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

Start with the SIM Finder.

Choose your stay type, whether you have a Residence Card, and whether you need a real Japanese 070 / 080 / 090 phone number. The result will point you toward the most realistic first options, then you can use the tables and carrier notes below to compare details.

This guide covers the common paths for:

tourists and short business trips
Digital Nomad status holders
Working Holiday holders
students
new employees and work-visa holders
long-term residents comparing mainstream carriers

The main split is simple: data-only eSIM if you just need internet, or voice + data if you need a real Japanese number for SMS, school, housing, banking, job hunting, or daily life.

SIM Finder

Answer a few questions to get a direct recommendation.

1What is your current situation?

2Do you need a real Japanese phone number?

3Do you have a Residence Card and a registered Japanese address?

Start Here: Choose by Situation

Your situation	Best first move	What usually works best	Jump to your section
Tourist / short business trip	Start with data-only eSIM unless you truly need a local number	KDDI Japan SIM, povo data-only, or passport-friendly voice providers like Mobal, Hanacell, or Sakura Mobile	Tourist / no-Residence-Card path
Digital Nomad	Treat this like a no-Residence-Card case, not a normal resident case	Data-only eSIM first; Mobal, Hanacell, or Sakura Mobile if you need a real number	Digital Nomad section
Working Holiday	If speed matters, start foreigner-friendly; if your paperwork is already clean, resident carriers are possible	Mobal, Sakura Mobile, or Hanacell first, then switch later if needed	Working Holiday section
Student	Decide whether you need a real number immediately for school, bank, job hunting, and daily life	Just arrived: Mobal, Sakura Mobile, or Hanacell. If your Residence Card and address are already ready: Rakuten Mobile, LINEMO, ahamo, or UQ mobile	Student section
New employee / work visa holder	Go straight to a resident carrier if your documents and address are ready	Rakuten Mobile, LINEMO, ahamo, UQ mobile, IIJmio	New employee section
Already settled resident	Compare resident carriers directly	Rakuten, ahamo, LINEMO, UQ, au, Docomo, Y!mobile, IIJmio	Long-term resident section

Before You Compare Carriers, Decide What You Actually Need

If you need only internet

You are in the easy part of the market.

A data-only eSIM is often enough if you only need:

maps
messaging apps
tethering
browsing

This is usually the right answer for:

tourists
short-stay business travelers
many digital nomads
anyone keeping their home-country number active

If you need a real Japanese number

You are in the harder part of the market.

You likely need this if you expect to use your phone for:

SMS verification
school and apartment forms
restaurant bookings
job hunting
bank or service signups
ordinary calls inside Japan

This is the split that matters most. A data-only eSIM can get you online quickly, but it does not solve the “I need a real local number” problem.

And eSIM does not automatically mean “easy.” Mobal’s support page and Sakura Mobile’s pickup guidance both make the same point: a voice-capable eSIM can still require identity verification, pickup, or a document that matches your Japanese address.

If You Do Not Have a Residence Card

This group includes most:

tourists
short-term business visitors
Digital Nomad status holders

Japan’s Immigration Services Agency is clear that Temporary Visitor status does not receive a Residence Card, and Japan’s Digital Nomad page says the same for that status as well, according to the Immigration Services Agency.

That changes everything.

Best no-Residence-Card path if you need only data

Start with a data-only eSIM.

The cleanest official examples are on the KDDI / povo side:

KDDI’s traveler-focused Japan SIM is a data-only eSIM for foreign visitors, according to KDDI’s official announcement.
povo’s own data-only procedure page says its data-only plan is eSIM only, does not support calls or SMS, and can be opened without identity documents.
Mobal’s 5G Unlimited Data Tourist eSIM is a travel-specific unlimited data eSIM aimed at visitors — a strong option if you want higher data limits without signing up for a phone line.

That is a very good fit if your real goal is just to get online.

One caveat: povo’s procedure page says some parts of the flow still require another voice-capable line that can receive SMS. So even this “easy” route is not always completely standalone.

Best no-Residence-Card path if you need a real Japanese number

This is where Mobal, Hanacell, and Sakura Mobile matter.

