi for most visitors because there is no device to carry, charge or return, and it works the instant you land.
| Option | Best for | Good to know |
|---|---|---|
| Roamix eSIMRecommended | Best for: Most travellers | Instant activation on a premium network, covers subways and bullet trains, nothing to collect or return. |
| Pocket wifi rental | Best for: Groups sharing one device | Popular in Japan but needs charging, pickup and return, plus deposits. |
| Local physical SIM | Best for: Longer stays | Available at airports but tourist SIMs are often data only and require setup. |
| Carrier roaming | Best for: Very short trips | Simple but the priciest way to get data in Japan. |
Free wifi exists at stations, convenience stores and many cafes, but it is patchy, often needs sign up, and is not reliable for navigation on the move. Mobile data is far more practical.
How much data you need
Japan trips lean heavily on translation, transit routing and maps, all of which use steady data. Add photo sharing and the occasional video call and a week can use more than you expect.
5 to 8 GB
One week Tokyo and Kyoto trip
Constant transit routing, translation and maps plus daily photo sharing.
12 to 18 GB
Two week multi city tour
Heavy navigation across regions plus video and social uploads.
20 GB or more
Remote work base in Japan
Video calls, tethering and cloud uploads alongside daily exploring.
Data per hour, by activity
- Maps and navigation
- 5 MB
- Camera translation
- 50 to 100 MB per hour of active use
- Social media and browsing
- 100 to 150 MB
- Standard video streaming
- 700 MB to 1 GB
- Video calls
- 500 MB to 1.5 GB
Use offline translation packs for menus, but keep your eSIM active for real time transit routing, which is essential given how complex the rail network is.
How to set up a Japan eSIM
A Roamix Japan eSIM is best installed over wifi before departure. It activates automatically when you connect to a Japanese network on arrival, so you are online before you reach the train platform.
- 1
Buy your plan on the Roamix Japan eSIM page before you travel.
- 2
Install the eSIM over wifi by scanning the QR code.
- 3
Keep your home SIM for calls and set Roamix as your data line.
- 4
Enable data roaming for the Roamix line only.
- 5
Land in Japan and the eSIM connects automatically to a local network.
Works on eSIM capable phones including iPhone XS and newer, Google Pixel 3 and newer, and recent Samsung Galaxy models. The phone must be carrier unlocked.
The correct APN is set automatically on most devices. If data does not start, apply the APN from your order and toggle airplane mode.
No data on arrival usually means data roaming is off for the Roamix line or the network needs manual selection. Restart the phone after checking both.
Visa and entry for Japan
Many nationalities enter Japan visa free for short tourist stays, typically up to 90 days, but eligibility varies by passport.
- eVisa or ETA
- Visa free travellers do not need an advance visa, though Japan has been rolling out digital arrival and customs procedures worth completing online.
- Passport validity
- Your passport should be valid for the duration of your stay.
- Onward ticket
- Proof of onward travel and accommodation details may be requested at immigration.
Complete any digital arrival forms in advance and keep them accessible, using your Roamix eSIM to present QR codes at the airport.
Rules change. Confirm current requirements with official Japanese immigration sources before travel.
When you land in Japan
0 of 5 done
How people message here
LINE is the dominant messaging app in Japan for both chat and calls, far ahead of WhatsApp or SMS.
Do you need a local number?
You generally do not need a local number as a tourist. A Roamix data line covers app based messaging and calls, though some local services prefer a Japanese number.
Install LINE before you arrive if you plan to coordinate with locals, guides or hosts.
Airports in Japan
NRT
Narita International Airport
Tokyo
Free unlimited wifi across all terminals.
Activate your Roamix eSIM before landing so you can buy a Narita Express or Skyliner ticket and reserve a seat the moment you clear customs.
HND
Tokyo Haneda International
Tokyo
Free wifi in the international terminal. Faster connections and closer to central Tokyo than Narita.
Haneda is 30 minutes from central Tokyo by monorail or Keikyu line. Your Suica in Apple Wallet works on both without any setup. Roamix data lets you navigate the transfer and check live train departure boards as you walk.
