How an eSIM works in Japan
You land at Narita, and the queue for a pocket WiFi counter is already twenty deep. Or you're hunting for the SIM kiosk, hoping the staff speaks English and the kiosk is open. An eSIM skips both: you buy online, scan a QR code, and your phone can connect to a supported network after installation and setup in Japan, no hardware, no counter, no swap of your home SIM.
Japan's mobile networks are among the most developed in the world. Wakamo's Japan eSIM plans connect to the country's major carriers: NTT docomo, KDDI/au, SoftBank, and Rakuten Mobile (network generation varies by plan; several run 5G-capable). Your phone rides these networks as a roaming data profile beside your regular SIM, so your normal phone number can remain available for calls and texts, subject to your device and home carrier.
Browse Japan eSIM plans: live prices are on the plan page.
Fetch before you travel; install at your plan’s start time
After payment, open your account to fetch your eSIM. Your order page then shows the QR code, manual details and device instructions, and can send them to you with “Email me my eSIM”.
- Validity from installation: installing starts the plan clock, even if you keep the line switched off.
- Validity from destination-network connection: the clock starts when the eSIM first connects to a supported network at your destination.
- Validity from provider purchase: the clock starts immediately when the provider purchase succeeds after you choose Fetch my eSIM. Buying a Wakamo voucher does not start this period. Waiting to install or connect does not delay it.
A plan purchase stays available for one year from the date of purchase. Installation deadlines vary by plan. Check your purchased plan’s timing and deadline before fetching or installing; do not assume a fixed window. If timing is unavailable, contact support before you fetch or install. You can install at home before you travel when your plan’s timing allows it. If the eSIM still doesn’t work after support helps, we’ll refund you. Refund policy.
Install on your device
Use a stable Wi-Fi connection and follow the iPhone or Android instructions on your secure installation page. Settings labels vary by device and software version. Choose the travel eSIM as your mobile data line and enable roaming for that line when you are ready to use it at your destination.
Your phone must support eSIM and be carrier-unlocked. Check your exact model on the compatibility page. Keeping your home SIM available for calls and texts depends on your device and carrier; home-carrier roaming charges may apply.
How much data do you actually need in Japan?
Japan-specific usage patterns matter here:
- Maps + translation + messaging: ~300–500 MB/day
- Add social posting + video calls: ~1 GB/day
- Heavy video/streaming: 2–3 GB/day or a daily plan
Wakamo sells Japan plans in two shapes: fixed plans, with one allowance over a set number of days, and daily plans, with a high-speed allowance each day. Your daily allowance resets in line with the carrier’s local midnight. After that allowance, the provider-stated fair-use rules apply. Sizes, validity and any reduced speed are per-plan values; the plan page shows the live figure for each. Compare all Japan plans and live prices.
The TikTok trap (read this before you buy)
Most Japan eSIMs route data through a Hong Kong exit point. Hong Kong has geo-restrictions that can block TikTok, Facebook, and some other apps. If those apps matter to you, pick a plan whose data leaves through Singapore instead. It costs slightly more. On Android, the TikTok app also checks your SIM's region, so a non-HK/non-China home SIM alongside helps; the web version works regardless. Every Japan plan is labeled with where its data leaves.
Network details travelers ask about
- Carriers: NTT docomo, KDDI/au, SoftBank, Rakuten Mobile (plan-dependent)
- Speeds: plans are sold as 3G/4G or 3G/4G/5G capable
- Hotspot: Supported (works if your device allows it), unless that plan says it is not supported
- Top-ups: many Japan plans are reloadable (more data within validity); each plan page says whether top-up is supported. Day extensions are coming soon to Wakamo.
Where to eat (curated recommendations)
A few food stops we recommend to travelers, curated from public tourism-board and official venue sources, not Wakamo-verified facts:
- Tsukiji Outer Market (Tokyo): the outer market kept its seafood and street-food stalls when the wholesale market moved to Toyosu; go in the morning.
- Ichiran (nationwide chain, born in Fukuoka): solo-booth tonkotsu ramen ordered from a ticket machine; low-friction if you speak no Japanese.
- Kuromon Market (Osaka): covered market street near Nippombashi: seafood stalls, wagyu skewers, fruit stands.
- Nishiki Market (Kyoto): narrow shopping street of pickles, tofu, and street snacks near the downtown arcades.
For a longer look at what to eat on a first trip, see First Time in Japan: Things to Eat.
Things to do (curated recommendations)
First-timer classics, curated from official tourism sources: pick to fit your route:
- Fushimi Inari Shrine (Kyoto): the hillside path through thousands of vermilion torii gates; free to enter, quietest early morning.
- Meiji Shrine and Yoyogi Park (Tokyo): forested shrine grounds beside Harajuku.
- Osaka Castle Park (Osaka): castle tower museum and moat-side park; peak cherry-blossom spot in spring.
- Hiroshima Peace Memorial Park (Hiroshima): memorial park and museum; pairs with a half-day trip to Miyajima island.
Practical travel tips (curated)
Everyday logistics, curated from official operator sources:
- Load a Suica or PASMO IC card for trains, buses, and convenience-store purchases.
- Keep some cash: smaller restaurants and shrines stay cash-only; convenience-store ATMs accept many foreign cards.
- Last trains run around midnight on most urban lines; check the operator timetable before a late dinner.
FAQ
Does my iPhone/Android support eSIM? Check the compatibility page. Most iPhone XS and newer, and most recent Samsung/Pixel devices do.
Can I keep my home SIM in? Yes, that's the point. eSIM handles data; your number still works.
When should I install? You can install at home before you travel. If the plan starts when you install it, install when you want it to start. If it starts when you connect at your destination, installing earlier does not start the clock. If the eSIM still doesn’t work after support helps, we’ll refund you. Refund policy. Every plan shows whether its clock starts at installation, first connection, or successful provider purchase after Fetch my eSIM. Check timing before fetching or installing.
What if I run out of data? Reloadable plans can top up within validity. Non-reloadable plans simply stop, no surprise overage charges.
Wakamo plans for Japan
Live prices on the plan page: eSIM plans for Japan start at CA$0.99. Buy online, fetch your eSIM when you are ready, then install from the QR code on your order page.
Common questions
Short answers on setup, data, hotspot, plan types, and whether a phone can use an eSIM.
- When should I install my Japan eSIM, and when does the plan start?
- How much data do I need for 7, 10, or 14 days in Japan?
- Can I use hotspot or tethering with a Japan eSIM?
- How do fixed-data Japan eSIM plans, day passes, and top-ups differ?
- Does my phone support eSIM for Japan, and does it need to be unlocked?
Also worth reading
Sources
- Apple Support, set up eSIM. Installing an eSIM on iPhone, including QR-code and manual setup.
- Ichiran. The ramen recommendation and restaurant information.