Provider	Why people choose it	Good fit for	Important catch
Mobal	Built for foreigners, real Japanese number, tourist and long-term products	Tourist, Digital Nomad, short-stay voice line	Voice eSIM still follows identity-verification rules
Hanacell	Passport-friendly, real number, useful for repeat Japan stays	Temporary stays and return visits	Japan eSIM uses a new number; existing physical SIM numbers do not simply convert
Sakura Mobile	English-speaking foreigner focus, Docomo network, real number, several delivery flows	Short-term and newcomer bridge use	Passport-based voice eSIM may still require pickup or face-to-face verification

If You Have a Residence Card

This group includes most:

Working Holiday holders
students
work visa holders
long-term residents

Once you have a Residence Card, a Japanese address, and documents that line up cleanly, the market changes fast.

You no longer have to shop only in the “foreigner workaround” category.

If You Are a Student

For students, the practical question is usually not “what is the absolute cheapest plan in Japan?”

It is:

“Do I need a real number immediately, or do I only need internet for the first week?”

If you just arrived and still need to sort out:

school paperwork
bank setup
apartment setup
part-time job applications
app verification

then starting with a plan that gives you a real Japanese number is usually the safer move.

That often means:

Mobal / Sakura Mobile / Hanacell if you want easier onboarding and English support
or a mainstream resident carrier if your Residence Card and address are already settled

If your paperwork is already in order, these are the most realistic resident-side options:

Rakuten Mobile if you want a mainstream online eSIM flow and a flexible plan
LINEMO if you use LINE heavily and want an online-only SoftBank-side plan
ahamo if you want a simpler Docomo-side plan and care about international roaming
UQ mobile or IIJmio if you care more about budget and plan structure

The main thing to avoid is buying a cheap data-only eSIM, then realizing a few days later that you actually need SMS and a real number.

If You Are on Digital Nomad Status

This one is simpler than people expect.

Because Digital Nomad status does not issue a Residence Card, you should usually think like a short-stay user, not like a normal resident.

That means:

if you need only internet, go data-only first
if you need a real Japanese number, check Mobal, Hanacell, or Sakura Mobile
do not start by trying to force a mainstream resident carrier into a situation it was not designed for

For many digital nomads, the most practical setup is:

Japanese data eSIM
plus your existing overseas number

If You Are on Working Holiday

Working Holiday is the in-between case.

You usually do have a Residence Card, but you may still be missing:

a stable address
a local credit-card / billing setup
confidence in Japanese support flows

So the best first move is often:

a foreigner-friendly provider if you want speed and low friction
or a resident carrier if you already have your address and identity documents lined up

Working Holiday holders often start on a bridge plan, then switch a month or two later once the rest of life in Japan is stable.

If You Are a New Employee or Long-Term Resident

This is the group that can often skip the “newcomer bridge plan” entirely.

If you already have:

a Residence Card
a Japanese address
documents that match

then it is reasonable to compare mainstream carriers from the start.

Provider Notes: Pros and Obvious Cons

Use this part after you already know your likely path. The goal is not to compare every telecom detail. It is to understand why each option might fit your situation, and what you should not expect from it.

Data-only eSIM

Service links: KDDI Japan SIM, povo data-only, Mobal Data-only eSIM

Typical pricing: Data-only pricing varies by provider and duration. As official examples, povo’s online Japan SIM lineup currently runs from ¥260 to ¥3,390, while Sakura Mobile’s travel eSIM starts from ¥3,300 tax included.

Good for: tourists, digital nomads, short stays, and anyone who only needs internet.

What it is: A data-only eSIM gives your phone mobile internet, but not a Japanese voice line. This is enough for Google Maps, translation apps, WhatsApp, LINE messaging, email, tethering, ride apps, and general browsing.

Choose data-only eSIM if…	Do not choose it if…
You are visiting Japan for days or weeks	You need Japanese SMS verification
You already have another phone number for calls and SMS	You need a number for school, bank, job hunting, or apartment paperwork
You care more about getting online quickly than having a local number	You expect Japanese services to call you

Pros: It is usually the fastest way to get connected. You can often buy before arrival or shortly after landing, and you avoid the heavier identity-verification flow that applies to voice-capable Japanese mobile numbers.

Obvious cons: No Japanese phone number, no Japanese SMS, and not enough if you need app verification, school forms, bank setup, job hunting, or local calls.

KDDI Japan SIM

Service link: KDDI / povo Japan SIM announcement

Typical pricing: The online Japan SIM lineup published by povo in March 2026 runs from ¥260 for a short unlimited-data topping bundle to ¥3,390 for an unlimited-data 7-day bundle. The Lawson store version is different: KDDI’s store announcement lists ¥2,200 to ¥4,580, plus an unlimited-data 7-day option at ¥4,500.

