Family or group trip to Japan: one eSIM each, or share one phone's hotspot?

By the 30k eSIM team in Asakusa. · October 18, 2026

By the 30k eSIM team · MIZUHIKO Co., Ltd., Asakusa, Tokyo

For most families and groups, one eSIM per phone works better than everyone using one person's hotspot. Separate eSIMs cost a little more, but each person can navigate, message and split off on their own, and nobody's phone battery has to carry the whole group. Sharing a hotspot makes sense for short trips, light use, or devices that cannot take an eSIM. On our shop you can buy 1 to 5 eSIMs of the same plan in one order, each with its own QR code.

The real difference

A personal hotspot turns one phone into a small Wi-Fi router. It is a phone setting, not part of the eSIM, and our plans allow it. Everything the connected devices use comes out of that one phone's data allowance.

One eSIM each

• Everyone has data wherever they are, including when the group splits up in a station, a department store or a theme park.
• Each person sees only their own usage, so one heavy user does not empty the plan for everyone.
• No single battery is drained by running a hotspot all day.
• Every phone must support eSIM and be carrier-unlocked. Check the compatibility list and how to check for a carrier lock for each phone, not just yours.

One phone sharing a hotspot

• One plan to buy and install, often a little cheaper in total.
• Connected devices only have data while they are close to the host phone. Wi-Fi range varies with walls, crowds and the phone, so treat it as "same room or walking together".
• Running a hotspot uses noticeably more battery on the host phone. A power bank becomes essential.
• If the host phone is lost, out of battery or in another carriage, nobody else has data.

What it costs: three worked examples

These estimates use the same usage model as our plan finder on the home page: light use around 150 MB a day (maps, messages, translation), typical use around 500 MB a day (plus social media and photos), with 15% added as margin. Prices are our current Japan plans.

1. Couple, 5 days, light use. Each needs about 0.9 GB. Separate: two 1GB / 7 days plans, ¥960 in total. Shared: one 3GB / 15 days plan, ¥780. Saving: ¥180.
2. Family of four, 7 days, two adults with typical use and two teenagers with light use. The adults need about 4 GB each, the teens about 1.2 GB each. Separate: four 5GB / 30 days plans in one order, ¥4,400 (or two 5GB and two 3GB in two orders, ¥3,760). Shared: about 10.5 GB in total, so one 20GB / 30 days plan, ¥2,880. Saving: roughly ¥900 to ¥1,500.
3. Five friends, 10 days, typical use. Each needs about 5.8 GB. Separate: five 10GB / 30 days plans in one order, ¥8,900. Shared: about 29 GB in total, so one 50GB / 30 days plan, ¥5,480. Saving: ¥3,420, but one phone would have to serve five people for ten days.

The saving grows with group size, and so does the inconvenience. For a couple the difference is small enough that separate eSIMs are almost always worth it.

When sharing a hotspot is the right call

• Short trips where you stay together all day, such as a two-day city stop with a fixed itinerary.
• Young children's tablets or older phones without eSIM support. Connect them to a parent's hotspot when needed.
• A laptop for occasional work. Tether it for an hour rather than buying it a separate plan, but watch the background updates and cloud sync that laptops run. See hotspot and tethering.

A common middle ground: each adult has their own eSIM, and the children's devices connect to a parent's hotspot when the family is together.

When separate eSIMs are clearly better

• Anyone plans to go off alone, even for an afternoon of shopping.
• Teenagers, who will use social media and video far more than the average estimate.
• Groups of three or more, because one host phone cannot realistically keep up with everyone's messages, maps and uploads all day.
• Mixed trip lengths, where someone leaves earlier or arrives later. Each eSIM's days start from its own first connection in Japan.

How ordering for a group works on our site

1. Choose the plan and set the quantity from 1 to 5. One order is one plan size; if people need different sizes, place a separate order for each size. For more than five phones, place a second order.
2. If a plan has fewer eSIMs in stock than the quantity you chose, checkout tells you how many are left, and you can lower the quantity or pick another size.
3. After payment, the order page lists each eSIM separately (eSIM 1 of 4, eSIM 2 of 4, and so on), each with its own QR code, one-tap iPhone link and manual install details. The same details come by email.
4. Install each eSIM on a different phone. The easiest way is for one person to open the order page on a laptop or their own phone and let each family member scan their QR code from that screen. Do it at home over Wi-Fi a day or two before you fly.

Two rules matter for groups. An installed eSIM stays on the phone it was installed on and cannot be moved, so make sure each code goes to the right person. And orders cannot be cancelled or refunded for a change of mind, even before an eSIM is installed, so work out how many eSIMs your group needs before you pay. Our iPhone and Android install guides cover the steps.

Tips for the trip

• Agree on a messaging group before you leave, since our plans are data only with no phone number; calls between you go through apps. See data-only eSIMs and phone numbers.
• Share live location in your maps or messaging app when you split up in big stations.
• Carry at least one power bank per two people, more if someone is hosting a hotspot.

For more on choosing plan sizes, see how much data you need, and for comparing eSIMs with rental routers for groups, see eSIM vs pocket Wi-Fi vs SIM card.

Last updated: 18 October 2026.

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