How to Get a Japanese SIM, eSIM, or Phone Number in Japan

The first thing to clear up is this:

“I need a SIM” is not a specific enough question in Japan.

What you might actually need is one of four very different things:

data only
SMS
a real Japanese 070 / 080 / 090 phone number
a plan you can get without a 在留カード (zairyu card), or Residence Card

That is why this topic gets messy so fast. A tourist can often get data quickly. A digital nomad can get online but still struggle to get a usable local number. A student or engineer with a Residence Card suddenly has far more options. And once you are properly settled, the mainstream Japanese carriers become much more realistic than the foreigner-friendly providers many newcomers start with.

This guide is meant to make that map clearer.

The First Split That Matters: Data-Only vs a Real Japanese Number

If you only need maps, messaging apps, tethering, and general internet access, a data-only eSIM is the easy side of the market.

If you need:

a Japanese number for bookings
local SMS verification
ordinary phone calls
the setup many Japanese services expect

then you are in the much stricter voice-capable category.

This is the part many people miss. eSIM does not automatically mean “easy” or “instant.” It just means the SIM is embedded in the device instead of being a physical card. A voice-capable eSIM can still require identity checks, pickup, or address matching.

Mobal explains this especially clearly. Its support page says that even for a digital Voice+Data eSIM, identity verification rules still apply, so the company cannot simply email the whole thing the way it can for a data-only eSIM.

Sakura Mobile says the same thing in a different way: its passport and pickup guidance explains that passport-based Voice+Data eSIM applications may still require in-person pickup or face-to-face ID confirmation, and that the fully online flow works only if you have a Residence Card, Japanese driver’s license, or My Number card with your Japanese address on it.

So the real question is not:

“SIM or eSIM?”

It is:

“Do I only need data, or do I need a voice/SMS setup with a real Japanese number?”

The Second Split: Passport-Friendly vs Resident-Document Carriers

The next divide is also more important than most people think.

Some providers are built for foreigners who may only have:

a passport
a short stay
no Residence Card yet

Others are built for people who already look like a normal Japanese resident customer on paper:

Residence Card
Japanese address
sometimes a My Number card or driver’s license

That is why the same person can often find a workable path with:

Mobal, Hanacell, or Sakura Mobile
but still not a clean fit for NTT Docomo, ahamo, Rakuten Mobile, UQ mobile, au, or Y!mobile

povo is the main exception to that simple split. Its normal voice-and-SMS side still behaves more like a resident-style carrier, but its data-only eSIM path is a real option for some short-stay or no-Residence-Card users. I will break that out separately below with KDDI’s traveler-focused Japan SIM.

What Changes by Stay Type

This is the most useful way to think about the problem.

Tourist or business traveler on 短期滞在 (tankitaizai)

A short-term visitor usually does not get a Residence Card. Japan’s Immigration Services Agency is clear that Temporary Visitor status is outside the group that receives a Residence Card.

That means:

mainstream resident-style carriers are usually a bad fit
data-only products are much easier
passport-friendly voice providers matter much more

Digital Nomad

This is one of the most misunderstood cases.

Japan’s Digital Nomad status also does not issue a Residence Card. The Immigration Services Agency says this directly on its Digital Nomad page.

So despite being a legal stay, it behaves more like a short-stay document problem than a normal resident setup problem.

That is why many digital nomads end up choosing between:

a passport-friendly voice provider
or a data-only eSIM plus their overseas number

Working Holiday

A Working Holiday holder usually does have a Residence Card, so the problem changes.

Now you are much closer to the resident side of the market, but you may still be missing:

enough time in Japan
a stable Japanese address
a cheap mainstream billing setup

So Working Holiday holders often have more options than tourists, but still not quite the same smooth path as a full-time employee who has already settled in.

Student

Students also usually have a Residence Card, which helps a lot.

But in practice, many students still start with foreigner-friendly providers because:

they want English support
they do not yet have all the downstream paperwork in place
they may not want to get locked into a more standard Japanese carrier immediately

Work visa holder / long-term resident

Once you have a Residence Card, a Japanese address, and a normal resident setup, the field opens up.

This is when the big Japanese options become much more realistic:

NTT Docomo
ahamo / irumo
Rakuten Mobile
KDDI group brands like au, povo, and UQ mobile
Y!mobile
IIJmio

Already settled resident

This is the “I started with Mobal / Sakura / Hanacell, but do I still need to?” stage.

For many people, the answer is:

probably not

Once you have the usual resident documents and you are comfortable with Japanese carrier flows, the big domestic carriers or budget resident plans often become more cost-effective.