Good for: foreign visitors who want a traveler-focused data eSIM from a major Japanese telecom group.

What it is: Japan SIM is KDDI / povo’s traveler-side data eSIM. KDDI says it is for foreign travelers, can be bought online before travel, and is also sold through Lawson-related flows. It uses the povo 2.0 / au network side rather than a small travel-SIM reseller model.

Plan shape	Reader decision
Traveler data eSIM	Good when you are not a Japan resident and do not want a normal carrier contract
Fixed-duration / fixed-data or unlimited-style travel choices	Choose based on trip length and expected data use
Major Japanese telecom group	Useful if you prefer a carrier-backed travel product over a generic travel eSIM marketplace

Pros: This is a clean fit when you are visiting Japan and want mobile data from a major Japanese telecom group without applying for a normal resident mobile contract. KDDI has published fixed-data and unlimited-data options, so readers can choose by trip length and data use instead of signing up for a full phone plan.

Obvious cons: It is data-only, so it does not solve the real Japanese phone number or SMS problem.

povo data-only

Service link: povo data-only procedure

Typical pricing: The data-only route has no normal voice-plan monthly fee. You buy data toppings instead. For the traveler-facing online Japan SIM, current official examples range from ¥260 to ¥3,390. For regular povo use, topping prices change, so check the app or official page before choosing.

Good for: people who only need flexible data and can handle an app-based setup.

What it is: povo’s data-only path is different from a normal Japanese voice plan. povo says the data-only plan is eSIM only, does not support calls or SMS, and can be opened without identity documents.

povo data-only gives you	It does not give you
Mobile data through an app-based setup	Japanese phone number
No standard voice contract	Japanese SMS
A flexible backup or short-stay data line	A fully standalone setup if you have no SMS-capable line for verification

Pros: This is useful if you want a flexible, app-based data setup and do not need a permanent Japanese number. It can be attractive for short stays, backup data, or people who already have another phone number for SMS verification.

Obvious cons: It does not support calls or SMS. povo also says some flows require another voice-capable line that can receive SMS, so it may not be fully standalone for everyone.

Mobal

Service link: Voice+Data eSIM · Voice Lite eSIM · 5G Unlimited Data Tourist eSIM

Typical pricing: Mobal’s current public pages show Voice Lite at about ¥990/month after the SIM purchase fee, and long-term Voice+Data plans from ¥1,650 to ¥4,378/month depending on data allowance. The SIM/eSIM purchase fee varies by product and campaign, so check the checkout page before ordering.

Good for: people without a Residence Card who need a real Japanese number.

What it is: Mobal is one of the most practical answers when your real problem is, “I need a Japanese number, but I do not fit normal resident carrier paperwork yet.” It has tourist and long-term products, and its voice plans can provide a real Japanese mobile number.

Mobal option type	Best for
Tourist SIM / eSIM	Short-stay visitors who need data or a local number path
5G Unlimited Data Tourist eSIM	Tourists who want unlimited data without a phone number
Long-term Voice + Data	Students, Working Holiday holders, or new residents who need a real number before resident-carrier paperwork is easy
Pickup / delivery-based activation	People who can handle an identity-verification step in Japan

Pros: Mobal is built around foreigner onboarding, so the product explanation is easier to understand than many mainstream Japanese carrier pages. Mobal says its Voice+Data SIM / eSIM gives a standard Japanese mobile number with a 070 / 080 / 090 prefix after activation. That makes it useful for bookings, local calls, and cases where data-only is not enough.

Obvious cons: Voice-capable eSIM still follows identity-verification rules. You may need to receive or collect the eSIM access code in Japan instead of getting everything instantly by email.

Hanacell

Service link: Hanacell Japan SIM

Typical pricing: Hanacell prices this product in USD. Its Japan SIM page lists a US$69 SIM purchase price, US$0 monthly basic fee, US$12/year maintenance fee from the second year, and US$29 only in months when data is used for 3GB high-speed data, then lower-speed data. Calls and outgoing SMS are charged separately.

Good for: temporary stays, repeat Japan visits, and people who want to keep a Japanese number across trips.

