他社に乗り換えたいのでMNP予約番号をください
たしゃにのりかえたいのでMNPよやくばんごうをください
I'd like to switch carriers. Please issue an MNP reservation number.
POINTMNP=number carrying, industry terminology
Telecom/IT
SIM & MNP Porting
Master the Japanese you need for SIM & MNP Porting in natural keigo. Scene-by-scene flow · NG examples · politeness levels · 9-language parallel translations
This page helps foreign residents and long-term visitors handle "SIM & MNP Porting" with daily Japanese phrases for living in Japan, practical examples, and common mistakes to avoid.
What this page helps you say in Japan
This page focuses on SIM & MNP Porting and teaches useful Japanese phrases for daily life in Japan, including natural replies, polite alternatives, and practical wording for foreigners living in Japan.
What You'll Learn on This Page
- Obtaining MNP reservation number
- Procedures at transfer destination
- Request for SIM unlock
- Switching to eSIM
- Confirmation of cancellation of old carrier
Practice Phrases (10 Total)
予約番号の有効期限を教えてください
よやくばんごうのゆうこうきげんをおしえてください
Could you tell me the validity period of the reservation number?
POINTUsually valid for 15 days
乗り換え手数料はいくらかかりますか
のりかえてすうりょうはいくらかかりますか
What's the switching fee?
POINTIt will become free of charge from 2021 onwards.
電話番号はそのままで使いたいです
でんわばんごうはそのままでつかいたいです
I want to keep my phone number.
POINTClarify the purpose of MNP
SIMロックを解除してほしいのですが
SIMロックをかいじょしてほしいのですが
I'd like to unlock the SIM.
POINTSIM-free in principle from August 2021 onwards
eSIMへの切り替えは可能ですか
eSIMへのきりかえはかのうですか
Can I switch to eSIM?
POINTCompatible with latest models only
開通はいつになりますか
かいつうはいつになりますか
When will it be activated?
POINTUsually same day to next day
旧キャリアの解約は自動的に行われますか
きゅうキャリアのかいやくはじどうてきにおこなわれますか
Is the previous carrier automatically canceled?
POINTOld contract ends upon completion of MNP
最終月の料金はどうなりますか
さいしゅうげつのりょうきんはどうなりますか
How will the final month's billing work?
POINTCheck the rules for daily or full amount
メールアドレスを引き継ぐことはできますか
メールアドレスをひきつぐことはできますか
Can I keep my email address?
POINTMajor carriers can be inherited for a fee
Want to practice these phrases out loud?
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Practice with ECHO App →Frequently Asked Questions
Q. How do I get the MNP reservation number?
A. Can be obtained online, by phone, or in stores. The web is the fastest (available 24 hours a day). You can apply from each carrier's My○○ app.
Q. Will my number change when I transfer?
A. There is no difference if you use MNP. However, if you sign a new contract without using MNP, you will receive a new number.
Q. Is SIM unlocking necessary?
A. Required if the same model is used by another company. Models released after August 2021 are SIM-free from the beginning.
Q. What are the benefits of eSIM?
A. No physical card required, same-day activation, convenient when traveling overseas. However, this is limited to compatible models (iPhone XS and later, etc.).
Q. When is the best time to switch?
A. If you complete the procedure near the end of the month, your old carrier's daily pro-rata rate will be applied, which will save you money. Also be sure to check out cashback campaigns.