KIX
Kansai International Airport
Osaka
Free wifi available. The Haruka express to Kyoto and the Nankai Rapi:t to Namba both depart from the airport station.
Stay connected to navigate the train versus bus choice into Osaka and Kyoto without queuing for a SIM counter. Your Roamix eSIM connects on Docomo immediately on arrival.
CTS
Chitose Airport (Sapporo)
Sapporo
Free wifi in the main terminal. Connection is reliable and fast for a regional airport.
New Chitose is the gateway to Niseko ski resorts, Furano lavender fields, and Hokkaido's food scene. The limited express Hokkaido Liner connects to Sapporo in 36 minutes, and your Suica card works on the entire Hokkaido Rail network with Roamix data for real-time schedules.
Apps and internet access in Japan
Japan has an open internet, so all common apps work normally on a Roamix eSIM.
There is no censorship of messaging, social media or search. No VPN is required for any mainstream service.
LINE, works
The dominant chat app in Japan, fully supported.
WhatsApp, works
Works for international contacts.
Google Maps and Translate, works
Essential and unrestricted.
Social media, works
Instagram, X and TikTok all work.
Getting around Japan
Japan's transport is the best in the world, but it is dense and complex, so a connected routing app is essential to navigate it smoothly.
Trains and subways
The backbone of travel, fully covered by mobile signal including tunnels. Use a routing app for the fastest transfers.
Shinkansen
High speed rail with coverage along most routes, so you can work or stream between cities.
IC cards
Tap a Suica or Pasmo, often loaded into your phone wallet, for trains, buses and shops. A connected wallet makes top ups easy.
Taxis
Reliable but pricey. The GO app needs data to hail and pay, as Uber availability is limited.
Tap a Suica or Pasmo IC card, often loaded into your phone wallet, for trains, buses and many shops. Keep your phone charged and connected.
Money and payments in Japan
Japan still uses cash more than most developed countries, especially at small shops and shrines, though IC cards and contactless are growing. Keep some yen on hand.
- Cards and cash
- Major shops, hotels and chains take cards and contactless, but small restaurants, temples and rural spots are often cash only.
- ATMs
- Convenience store and post office ATMs reliably accept foreign cards. Choose to be charged in yen to avoid poor dynamic conversion.
- Payment apps
- Suica, Pasmo and contactless cards cover most transit and many shops. A connected phone keeps your wallet topped up and working.
- Tipping
- Tipping is not customary and can cause confusion. Exceptional service is simply expected, so do not leave extra cash.
Daily budget
Budget travellers spend around 8,000 to 12,000 JPY a day, mid range 15,000 to 30,000 JPY, with Tokyo at the higher end.
Local tips for Japan
- Language
- English signage is improving but limited off the tourist trail. A connected camera translation app is genuinely useful for menus and tickets.
- Food
- From convenience store classics to multi Michelin star sushi, Japan's food is a highlight in itself. Many top restaurants require reservations made in advance online.
- Plugs
- 100V, Type A and Type B plugs
Apps worth having
Japan Travel by NAVITIME
transit
The clearest English route planner for Japan's complex rail and metro systems.
Google Translate
customs
Camera translation of menus, signs and tickets in real time.
GO
rideshare
The main taxi hailing app in Japanese cities where Uber is limited.
Safety and health in Japan
Japan is among the safest countries in the world, with very low crime. The main considerations are natural events like earthquakes and typhoons.
- Stay reachable
- Keep your Roamix eSIM active to receive official earthquake and typhoon alerts and to follow evacuation guidance in real time.
- Health
- Healthcare is excellent. Summers are hot and humid, so use a weather app and stay hydrated.
- Tap water
- Tap water is safe to drink throughout Japan.
Networks and coverage in Japan
Japan has some of the densest, fastest and most reliable mobile coverage on earth, including deep inside subway tunnels and bullet train carriages. A Roamix Japan eSIM connects to a premium local network the second you land, so navigation, translation and transit apps work everywhere from central Tokyo to mountain towns.
NTT Docomo
The broadest national reach, strong in rural areas, mountains and on the Shinkansen routes.