What it is: Hanacell is aimed at people who need a Japanese number without entering the usual resident-carrier route. It is especially relevant for people who visit Japan repeatedly, live overseas but return to Japan, or want a Japanese number that can survive across trips.

Hanacell fits when…	Why
You live outside Japan but visit repeatedly	Keeping one Japan-side number can be more convenient than buying a new tourist SIM each trip
You need a passport-friendly path	Hanacell explicitly positions its Japan SIM around passport-based contracting
You care more about number continuity than the cheapest data	The value is the Japanese number and repeat-use setup, not only data price

Pros: Hanacell says you can contract with a passport and get a Japanese mobile number beginning with 060 / 070 / 080 / 090. For people who are not settled residents but still need a Japanese contact number, that is the main value.

Obvious cons: Its Japan eSIM uses a new number, and existing physical Japan SIM numbers cannot simply be converted into the eSIM version.

Sakura Mobile

Service links: Sakura Mobile overview, travel SIM / eSIM / Pocket WiFi, monthly mobile plans

Typical pricing: Sakura’s public travel page lists travel eSIM from ¥3,300 tax included, travel physical SIM from ¥3,850 tax included, and travel Pocket WiFi from ¥329/day tax included. For monthly products, Sakura lists Voice + Data from ¥3,278/month, Data-only from ¥2,728/month, and a ¥5,500 registration fee for monthly SIM/eSIM/Pocket WiFi/Home WiFi products.

Good for: newcomers who want English support, a real number, and a provider built around foreigner onboarding.

What it is: Sakura Mobile is not only a passport-friendly voice option. It is more like a foreigner-friendly connectivity provider for Japan: travel eSIM / SIM / Pocket WiFi for short stays, and monthly SIM / eSIM / Pocket WiFi products for people staying longer.

This matters because many readers do not only need “a SIM.” A tourist may need shared data for a family trip. A student may need a real Japanese number for school, bank, and apartment paperwork. A new worker may want English support for the first month before switching to a cheaper resident carrier.

Sakura option	Best for	What it solves
Travel eSIM / SIM	Tourists, short business trips, temporary visitors	Internet for a short stay without a normal resident contract
Travel Pocket WiFi	Families, groups, people with several devices	Shared internet without worrying about each phone’s SIM compatibility
Monthly Voice + Data SIM/eSIM	Students, Working Holiday holders, new residents	Real Japanese 070 / 080 / 090 number plus mobile data
Monthly Data-only SIM/eSIM	Tablets, work devices, backup internet	Extra data without a phone number
Monthly Pocket WiFi	Temporary housing, remote work, multiple devices	Portable high-capacity internet without changing your phone plan

Pros: Sakura Mobile is built for English-speaking foreigners, uses the NTT Docomo network for its monthly mobile plans, and its Voice + Data products provide a real Japanese 070 / 080 / 090 number. Its public monthly page also highlights data rollover, hotspot / tethering, no two-year commitment, full English support, various payment methods, and a student discount. Check the current conditions before relying on a discount, because campaign details can change.

For short stays, Sakura’s travel page also makes Pocket WiFi worth considering. If you are traveling with family, carrying multiple devices, or worried your phone may not support a Japanese eSIM/SIM cleanly, Pocket WiFi may be more practical than trying to configure every device separately.

Obvious cons: Passport-based Monthly Voice+Data eSIM applications may still require pickup or face-to-face identity verification. If you expected eSIM to mean fully online and instant, this can surprise you.

Sakura Mobile is also usually a convenience-and-support choice, not always the cheapest long-term resident choice. Once your Residence Card, address, payment method, and Japanese support comfort are stable, compare it again with Rakuten Mobile, LINEMO, UQ mobile, ahamo, or IIJmio.

Home WiFi and fiber are also available from Sakura Mobile, but I would treat those as a separate home-internet decision rather than the main answer to “which SIM should I apply for?”

Resident Carrier Notes

These options become much more realistic once you have a Residence Card, Japanese address, and documents that match.

