Short answer
No. A Wakamo Japan plan lists no voice calls and cannot dial a restaurant or hotel telephone number, and LINE says its service for calling an ordinary phone number ended on May 31, 2023, while LINE, WhatsApp, and FaceTime reach people on those apps over the internet, except that WhatsApp says carrier and data charges may apply when the number is not currently registered on WhatsApp.
A Japanese phone number on the plan, cellular voice, SMS, and whether LINE, WhatsApp, FaceTime, and iMessage keep a number are covered in Do I get a Japanese phone number with a Japan eSIM?.
Fact table
As of 2026-10-21
Each claim names its source. The full source list, with the date each page was read, is below.
| Claim | Source |
|---|---|
| A Wakamo Japan plan lists no phone number and no voice calls. | Wakamo Japan plan page |
| Apple says you make a phone call on iPhone by dialing the number on the keypad in the Phone app. On models with Dual SIM, you tap the line at the top of the keypad and choose a line. | Apple Support, make a call |
| Apple says Dual SIM can add a local data plan when you travel to another country or region, and can keep separate voice and data plans. You choose the default line for voice calls, and you choose the default line for cellular data separately. | Apple Support, Dual SIM |
| LINE says you can make a 1-on-1 voice or video call with a friend, or a group voice or video call, for free anywhere. A 1-on-1 call starts from that friend. LINE says you are charged for the data used when the call is on a mobile network, and gives 4G and 5G as examples. | LINE Help, voice and video calls |
| LINE says the LINE Out service ended on May 31, 2023, because LINE Plus would no longer operate as a phone service provider in Japan. LINE's alternative is free voice and video calls between LINE friends. | LINE STORE, end of LINE Out |
| WhatsApp's iPhone help says a voice call lets you call your contacts using WhatsApp, uses the phone's internet connection rather than the mobile plan's minutes, and that data charges may apply. If the number is not currently registered on WhatsApp, WhatsApp says to select Call on the pop-up that explains the call will be through the mobile carrier, and that carrier and data charges may apply. | WhatsApp Help, voice call on iPhone |
| WhatsApp's Android help says a voice call lets you call your contacts using WhatsApp, uses the phone's internet connection rather than the mobile plan's minutes, and that data charges may apply. For a number that is not currently registered on WhatsApp, WhatsApp says to select Dial, and that carrier and data charges may apply if the user is not on WhatsApp. | WhatsApp Help, voice call on Android |
| Apple says that with an internet connection you can make and receive calls in the FaceTime app, over Wi-Fi or over cellular data, and that data rates may apply. FaceTime tries to connect using any FaceTime-enabled numbers or addresses stored for that person. Apple says FaceTime, Group FaceTime, or FaceTime audio may not be available in all countries or regions. | Apple Support, use FaceTime |
FAQ
Can I dial a restaurant or hotel telephone number on a Wakamo Japan plan?
No. A Wakamo Japan plan lists no phone number and no voice calls. Apple says that number is dialed in the Phone app, and on Dual SIM you choose the line at the top of the keypad. Apple also says the default voice line is chosen separately from the cellular data line.
Can LINE call a restaurant that only lists a telephone number?
No. LINE says the LINE Out service ended on May 31, 2023. That was LINE's service for calling an ordinary phone number, and LINE's alternative is free voice and video calls between LINE friends. A 1-on-1 LINE call starts from a friend, and a call on a mobile network uses data.
Can I WhatsApp a hotel number that is not on WhatsApp?
WhatsApp says a voice call to a contact uses the phone's internet connection rather than the mobile plan's minutes, and that data charges may apply. On iPhone, if the number is not currently registered on WhatsApp, WhatsApp says the call will be through the mobile carrier. On Android, WhatsApp says to select Dial for that number. Both articles say carrier and data charges may apply. A Wakamo Japan plan lists no voice calls.
Can I FaceTime a hotel's phone number?
Apple says FaceTime calls need an internet connection and can use Wi-Fi or cellular data, and that data rates may apply. FaceTime tries to connect using any FaceTime-enabled numbers or addresses stored for that person. Apple says FaceTime, Group FaceTime, or FaceTime audio may not be available in all countries or regions.
Can the restaurant call me back on a Japanese number from this plan?
No. A Wakamo Japan plan lists no phone number and no voice calls.
Do LINE, WhatsApp, and FaceTime calls use the data connection?
LINE says a voice or video call with a friend is free, and that data used on a mobile network is charged. WhatsApp says a voice call to a contact uses the internet rather than the mobile plan's minutes, and that data charges may apply. Apple says FaceTime works over Wi-Fi or over cellular data, and that data rates may apply.
Sources
Wakamo Japan plan pagewakamo.io
Wakamo product information. No Japan plan lists a phone number or voice calls. The page does not give a number a restaurant or hotel can call, and it does not list voice calls.
Accessed 2026-10-21.
Apple Support, make a callsupport.apple.com
A phone call on iPhone is dialed in the Phone app, from the keypad, a recent call, or a contact. On models with Dual SIM, the line at the top of the keypad is where you choose which line places that call.
Accessed 2026-10-21.
Apple Support, Dual SIMsupport.apple.com
Dual SIM can add a local data plan when you travel, and it can keep separate voice and data plans. The default line for voice calls and the default line for cellular data are chosen separately.
Accessed 2026-10-21.
LINE Help, voice and video callshelp2.line.me
LINE voice and video calls are 1-on-1 with a friend or with a group, and LINE says they are free anywhere. Data used for a call on a mobile network, such as 4G or 5G, is charged. A 1-on-1 call starts from that friend.
Accessed 2026-10-21.
LINE STORE, end of LINE Outstore.line.me
LINE Out ended on May 31, 2023, because LINE Plus would no longer operate as a phone service provider in Japan. LINE's alternative is free voice and video calls between LINE friends.
Accessed 2026-10-21.
WhatsApp Help, voice call on iPhonefaq.whatsapp.com
A WhatsApp voice call to a contact uses the phone's internet connection rather than the mobile plan's minutes. Data charges may apply. If the number is not currently registered on WhatsApp, the article says to select Call on the pop-up that explains the call will be through the mobile carrier, and carrier and data charges may apply.
Accessed 2026-10-21.
WhatsApp Help, voice call on Androidfaq.whatsapp.com
A WhatsApp voice call to a contact uses the phone's internet connection rather than the mobile plan's minutes. Data charges may apply. For a number that is not currently registered on WhatsApp, the article says to select Dial, and carrier and data charges may apply if the user is not on WhatsApp.
Accessed 2026-10-21.
Apple Support, use FaceTimesupport.apple.com
With an internet connection, FaceTime calls are made in the FaceTime app, over Wi-Fi or over cellular data, and data rates may apply. FaceTime tries FaceTime-enabled numbers or addresses stored for that person. FaceTime, Group FaceTime, or FaceTime audio may not be available in all countries or regions.
Accessed 2026-10-21.