Japan is one of those destinations that stays with you long after you've left. The cherry blossom season from March to May, the organised chaos of Shibuya Crossing at rush hour, the first taste of ramen at a tiny counter restaurant at midnight—it's a country that rewards the curious and the adventurous in equal measure. Whether it's your first visit or your fifth, Japan always finds a way to surprise you.
But before you lose yourself in Kyoto's backstreets or Tokyo's electric shopping district, every traveller needs to answer one practical question - How do you stay connected?
Why Connectivity Matters in Japan
Japan is easy to navigate — if you have data. Google Maps will guide you through its labyrinthine train network (which, by the way, runs to the second, and seems to have a theme tune for each stop). Translation apps will decode menus. Booking platforms will snag you last-minute seats at that izakaya your hotel concierge swore was fully booked. Without a reliable data connection, navigating Japan goes from a breeze to a bewildering experience very quickly.
The old options — relying on WiFi wherever you can find it, buying a new SIM card, or paying your home carrier's eye-watering international roaming rates — still exist. But there's a far better way.
Enter the eSIM: Your Travel Companion Before You Even Board
An eSIM (embedded SIM) lets you add a local data plan to your phone digitally — no physical SIM card required, and no queuing at an airport kiosk after a 10-hour flight from Oz to Tokyo. You simply scan a QR code, follow a few setup steps, and your phone connects to a local Japanese 5G network the moment you land.
Using a FlexySim eSIM has become a go-to choice for many of our customers when travelling to Japan. With coverage in 170+ countries and straightforward, no-fuss activation, it takes the stress out of staying connected abroad. You can set it up from home before you depart, so when your plane touches down at Narita or Haneda, you're already online before you clear customs.
The setup is simple: purchase your FlexySim Japan eSIM plan online, receive a QR code and link by email, or via the FlexySim app scan, or click on the link it your phone's Settings, and turn on Data Roaming for the eSIM line. Your physical SIM stays in your phone the whole time, so you keep receiving calls and texts on your home number while FlexySim handles all your data. It's the best of both worlds.
Tokyo: Sensory Overload in the Best Possible Way
No Japan itinerary begins anywhere other than Tokyo. The city is simultaneously ancient and impossibly futuristic — a place where a 400-year-old shrine sits quietly in the shadow of a glass skyscraper, and nobody bats an eyelid.
Shinjuku is where most travellers land (via the JR Narita Express or the Keikyu line from Haneda), and it makes an excellent base. By day, explore the maze-like alleys of Omoide Yokocho — "Memory Lane" — where tiny yakitori stalls have been grilling skewers of chicken over charcoal since the 1940s. By night, the neon-lit madness of Kabukicho takes over, Tokyo's famous entertainment district that manages to be both overwhelming and utterly magnetic.
Don't miss Harajuku on a Sunday morning, when Takeshita Street fills with the most wonderfully eccentric fashion you'll see anywhere on earth. Follow it up with a peaceful walk through Yoyogi Park and a visit to the serene Meiji Shrine — a masterclass in contrasts that Tokyo does better than anywhere.
For a view that will genuinely take your breath away, head to the observation deck of the Tokyo Skytree at dusk. Watch the city light up below you for kilometres in every direction, and you'll understand exactly why Tokyo is considered one of the world's great metropolises.
FlexySim tip: Download the Suica or Pasmo app before you arrive and top up your IC card balance using mobile data — it works on virtually every train, bus, and even convenience store in Japan.
Kyoto: Where Old Japan Still Breathes
After Tokyo's relentless energy, Kyoto arrives like a long, slow exhale. Japan's ancient imperial capital is home to over 1,600 Buddhist temples, 400 Shinto shrines, and 17 UNESCO World Heritage Sites — making it the single greatest concentration of cultural heritage in the country.
Rise before dawn to walk the Fushimi Inari Taisha shrine trail before the crowds arrive. Thousands of vermilion torii gates wind up through forested mountainside, and in the early morning mist, the path feels genuinely otherworldly. By 9am it will be busy; by 7am, it's magic.