Carrier	Good at	Best for
NTT Docomo	Traditional major-carrier setup, store support, flagship network	People who want the standard large-carrier experience
ahamo	Simpler online Docomo-side plan with international roaming	People who want a cleaner plan and travel sometimes
Rakuten Mobile	Flexible data logic, mainstream online eSIM, foreigner-friendly online flow	New residents who want a mainstream plan without too much friction
au	Full KDDI major-carrier plan	People who want a standard premium carrier setup
povo	Top-up model, including a separate data-only eSIM path	People who want flexibility more than a standard monthly bundle
UQ mobile	Lower-cost KDDI-side option	Budget-conscious residents who still want a mainstream group
Y!mobile	SoftBank-side sub-brand with store support and family / home discount logic	People who still want store support
LINEMO	SoftBank-quality low-cost online SIM, LINE use without eating into your data, online signup, credit-card payment, no store visit	Heavy LINE users who want a simple online setup
IIJmio	Cheap and flexible voice eSIM and data eSIM options	People optimizing for lower monthly cost

Resident-side carriers still expect resident-style documents.

Examples from official pages:

Docomo store and online procedures point foreign nationals to 在留カード and supporting identity documents, according to Docomo’s shop procedures and online guidance.
Rakuten says foreign nationals can use 在留カード or 特別永住者証明書 in its eKYC flows, according to Rakuten’s eSIM page and eKYC flow page.
au, UQ mobile, LINEMO, and Y!mobile all publish resident-document rules that center on 在留カード and address-matching requirements, according to their official procedure pages already linked in the Sources section below.

NTT Docomo

Service link: NTT Docomo

Typical pricing: Docomo’s current resident pricing depends heavily on plan and discounts. As official anchors, docomo mini is ¥2,750/month for 4GB or ¥3,850/month for 10GB before discounts, while docomo MAX is listed from ¥5,698 to ¥8,448/month depending on data use before discounts.

Good for: people who want the most traditional major-carrier experience and store support.

What it is: Docomo is the classic major-carrier choice. If you want the most standard Japanese telecom experience, store support, and a flagship network brand, Docomo is the conservative option.

Docomo path	Best for
Full Docomo plans such as data-heavy / unlimited-style plans	Families, heavy users, and people who want store support and bundled discounts
Smaller-data Docomo plans	People who want Docomo support but do not need large monthly data
ahamo instead of full Docomo	People who want Docomo-side simplicity and are comfortable online

Pros: Docomo is useful for people who want in-person help, family or household telecom bundling, and a plan relationship with a full-service carrier rather than an online-only brand. It is also the parent network context for ahamo, so some readers may prefer ahamo if they want Docomo-side coverage logic without the full shop-plan experience.

Obvious cons: Usually more paperwork-heavy and less cost-focused than online or budget brands. For many newcomers, ahamo or another simpler resident option may be easier once documents are ready.

ahamo

Service link: ahamo

Typical pricing: ahamo’s official plan page lists ¥2,970/month for 30GB and ¥4,950/month for 110GB with ahamo omori. The base plan includes 5-minute domestic calls, with extra call charges after that.

Good for: residents who want a simpler Docomo-side online plan and care about international roaming.

What it is: ahamo is Docomo’s simpler online-side plan. It is attractive when you want a mainstream Japanese carrier family, but do not want the full complexity of a traditional shop contract.

ahamo feature	Why it matters
Simple large-data base plan	Easier to understand than many discount-heavy carrier plans
Larger-data add-on path	Useful if 30GB-class usage is not enough
Overseas data included within plan conditions	Strong for residents who travel for work or family visits
Short domestic call benefit on the official plan	Convenient if you still make ordinary phone calls in Japan

Pros: ahamo is one of the easiest mainstream plans to understand. Its international roaming is a major reason many residents who travel choose it, because it reduces the need to buy a separate roaming product for every short trip. It is a good fit for workers, students, and residents who already have proper documents and want a cleaner plan.

Obvious cons: It is still a resident-document carrier. It is not a passport-only workaround for tourists or digital nomads.

Rakuten Mobile

Service link: Rakuten Mobile

Typical pricing: Rakuten’s current Rakuten SAIKYO Plan is usage-based: ¥1,078/month up to 3GB, ¥2,178/month from over 3GB to 20GB, and ¥3,278/month above 20GB under the main plan conditions. Rakuten Link and some discount programs can change the value calculation.

Good for: new residents who want a mainstream online plan with flexible data usage.

What it is: Rakuten Mobile is a mainstream Japanese mobile carrier with a flexible data model and online eSIM flow. For a new resident who has documents ready, it is often one of the easier mainstream options to understand.