SoftBank
Excellent urban speeds and dense city coverage across the major metros.
au by KDDI
Strong nationwide footprint and a solid alternative in regional Japan.
- Typical speeds
- Urban 5G commonly delivers 100 to 300 Mbps, with strong 4G nationwide.
- 5G
- 5G blankets the major metros and runs along most Shinkansen lines.
Japan's mobile data is fast almost everywhere, so prioritise a generous data allowance over chasing a specific carrier. The translation and transit apps you will lean on are data hungry.
Coverage is near universal, but deep in the Japanese Alps, remote islands and some hiking trails you can still drop to no signal, so cache maps before a backcountry day. Japanese networks use widely supported LTE and 5G bands, so a Roamix eSIM works on virtually any recent unlocked phone.
Where to go in Japan
Japan packs incredible variety into a compact, hyper efficient country. Trains run to the minute, signage is improving for visitors but still often Japanese only, and a connected phone for translation and navigation makes the difference between smooth and stressful. A Roamix eSIM keeps you online from the airport express to the last subway.
Best time to visit
Late March to early April for cherry blossom and November for autumn colours. Both are stunning and busy, so book early.
Kanto
Tokyo and its vast surrounds, the neon, food and shopping heart of modern Japan. From Shinjuku's corridors to the meditative paths of Yanaka, from Akihabara electronics to Nakameguro cherry blossoms, this region rewards weeks of exploration.
- Shibuya Crossing
- Senso-ji Temple
- Mount Fuji day trips
- Harajuku and Omotesando
- teamLab Borderless
World class 5G everywhere, including underground and on trains. Docomo covers almost every Tokyo Metro and Toei subway station and most inter-station tunnels.
Kansai
Kyoto, Osaka and Nara, the cultural core with temples, street food and deer parks. Home to 1,600 Buddhist temples and Shinto shrines including Fushimi Inari, Kinkaku-ji, and Arashiyama's bamboo grove.
- Fushimi Inari Shrine
- Dotonbori
- Nara Park
- Arashiyama Bamboo Grove
- Kinkaku-ji (Golden Pavilion)
Excellent coverage in all three cities and on the connecting rail lines. Temple districts including Higashiyama and Arashiyama have strong Docomo signal.
Hokkaido
Japan's northernmost island known for powder snow, hot springs and wide open nature. Ski resorts at Niseko and Rusutsu, lavender fields in Furano, and the wilderness of Daisetsuzan National Park.
- Niseko ski slopes
- Sapporo Snow Festival venue (Odori Park)
- Furano lavender fields
- Otaru Canal
- Daisetsuzan National Park
Strong in towns and resorts. Niseko ski slopes have Docomo 4G on the mountain. Rural drives between Furano and Biei can have gaps on SoftBank but are reliable on Docomo. Deep wilderness areas of Daisetsuzan National Park go off grid.
Tohoku and the Japan Alps
Tohoku is Japan's undiscovered north, with onsen towns, samurai castle towns, and the Shirakami-Sanchi beech forest. The Japan Alps contain Shirakawa-go's UNESCO gasshozukuri farmhouses and the mountain resort of Kamikochi.
- Shirakawa-go and Ainokura
- Kamikochi valley
- Matsumoto Castle
- Zao Onsen ski resort
- Nebuta Festival site (Aomori city)
Major cities including Sendai, Hirosaki, and Aomori are well covered by Docomo. Mountain areas like Kamikochi have Docomo signal at the terminal and along the main valley but not on high alpine routes. Shirakawa-go village is covered.
Kyushu and Okinawa
Kyushu combines ancient history at Dazaifu Tenmangu and Nagasaki's Peace Park, volcanic drama at Mount Aso, and some of Japan's best ramen in Fukuoka's Hakata district. Okinawa is a subtropical island chain with coral reefs and distinct Ryukyu culture.
- Fukuoka's Hakata Ramen stalls
- Mount Aso caldera
- Nagasaki Peace Park
- Naha's Kokusai Street
- Cape Manzamo, Okinawa
Excellent coverage in Fukuoka, Nagasaki, Kagoshima, and Naha. Mount Aso caldera rim has variable coverage. Remote Iriomote and Yonaguni islands have limited signal.