The Providers That Work Best Without a Residence Card

If you are on a short stay, Digital Nomad status, or otherwise not in the normal resident-document flow yet, these are the providers worth understanding first.

Mobal

Mobal is one of the clearest examples of a provider built around foreigner needs.

Its site explicitly separates:

tourist products
long-term products

and says both its long-term and tourist voice plans can provide a real Japanese phone number, according to Mobal.

Its support materials also make the onboarding model very clear:

Voice+Data SIM / eSIM gives you a standard Japanese mobile number with a 070 / 080 / 090 prefix after activation, according to Mobal’s incoming-calls guidance.
the Voice+Data eSIM still uses an eSIM Access Code, which is shipped or collected in Japan because identity verification still applies to voice-capable services, according to Mobal’s support page.
if you choose pickup, Mobal says you can verify identity by showing your passport and order confirmation at the collection point, again on its support page.

So if you are asking:

“Can I get a real Japanese number without a Residence Card?”

Mobal is one of the stronger primary-source-backed answers in the market.

Hanacell

Hanacell is especially interesting because it is very explicit about serving overseas residents and temporary returnees.

Its Japan SIM page says:

you can contract with a passport
it provides a Japanese mobile number beginning with 060 / 070 / 080 / 090
the plan is designed so that you can keep the same SIM, eSIM, and number across return trips, with some important eSIM caveats

Hanacell says this on its Japan SIM page.

It also explains one of those caveats clearly:

its Japan eSIM uses a new number
existing physical Japan SIM numbers cannot simply be converted into the eSIM version

That detail appears in Hanacell’s support FAQ.

So Hanacell is one of the better fits for:

temporary stays
overseas residents returning to Japan
people who want a real Japanese number without going fully into a resident-carrier contract

Sakura Mobile

Sakura Mobile sits somewhere between “foreigner-friendly workaround” and “resident-capable mainstream alternative.”

Its support pages show that for Monthly Voice+Data eSIM:

if you have a document with your Japanese address, the process can be more online-friendly
if you are using only a passport or another document without your current Japanese address, the process may require office or counter pickup
if you are outside Japan, receipt of the eSIM still depends on in-person collection rules tied to ID verification

Sakura Mobile’s eSIM delivery page shows this directly.

It also says that if you sign up with a passport, the process cannot be entirely online because of the face-to-face ID requirement for that case, according to Sakura Mobile’s pickup explanation.

So Sakura Mobile can work well, but it is a little less “friction-free” than some people assume when they hear the word eSIM.

The Cheap Option Many People Really Want: Data-Only eSIM

If your real need is simply:

internet
maps
messaging apps
tethering

then a data-only eSIM is usually the easiest answer.

KDDI / povo’s traveler-side option

KDDI’s official newsroom pages are useful here because they show that povo now has a traveler-focused product called Japan SIM for foreign visitors.

KDDI says:

Japan SIM is a data-only eSIM for foreign travelers
it can be purchased online before travel
it can also be sold at Lawson stores

This comes from KDDI’s official newsroom announcement.

This is one of the clearest official signs that Japan’s mobile market now explicitly separates:

traveler data eSIM
from normal resident-style mobile contracts

povo data-only for general use

povo’s own procedure pages also make another important point:

its data-only plan can be opened without identity documents
it is eSIM only
it does not support calls or SMS

That is on povo’s data-only procedure page.

That is great for people who only need data.

But it is not the answer if what you really needed was:

a local phone number
SMS verification
or a voice line

And there is one more wrinkle: povo’s procedure page says a data-only eSIM still requires another voice-capable line that can receive SMS for some parts of the process.

So even the “easy” option is not always as standalone as people hope.

When the Big Japanese Carriers Become Realistic

This is the part many foreigners care about after the first month or two.

Once you have a more normal resident setup, these options become much more realistic.

NTT Docomo and its online brands

NTT Docomo’s official support pages show the resident-document pattern very clearly.

For example:

Docomo’s shop procedures accept 在留カード plus supporting documents in foreign-national cases.
ahamo’s support pages tell foreign customers to use a 在留カード for identity confirmation.
irumo’s requirements page says that for eSIM, the accepted identity documents are limited to items including 在留カード.
Docomo’s online shop guidance also notes that foreign nationals should prepare identity documents showing the period of stay.

So the Docomo side of the market is much easier once you are clearly in long-term resident territory.

Rakuten Mobile

Rakuten Mobile is one of the more foreigner-accessible mainstream carriers online, but it is still resident-document based.