Rakuten plan shape	Why it matters
Usage-based tiers around small, medium, and heavy data use	Good if your data use changes month to month
Unlimited-style top tier under current plan conditions	Attractive for people who use a lot of data and do not want to think too much
Rakuten Link calling	Useful if you understand the app-based calling flow and its limits
Rakuten ecosystem	More attractive if you already use Rakuten services

Pros: Rakuten supports foreign nationals in its eSIM / eKYC flow with a Residence Card or Special Permanent Resident Certificate. Its plan structure is useful if your data use changes month by month, and it can be attractive if you already use other Rakuten services.

Obvious cons: It is still a resident-document option. If you do not have a Residence Card and matching Japanese address, this is not the first place to start.

au

Service link: au

Typical pricing: au’s full-carrier pricing depends on plan and bundle discounts. As a current official anchor, au Value Link Plan is listed at ¥8,008/month before discounts, or ¥5,478/month when the listed family, home internet, and au PAY Card discounts apply.

Good for: people who want a full KDDI major-carrier setup.

What it is: au is KDDI’s full major-carrier brand. It is for people who want a standard premium carrier relationship, not just a lightweight online SIM.

au path	Best for
Data-heavy / unlimited-style au plans	People who use lots of data and want full carrier support
au financial / bundle-linked plans	People already using KDDI, au PAY, home internet, or family discount logic
UQ mobile instead	People who want KDDI-side service but care more about monthly cost

Pros: au makes the most sense if you value store support, family or household bundling, and a broader telecom relationship that can include home internet or other KDDI services. It is a normal resident option once your paperwork is stable.

Obvious cons: It is usually not the simplest or cheapest first answer for a newcomer who just wants a working phone quickly.

povo

Service link: povo

Typical pricing: povo has a ¥0 base-fee style, then you buy toppings. This makes monthly cost highly variable: it can be very low in months you do not buy data, or higher when you add large/long toppings. For traveler Japan SIM, current official online examples range from ¥260 to ¥3,390.

Good for: residents who like a top-up model and people who only need data through the separate data-only path.

What it is: povo is KDDI’s more flexible, top-up-style mobile brand. Instead of thinking mainly in fixed monthly bundles, you add the data or options you need.

povo style	Why it matters
Low base-fee / topping model	Useful if you want to buy data only when you need it
Short-term data toppings	Good for backup phones, travel bursts, or irregular usage
Voice-capable povo 2.0	Different from povo data-only; use this side only if you need calls/SMS
180-day paid-usage condition	Important if you keep povo as a backup and rarely buy toppings

Pros: povo can be good if your usage is irregular, if you like buying data as needed, or if you want a backup line. Its separate data-only path is also useful for people who do not need calls or SMS.

Obvious cons: The normal voice/SMS side is different from the data-only side. Do not choose data-only if you need a real Japanese number. Also, if you use povo only as a backup, remember the 180-day paid-usage / topping condition on povo’s official material.

UQ mobile

Service link: UQ mobile

Typical pricing: UQ’s current plan examples include Komikomi Plan Value at ¥3,828/month for 35GB with 10-minute domestic calls, and Tokutoku Plan 2 at ¥4,048/month before discounts. With listed home/payment/low-usage discounts, Tokutoku Plan 2 examples can drop to ¥1,628 to ¥2,728/month depending on data use.

Good for: residents who want a lower-cost KDDI-side option.

What it is: UQ mobile is KDDI’s lower-cost resident-side brand. It is often worth comparing if you want to stay in the KDDI group but do not need a full au plan.

UQ plan direction	Best for
Larger bundle plan with calls included under current conditions	People who want predictable data and some calling without full au pricing
Discount-sensitive plan	People who can use eligible home internet, payment, or usage discounts
au instead	People who want full major-carrier store / bundle experience
povo instead	People who want topping flexibility more than a monthly bundle

Pros: UQ mobile is more budget-oriented than full au and can be a sensible resident choice once your Residence Card, address, and payment setup are ready. It is a better comparison point than tourist eSIMs if you plan to stay in Japan.

Obvious cons: The online process still expects proper resident documents and address matching. UQ also says overseas applications cannot be completed because required one-time password SMS cannot be received abroad.

Y!mobile

Service link: Y!mobile

Typical pricing: Y!mobile’s Simple 3 plans are listed at ¥3,058/month for 5GB, ¥4,158/month for 30GB, and ¥5,258/month for 35GB before discounts as of May 2026. Its official plan page also says monthly base fees change from June 2, 2026, to ¥3,278, ¥4,378, and ¥5,478 respectively. With eligible home internet, card, family, or student-related discounts, the advertised payment can be much lower, but the conditions matter.

