One of the first questions many foreign residents in Japan ask is: "Can my family back home call me on my Japanese number — and how much will it cost?" Navigating incoming international calls on a Japan mobile plan can feel confusing, especially with a language barrier and unfamiliar carriers. This guide breaks it all down in plain English, covering how incoming calls work, how to set up voicemail, and practical tips to keep costs manageable for you and the people calling you.
How Incoming International Calls Work on a Japanese Mobile Plan
The good news first: if you have a Japanese mobile number — whether from a major carrier like docomo, au, or SoftBank, or from a foreigner-friendly MVNO like GTN Mobile or Mobal — you can receive international calls on it. Your family or friends abroad simply dial Japan's country code (+81), drop the leading zero from your Japanese number, and call the rest of the digits as normal.
For example, if your Japanese number is 090-1234-5678, people abroad should dial +81-90-1234-5678.
That part is straightforward. Where it gets more complicated is the cost — and who pays what.
Who Pays for Incoming International Calls? Costs to Be Aware Of
In Japan, receiving a call on your mobile is generally free for you — you are not charged just for picking up. However, there are two important cost considerations:
- The caller pays international rates: The person calling you from abroad will be charged international call rates by their own carrier or service. These rates vary widely depending on their country and plan. Remind your family to check their carrier's international calling rates before calling.
- Data-only SIMs cannot receive voice calls: If you chose a data-only SIM (common with cheap prepaid SIMs and some MVNOs), you have no phone number and cannot receive standard calls at all. Make sure your plan includes a voice line if receiving calls matters to you.
- Call forwarding may incur charges: If you set up call forwarding to redirect calls to another number, you may be charged for the forwarded portion. Check your carrier's specific policy — more on this below.
These are general guidelines. Fees and plan details change, so always confirm the latest on your carrier's official website.
Setting Up Voicemail on Your Japanese Mobile Plan
Voicemail (called dengon dial or message service in Japan) is useful when you miss a call, especially from family in a very different time zone. Setup varies by carrier, but here is a general overview:
Major Carriers (docomo, au, SoftBank)
All three major carriers offer a voicemail or message service, but it is often not activated by default and may require a separate monthly fee. You typically need to request it through the carrier's app, website, or a store visit. Because navigating Japanese-language menus can be tricky, consider asking a Japanese-speaking friend for help, or use the carrier's in-store English support if available.
Foreigner-Friendly MVNOs (GTN Mobile, Mobal)
Carriers like GTN Mobile and Mobal are specifically designed for foreign residents and offer multilingual support, which makes dealing with service questions — including voicemail setup — much easier. If voicemail is a priority, check whether your MVNO plan includes it and how to activate it. Confirm the latest details on the official site of whichever provider you use.
General Steps to Set Up Voicemail
- Log in to your carrier's app or website (some have English interfaces).
- Look for "voicemail," "message service," or 留守番電話 (rusuban denwa) in the settings.
- Follow the prompts to activate and record a greeting, or use the default automated greeting.
- Note any monthly fee — voicemail is sometimes a paid add-on.
- Test it by having someone call you and letting it ring through.
Using Call Forwarding to Manage International Calls
Call forwarding lets you redirect incoming calls to another number — for example, to a VoIP number or a second phone. This can be useful but comes with caveats:
- Forwarding a call internationally usually means you pay the cost of the forwarded leg of the call, in addition to any international rates the original caller pays. This can add up quickly.
- Forwarding to a domestic Japanese number is generally cheaper than forwarding abroad.
- Check your specific carrier's call forwarding policy and fees — this is an area where charges vary significantly and change over time.
For most foreign residents, call forwarding is not the most cost-effective solution for international calls. Read on for better alternatives.
Cost-Saving Tips: Better Ways to Stay in Touch Internationally
If cost is a concern — and it usually is — here are practical alternatives to standard international calling:
Use Internet-Based Calling Apps
This is the most popular and affordable option. Apps like WhatsApp, LINE, FaceTime, Viber, or Messenger allow free voice and video calls over Wi-Fi or your mobile data. Encourage your family abroad to install the same app. As long as both sides have an internet connection, calls are free or very low cost.
Choose a Plan with Enough Data
To use internet calling reliably, make sure your Japanese mobile plan includes a sufficient data allowance. When comparing plans, look at monthly data limits, throttling policies after you hit your cap, and whether the plan includes voice calling. Foreigner-friendly options like GTN Mobile accept a residence card and offer flexible plans without requiring a Japanese credit card — a common barrier with the big three carriers.
Advise Your Family on Cheaper Calling Options
If your family prefers to call your Japanese number directly (rather than use an app), suggest they use an international calling service or app on their end — many countries have low-cost options for calling Japan. Even small research on their end can significantly reduce their phone bill.
Consider a VoIP or Second Number
Some residents use a VoIP service to get a local number in their home country, which their family can call at local rates. Calls then come through to an app on their phone. This is a more advanced setup but worth exploring if calls are frequent.
Choosing the Right Plan as a Foreign Resident
When selecting a Japan mobile plan, keep these factors in mind — especially if receiving international calls matters to you:
| Factor | What to Check |
|---|---|
| Voice line included? | Essential for receiving calls. Data-only SIMs cannot. |
| Voicemail available? | Check if it is included or costs extra. |
| Japanese credit card required? | Big three carriers often require one. GTN Mobile and Mobal do not. |
| Language support | English support available at GTN Mobile and Mobal. |
| Data allowance | Enough data for app-based calls with family? |
| Contract flexibility | Check cancellation terms before signing. |
Plans and prices change regularly. Always confirm the latest details on each provider's official website before signing up.
Summary: Staying Connected With Family Abroad, Without the Stress
Receiving international calls on your Japan mobile plan is entirely possible, and for most residents the experience is simple once you understand how it works. Your Japanese number is reachable from abroad using Japan's country code (+81). Receiving calls is generally free for you, though the caller pays international rates on their end. Voicemail is a useful add-on but may need to be activated separately. For regular communication, internet-based calling apps are by far the most cost-effective solution for both you and your family.
If you are still choosing a plan, look for one that suits your situation as a foreign resident — voice line included, reasonable data allowance, and ideally multilingual support. Options like GTN Mobile and Mobal are worth comparing if you do not yet have a Japanese credit card or bank account. Take it one step at a time, and do not hesitate to reach out to your carrier's support team if anything is unclear. You have got this.