Off the beaten path
Ancient UNESCO listed pilgrimage paths through cedar forests and remote shrines, including the Nakahechi main route between Takijiri-oji and Hongu Taisha.
Signal: Signal in the trailhead villages but frequent dead zones along the forest routes. The Nakahechi route has coverage at Takijiri-oji trailhead and Hongu Taisha but several mountain sections in between have limited or no signal on any carrier.
A UNESCO World Heritage island covered in ancient cedar trees, some over 3,000 years old. The Jomon Sugi cedar, estimated at 2,170 to 7,200 years old, is one of Japan's most moving natural sights and inspired the forests in Princess Mononoke.
Signal: Docomo 4G in Miyanoura port town and Yakusugi Land forest area. The Jomon Sugi trail above 1,200 metres has limited coverage. Download the Yakushima trail map and bus schedule in Miyanoura before hiking.
A perfectly preserved mountain village of gassho-zukuri farmhouses, their steep thatched roofs built to shed Gifu's exceptional winter snowfall. In winter, the village is lit by traditional lanterns and looks like something from a woodblock print.
Signal: Docomo 4G throughout the village. The hillside Shiroyama observation deck has signal. Winter snow can reduce signal slightly in some gassho farmhouse areas.
A small island in the Seto Inland Sea transformed into one of the world's most celebrated art destinations, with Yayoi Kusama's Yellow Pumpkin on the jetty, Tadao Ando's Chichu Art Museum embedded in a hillside, and Benesse House hotel surrounded by site-specific art.
Signal: Docomo 4G covers Honmura village and the Benesse Art Site main buildings. The hillside paths between museums have intermittent coverage.
Called 'Little Kyoto', Kanazawa escaped World War II bombing and retains its Edo-period geisha districts, samurai residences, and Kenroku-en, one of Japan's three great gardens. The Omicho Market serves the freshest crab in Japan.
Signal: Excellent Docomo 4G and 5G throughout Kanazawa city. Kenroku-en garden, the Higashi Chaya geisha district, and 21st Century Museum are all fully covered.
Rolling patchwork fields of lavender, sunflowers, and poppies from June to August. Farm Tomita's lavender fields in Furano are iconic. Biei's Blue Pond, coloured an unreal turquoise by dissolved aluminium, is one of Japan's most photographed spots.
Signal: Docomo 4G in Biei town and Furano city. The Flower Road between farms has intermittent Docomo coverage but drops on SoftBank. Docomo consistently outperforms other carriers on Hokkaido rural drives.
One of Japan's most accessible mountain escapes, 90 minutes from Tokyo by Romancecar express. Views of Mount Fuji over Lake Ashi, the Owakudani volcanic hot springs, ryokan onsen culture, and the Hakone Open Air Museum.
Signal: Docomo 4G throughout the main Hakone tourist loop including Gora, Owakudani, and Lake Ashi. Ropeway signal can be intermittent in the Owakudani volcanic valley.
The Peace Memorial Park and A-Bomb Dome are among the most powerful historical sites in the world. Miyajima's floating torii gate of Itsukushima Shrine, 17 minutes by ferry, is one of Japan's most iconic images.
Signal: Excellent Docomo 4G throughout Hiroshima city. Miyajima island has strong coverage at Itsukushima Shrine. The mountain trail to Mount Misen has coverage at the ropeway station and summit.
A well-preserved Edo-period merchant town in the Japan Alps, famous for its spring and autumn festivals among the most beautiful in Japan, Hida beef, sake breweries, and proximity to Shirakawa-go.
Signal: Docomo 4G throughout Takayama city and Sanmachi Suji historic district. The Hida Folk Village open-air museum has full coverage.
Japan's only subtropical islands, with coral reefs that rival Southeast Asia, Ryukyu castle ruins at Shuri Castle, and a distinct indigenous culture. Kerama Islands offer world-class clear-water snorkelling 30 minutes by ferry from Naha.