Good for: residents who want a SoftBank-side sub-brand with store support.

What it is: Y!mobile is SoftBank’s sub-brand. It sits between a full major-carrier experience and a pure online-only low-cost SIM.

Y!mobile plan shape	Why it matters
Small / medium / larger data tiers	Easier to pick if you know your monthly usage
Store support	Useful if online-only application feels stressful
Family and home internet discount logic	Can become attractive for households
LINEMO instead	Better if you do not need stores and care about a simpler online SoftBank-side SIM

Pros: Y!mobile is useful if you want a cheaper SoftBank-side option but still value store support, family discount logic, or home internet bundle logic. If you hear people casually say “Yahoo” in this context, they often mean Y!mobile.

Obvious cons: Foreign-national document requirements still apply. Non-permanent statuses often need Residence Card plus foreign passport.

LINEMO

Service link: LINEMO

Typical pricing: LINEMO’s current plan page lists ¥990/month up to 3GB, ¥2,090/month up to 10GB, and ¥2,970/month for 30GB on Best Plan V. Voice calls outside included allowances are generally billed separately.

Good for: people who use LINE a lot and want a simple online SoftBank-side plan.

What it is: LINEMO is SoftBank’s low-cost online SIM. It is designed for people who are comfortable applying online and do not need store support.

LINEMO plan direction	Best for
Smaller Best Plan-style data use	People who mainly need a simple resident SIM and use WiFi often
Larger Best Plan V-style data use	People who want more data and a simple online plan
LINE usage outside mobile data allowance	Heavy LINE users
Y!mobile instead	People who want SoftBank-side service but still want store support

Pros: LINEMO highlights LINE usage that does not eat into your data, online signup, credit-card payment, and no store visit. That makes it a strong fit if you use LINE heavily and want a simple resident-side plan without walking into a shop. Personally, I have found LINEMO’s signal very stable in Tokyo, Fukuoka, and Nagano city areas when I go snowboarding, though mountain coverage always depends on the exact resort and terrain.

Obvious cons: It is online-only and still expects resident-style identity documents. If you want store support or do not have a Residence Card, it is not the right first move.

IIJmio

Service link: IIJmio eSIM

Typical pricing: IIJmio’s official Gigaplan Q&A lists voice SIM / voice eSIM from ¥850 to ¥3,900/month depending on data size, and data eSIM from ¥440 to ¥3,540/month. Initial fees and SIM/eSIM profile issuance fees are separate.

Good for: residents who care about low monthly cost and flexible eSIM choices.

What it is: IIJmio is a budget MVNO-style option that is useful once you are settled enough to choose based on cost and plan structure rather than newcomer support.

IIJmio option	Best for
Voice eSIM	Residents who want a real phone number and lower monthly cost
Data eSIM	Tablets, secondary phones, backup data, or people who do not need calls/SMS
Gigaplan-style data choices	People who want to pick a smaller or larger data bucket carefully
Mainstream carrier instead	People who want store support or a simpler onboarding experience

Pros: IIJmio explicitly offers both voice eSIM and data eSIM, which makes it useful once you know exactly what you need. If you are comfortable reading the plan page and choosing between voice and data, it can be a strong low-cost resident choice.

Obvious cons: It is more of a normal resident setup than a newcomer support path. If you want English onboarding or passport-based voice service, look elsewhere first.

The Practical Advice I Would Give Most People

If you just need internet for a short stay

Get a data-only eSIM and stop there.

If you are a student and expect daily life in Japan to run through this phone

Get a real number, not only data.

If you are a digital nomad

Do not build your plan around mainstream resident carriers. Start with no-Residence-Card reality.

If you are a new employee with your Residence Card and address already ready

You can often go straight to Rakuten, LINEMO, ahamo, UQ, or IIJmio.

If you have been in Japan for a while already

Check whether you are still paying extra for newcomer convenience that you no longer need.

The Short Version

If you only remember four things, make them these:

Start with your stay type, not with carrier ads.
Data-only is easy; a real Japanese number is the harder decision.
Digital Nomad and tourist cases sit much closer together than student and worker cases.
Once you have a Residence Card and stable address, mainstream carriers become much more realistic.