Japan eSIM

 Quality is non-negotiable in Japan. To ensure you have a signal everywhere from the neon lights of Tokyo to the temples of Kyoto, our eSIM connects to Japan’s premium networks: NTT Docomo, KDDI (au), or Softbank. Docomo is widely considered the gold standard for coverage, ensuring you stay connected even in rural Hokkaido or near Mount Fuji. 

Planning the trip? See our Japan eSIM plans, install in one tap before you fly, and land online. Free VPN included.

Yes, for convenience and freedom. Renting a Pocket Wi-Fi means carrying an extra device, charging two batteries, and worrying about losing it (and paying a fine). A Cellesim Japan eSIM is 100% digital. You don't need to pick up or return a device at Narita or Haneda airports. It is cheaper, lighter, and you can’t lose it! 

Yes. Japan’s infrastructure is world-class. You will have a stable 4G/5G signal while traveling on the Shinkansen between cities (e.g., Tokyo to Osaka). Even in the extensive underground subway networks of Tokyo and Osaka, mobile signal is available in stations and tunnels, allowing you to check Google Maps or train schedules via HyperDia or Navitime continuously. 

Planning the trip? See our Tokyo eSIM plans, install in one tap before you fly, and land online. Free VPN included.

No. This is a data-only eSIM. It does not come with a local +81 phone number. In Japan, getting a voice SIM as a tourist is very difficult due to regulations. However, most modern restaurants accept online reservations (via TableCheck or Google). For calls, you can use WhatsApp, LINE (very popular in Japan), or Skype using your high-speed data connection. 

Absolutely. Not speaking Japanese can be challenging, making instant translation apps essential. Our eSIM offers low-latency 4G/5G speeds, allowing you to use Google Lens to translate restaurant menus instantly or use voice translation to communicate with locals without any "loading" delays. 

Yes. Tethering (Personal Hotspot) is fully supported. This is perfect if you need to get some work done on your laptop at a cafe in Shibuya or if you want to share data with your family members to save money instead of buying multiple SIM cards. 

Yes. Your Cellesim eSIM for internet and your digital Suica/Pasmo/ICOCA cards (for trains and payments) work independently on the same iPhone or Android device. Using the eSIM for data will not interfere with your ability to tap your phone at ticket gates or convenience stores (Konbini). 

Yes, WhatsApp, FaceTime, and other video/voice calling apps work perfectly fine in Japan over mobile data.

Japan boasts a world-class mobile network infrastructure with excellent coverage across the country, including major cities like Tokyo, Osaka, and Kyoto, as well as popular tourist regions. Unlike certain other nations, there are absolutely no government restrictions or throttling on Voice over IP (VoIP) services here. This means you can freely make and receive calls, send messages, and enjoy high-quality video chats with friends and family using your preferred apps without needing any workarounds or a VPN.

When you use an eSIM for your trip, your device will automatically connect to the strongest available major network in Japan, ensuring reliable connectivity for all your communication needs. The exact network partner can vary by plan, but your VoIP apps will function normally.

 Absolutely. You must have an active internet connection to use the USJ App inside the park to claim your "Timed Entry e-Ticket" or "Standby Entry Ticket" for the Nintendo area. 

 Yes. During the official climbing season (July to September), major networks provide strong 4G coverage along the trails and even at the summit, allowing you to live-stream the sunrise (Goraiko).