Rakuten says:

foreign nationals can use 在留カード or 特別永住者証明書 for eKYC
foreign nationals are supported in its Simple Mobile ID Verification flow for eSIM

Rakuten explains this on both its eSIM product page and its eKYC flow page.

That makes Rakuten a strong “I now have the proper documents and want a mainstream eSIM” option.

KDDI group: au, povo, UQ mobile

This is where it helps to think in group logic.

KDDI covers:

au
povo
UQ mobile

All three have different price and onboarding patterns, but the official identity pages show the same broad rule: once you are in the resident-document world, they become realistic.

Examples:

au Online Shop allows online identity checks using 在留カード among its supported ID types, but says the address on the ID must match your current address for online contracts, according to au’s subscription-preparation page.
UQ mobile says that for eSIM-only contracts, the online flow uses photo-based identity verification, and foreign nationals can use 在留カード, according to its document guide.
UQ mobile also says overseas applications cannot be completed because the required one-time password SMS cannot be received abroad, according to its overseas application notice.

This is a good example of why resident carriers are not just about having the right visa. They also assume:

you are applying from Japan
your address is already in order
your ID and online verification setup line up cleanly

Y!mobile and the “Yahoo” confusion

If you say “Yahoo” in Japan mobile-contract conversations, people often really mean Y!mobile.

That is the actual carrier brand.

Y!mobile’s official pages say:

online eSIM applications use smartphone-based identity verification
for foreign nationals, the required documents depend on status
non-permanent statuses often need 在留カード + foreign passport

That comes from Y!mobile’s required-documents page, eSIM flow page, and foreign-national support page.

So Y!mobile is very much in the resident-style carrier camp, not the “passport-only tourist workaround” camp.

IIJmio

IIJmio matters because it is one of the more flexible lower-cost options once you are settled.

Its official eSIM page is useful for one simple reason: it explicitly offers both:

voice eSIM
data eSIM

IIJmio lists that directly on its eSIM page.

That makes it a good “I understand what I need now” carrier.

If you only want cheap data, IIJmio has that.

If you want a proper voice-capable eSIM, IIJmio also has that.

But, like the other resident-side carriers, this is much more of a normal resident setup than a short-stay workaround.

So What Should You Actually Choose?

Here is the version I would use in real life.

If you are a tourist or short-stay business traveler

Need only data → a traveler data-only eSIM is the cleanest answer
Need a real Japanese number → look at passport-friendly providers like Mobal, Hanacell, or sometimes Sakura Mobile
Do not assume Docomo, Rakuten, UQ, au, Y!mobile, or normal povo voice plans are meant for this situation

If you are on Digital Nomad status

treat your setup problem much closer to the tourist side than the normal resident side
data-only is easiest
Mobal / Hanacell / Sakura Mobile are the providers worth checking if you need a real local number

If you are on Working Holiday

if you need something fast and low-friction, a foreigner-friendly provider is still a strong first move
once your resident setup is stable, mainstream carriers start to make more sense

If you are a student or long-term employee who just arrived

you can either start with a foreigner-friendly provider for speed
or go directly to a mainstream carrier if your Residence Card, address, and identity documents are already in good shape

If you are already settled in Japan

this is when Rakuten Mobile, UQ mobile, au, Docomo / ahamo / irumo, Y!mobile, and IIJmio deserve serious comparison

The Best Practical Recommendation by Situation

Situation	Best first move	Real Japanese number possible?	Residence Card needed?
Tourist / Temporary Visitor	Data-only traveler eSIM or passport-friendly voice provider	Yes, with the right provider	Not always
Digital Nomad	Data-only eSIM or passport-friendly voice provider	Sometimes	No Residence Card issued
Working Holiday	Foreigner-friendly provider first, resident carrier later	Yes	Usually yes
Student	Foreigner-friendly first or resident carrier if documents are ready	Yes	Usually yes
Work visa holder	Resident carrier becomes realistic quickly	Yes	Yes
Already settled resident	Compare mainstream carriers directly	Yes	Yes

The Short Version

If you only remember three things, make them these:

eSIM does not automatically mean easy. A voice-capable eSIM can still require identity verification, pickup, or address matching.
Data-only is the easy side of the market. A real Japanese number is the harder side.
Your stay type matters more than the marketing page. Tourists and digital nomads do not face the same mobile setup as residents, students, or full-time workers.

So if you are just trying to avoid the first-week paperwork wall:

tourist / digital nomad → start with the no-Residence-Card reality in mind
Working Holiday / student / worker → decide whether you want speed first or lower monthly cost first
settled resident → stop paying the “newcomer convenience tax” unless the foreigner-friendly support is still worth it to you