The Arashiyama bamboo grove deserves its reputation — the sound of wind moving through those towering stalks is unlike anything else. Pair it with a visit to the nearby Tenryu-ji temple gardens, one of the finest examples of Japanese landscape garden design in existence.
In the evenings, wander the stone-paved lanes of Gion, Kyoto's historic geisha district. If you're lucky (and quiet — please be quiet), you might spot a maiko hurrying between appointments as the paper lanterns flicker on. It's one of those moments that reminds you why you travelled this far.
FlexySim tip: Kyoto's bus system is excellent but confusing without data. Keep Google Maps running to navigate the routes — your FlexySim eSIM will handle it effortlessly.
Osaka: Eat Until You Can eat no more
Osaka has a saying: kuidaore — "eat until you drop." It's not a warning. It's an instruction.
Japan's third-largest city is its most unabashedly fun, a place where the food is extraordinary, the locals are famously warm and direct (by Japanese standards), and the atmosphere crackles with an infectious energy that feels different from Tokyo's polished cool.
Dotonbori is ground zero: a neon-drenched canal district where the smells of takoyaki (octopus balls), okonomiyaki (savoury pancakes), and kushikatsu (deep-fried skewers) compete for your attention at every turn. Follow the canal, eat everything, and regret nothing.
For a change of pace, the Nishiki Market — just a short train ride back toward Kyoto — is a narrow, covered street market stretching for five blocks, packed with vendors selling pickled vegetables, fresh tofu, matcha everything, and street food that will ruin supermarket snacks for you forever.
FlexySim tip: Use your data to check wait times on Tabelog (Japan's premier restaurant review app) — some of Osaka's most beloved restaurants have queues of over an hour, and knowing in advance lets you plan around them.
Beyond the Cities: Japan's Hidden Side
Japan rewards those who venture off the well-worn path.
Hakone, just 90 minutes from Tokyo by the Romancecar express train, offers steaming hot spring baths (onsen), dramatic views of Mount Fuji on clear days, and a traditional ryokan experience that is worth every yen. Soaking in an outdoor rotenburo bath as mist rolls over the volcanic mountains is an experience you'll carry home with you.
Hiroshima and Miyajima deserve more than a day trip. Hiroshima's Peace Memorial Museum is one of the most profound and important museums in the world — visit with the reverence it deserves. Then take the short ferry to Miyajima island, where the iconic floating torii gate of Itsukushima Shrine rises from the sea at high tide, and wild deer wander among the stalls selling maple-leaf-shaped momiji manju cakes.
If you're travelling between November and March, consider Hokkaido in the north. Japan's second-largest island transforms into a winter wonderland, and the powder snow at resorts like Niseko is internationally renowned. The Sapporo Snow Festival in February draws visitors from across Asia and beyond.
Practical Tips for Japan
Getting around: The Japan Rail Pass is worth it if you're travelling between cities. Buy it before you leave home — it cannot be purchased in Japan. IC cards (Suica/Pasmo) handle everything else.
Cash: Japan remains largely cash-based outside of major tourist areas and convenience stores. 7-Eleven ATMs accept international cards — use them liberally.
Etiquette: Remove your shoes when entering homes and many traditional restaurants. Don't tip — it can cause offence. Queue patiently for everything. Speak softly on public transport. These small courtesies go a long way.
Language: Outside Tokyo and Osaka, English signage becomes sparse. Translation apps like Google Translate's camera function are invaluable — another reason to ensure you have reliable mobile data throughout your trip.
Connectivity: As mentioned, a FlexySim Japan eSIM is the smartest way to stay connected throughout Japan. Set it up before you leave, activate it when you land, and let it run in the background while you focus on the experience. Plans are flexible, coverage is excellent across Japan's major cities and regions, and there are no nasty bill shocks when you get home. Visit flexysim.com to find the right plan for your trip.
Final Thoughts
Japan is not just a destination — it's a recalibration. It will challenge your assumptions about efficiency, beauty, food, and hospitality. And when you finally board your flight home, you'll already be wondering when you can go back.
Go prepared. Stay connected. And eat absolutely everything.
Safe travels — the FlexySim team.
Ready to go? Set up your Japan eSIM data plan at flexysim.com before you fly.