Signal: Excellent Docomo 4G on Okinawa main island including Naha, Chatan American Village, and Cape Manzamo. Kerama Islands have Docomo coverage in the main towns; offshore and diving sites have no signal.
Events and seasons in Japan
Early February
Sapporo Snow Festival
Odori Park and Susukino, Sapporo
One of Japan's most famous winter events, drawing 2 million visitors. Teams from around the world create enormous ice and snow sculptures in Odori Park, while the Susukino venue features illuminated ice sculptures. Temperatures typically sit at minus 5C to minus 10C.
Late March to April
Cherry Blossom Season
Nationwide
The sakura bloom sweeps north across the country, drawing huge crowds to parks and riversides. Ueno Park and Shinjuku Gyoen in Tokyo, Maruyama Park in Kyoto, and Hirosaki Castle in Aomori are the most iconic hanami destinations.
July
Gion Matsuri
Kyoto
One of Japan's three great festivals, dating to 869 AD. The Yamaboko Junko procession on July 17 fills Kyoto's Shijo and Kawaramachi streets with towering wheeled floats and thousands of participants in traditional costume. The Yoiyama evenings from July 14 to 16 are the most atmospheric.
July and August
Hanabi (Fireworks) Season
Nationwide
Japan's summer fireworks festivals are among the world's most sophisticated. The Sumida River Fireworks in Tokyo (late July, 20,000 shells), Naniwa Yodogawa in Osaka (late July), and Akita Omagari Competition (late August, Japan's largest professional fireworks competition) are the major events.
Year-round, major events July to August and November to January
Tokyo Disney Resort Seasonal Events
Urayasu, Chiba (near Tokyo)
Tokyo Disneyland and DisneySea consistently rank among Asia's most visited theme parks. Seasonal events including Halloween from September to October, Christmas from November to December, and the summer Electrical Parade Dreamlights attract global visitors.
August 2 to 7
Nebuta Matsuri
Aomori city, Tohoku
One of Tohoku's four great summer festivals. Enormous illuminated paper float sculptures depicting warriors and mythological figures are paraded through Aomori's streets at night, accompanied by haneto dancers who leap alongside the floats.
August 12 to 15
Awa Odori
Tokushima city, Shikoku
Japan's most exuberant dance festival, with over 100,000 dancers and 1.3 million spectators over four days. Choreographed and freestyle troupes parade through Tokushima's streets in yukata to the hypnotic Awa Odori melody.
Late September to late November
Koyo (Autumn Foliage) Season
Nationwide, peaks in Kyoto and Nikko in November
Japan's autumn colour season rivals sakura for travel intensity. Nikko's temple complex in late October, Kyoto's Eikan-do and Tofuku-ji in mid November, and Hokkaido's Daisetsuzan National Park in late September are the top destinations.
October 9 to 10
Takayama Autumn Festival
Takayama, Gifu
One of Japan's three most beautiful festivals, alongside Gion Matsuri and Chichibu Night Festival. Elaborate Edo-period yatai festival floats are wheeled through Takayama's streets, some equipped with mechanical karakuri puppets.
October 22
Jidai Matsuri
Kyoto
The Festival of the Ages, created in 1895 to celebrate Kyoto's history. A two-kilometre procession of 2,000 participants dressed in historically accurate court costumes from each period of Japanese history, from the Meiji Restoration back to the 8th century.
Through the year
- Spring
- March to May is the cherry blossom season, mild and beautiful but the busiest travel window.
- Summer
- June to August is hot and humid with a rainy season in early summer, plus vibrant festivals and fireworks nationwide.
- Fall
- September to November brings cooler air and spectacular autumn foliage, one of the best times to visit.
- Winter
- December to February is cold in the north with world class powder snow, while the south stays mild.
Working remotely from Japan
Japan is a top remote work base with superb internet, abundant coworking and cafes, though peak season accommodation is pricey.
- Connection
- Mobile and fixed speeds easily handle video calls and tethering. A Roamix plan of 20 GB or more suits a working week alongside sightseeing.
Convenience stores and station areas have reliable signal, so your eSIM doubles as a dependable mobile office.
