Rakuten Mobile Activation Same Day: Quickest Process for SIM & eSIM — Complete Guide for Foreign Residents in Japan [2026 Guide]

Thinking about switching to Rakuten Mobile but worried about how long it will take? You’re not alone. One of the most common questions from foreign residents in Japan is: “Can I actually start using Rakuten Mobile on the same day I apply?”

The short answer is yes — and with eSIM, it can happen in under 30 minutes.

This guide walks you through the fastest possible activation path, explains the difference between SIM card and eSIM options, and covers everything you need to know about the current referral campaign — including how to earn up to 14,000 Rakuten Points just for switching.

Why Activation Speed Matters for Foreign Residents

If you’re currently on a contract with a major carrier like au, docomo, or SoftBank, you’re probably paying somewhere between ¥6,000 and ¥10,000 per month for a plan that Rakuten Mobile essentially replaces for ¥3,278/month (tax included) — unlimited data, no strings attached.

Every day you delay is money left on the table. That’s why understanding the fastest activation method is genuinely useful, not just a nice-to-know.

There’s also the point campaign to consider: via the employee referral program, you can receive 14,000 points for MNP (carrier switch) or 11,000 points for a brand-new number signup. The standard non-referral MNP campaign only offers 13,000 points, so the referral route gives you an extra 1,000 points for doing nothing differently. More on that below.

eSIM vs Physical SIM: Which is Faster?

Before diving into the step-by-step process, it’s worth understanding the core difference in activation speed.

eSIM (Recommended for Same-Day Activation)

No physical card needed — the SIM is downloaded digitally to your device
After completing the application online, you can receive your QR code within a few hours (sometimes within 30–60 minutes)
Works with most modern iPhones (XS and later) and many Android flagship devices
Activation can be completed entirely on your own, at home, at any time of day

Physical SIM Card

Shipped by Japan Post (typically arrives in 1–3 business days)
Better option if your phone doesn’t support eSIM, or if you prefer a tangible card
Still very fast compared to traditional carrier contracts, but not same-day

Bottom line: If same-day activation is your priority, choose eSIM. If your device doesn’t support it, a physical SIM is still a very smooth process.

What You Need Before You Start

Getting your documents ready in advance is the single biggest time-saver. Here’s what to prepare:

My Number Card (マイナンバーカード) — This is the easiest and fastest for identity verification (eKYC)
Alternatively: Residence card (在留カード) + one additional ID document
MNP Reservation Number (MNP予約番号) — Only needed if you’re switching from another carrier (see below)
Credit card or debit card for payment setup
Compatible device — Check that your phone is SIM-unlocked and supports eSIM if you plan to go that route

Tip for foreigners: Rakuten Mobile accepts foreign nationals as applicants. You’ll need a valid residence card and a Japanese address. The online application is available in Japanese only, so having a translation app handy can be helpful.

Step-by-Step: Fastest Same-Day eSIM Activation

Step 1: Get Your MNP Reservation Number (If Switching Carriers)

If you’re doing an MNP (Mobile Number Portability) transfer — keeping your current phone number while switching to Rakuten Mobile — you’ll need to request a MNP reservation number from your current carrier first.

au: Use the My au app or call customer support (0077-75470)
docomo: Use the My docomo app or dial 151
SoftBank: Use My SoftBank app or dial 0800-100-5533

This number is typically issued instantly online or within a few minutes over the phone. It’s valid for 15 days, so you don’t need to rush, but get it before starting your Rakuten application.

If you’re signing up with a new number (not porting), you can skip this step entirely.

Step 2: Apply via the Employee Referral Link

This is where the campaign bonus comes in.

To qualify for the higher point rewards, you need to apply through a referral URL — not through Rakuten Mobile’s regular homepage. The referral campaign currently offers:

14,000 points for MNP (switching your existing number)
11,000 points for a new number signup

These points are paid in three separate installments, starting from the 4th month after the month in which you logged in with your referral link. So if you apply in June 2026, you’d start receiving points in October 2026.

👉 You can apply using this referral link: https://r10.to/henTIE

Once you click the link and create or log in to your Rakuten account, the referral is recorded. From there, proceed with the standard application flow.

Step 3: Complete the Application Online

The Rakuten Mobile online application takes most people 10–20 minutes if documents are ready. Here’s what you’ll do:

Select your plan (currently only one: ¥3,278/month, unlimited data)
Choose eSIM as your SIM type
Enter your personal information and Japanese address
Upload your ID — use My Number Card for the fastest eKYC (instant digital verification)
Enter your MNP reservation number if applicable
Set up payment information
Review and submit

After submission, Rakuten will process your application. For eSIM with My Number Card verification, this often completes within 30 minutes to a few hours.

Step 4: Receive and Install Your eSIM

Once approved, you’ll receive an email with a QR code for your eSIM.

On iPhone:

Go to Settings → Cellular → Add eSIM
Tap “Use QR Code” and scan the QR from Rakuten
Follow the on-screen prompts to activate
Set the new line as your primary data line

On Android (varies by model):

Go to Settings → Network & Internet → SIMs → Add SIM
Scan the QR code
Activate and set as primary

The whole installation process takes under 5 minutes once you have the QR code.

Step 5: Confirm Activation and Test Your Connection

Once the eSIM is installed:

Make a test call
Send a test message
Open a browser and confirm you’re connected via Rakuten’s network

If you did an MNP transfer, there will be a brief window (usually just a few minutes) where both your old SIM and new eSIM transition — your old carrier line will disconnect first, then Rakuten’s line activates. This transition typically happens the same day, often within minutes of completing setup.

Understanding the Rakuten Point Rewards

Let’s be clear about what to expect with the points.

Application Type	Via Referral	Standard Campaign
MNP (number transfer)	14,000 points	13,000 points
New number signup	11,000 points	Varies

Important details:

Points are distributed in 3 installments (not all at once)
The countdown starts from the month you logged in using the referral link
The first installment arrives 4 months later
You can have up to 5 lines registered per person — meaning a family switching multiple lines can accumulate significant point rewards
Points are Rakuten Points, usable across Rakuten’s wide ecosystem (shopping, travel, etc.)

For anyone curious about how these savings add up over time alongside the monthly plan reduction, the How Much Can You Save Switching to Rakuten Mobile? Monthly Savings Calculator vs Docomo, au & SoftBank [2026 Guide] is worth reading through.

Common Questions from Foreign Residents

“Can I apply with a residence card instead of My Number Card?”

Yes, absolutely. However, verification with a residence card may require additional steps (uploading front and back of the card plus a secondary ID), which can slow down approval by a few hours. For same-day activation, My Number Card remains the fastest option.

“Is my phone compatible with Rakuten Mobile eSIM?”

Most flagship iPhones and Android phones sold in Japan (and many bought overseas) support eSIM. However, phones that are SIM-locked to a specific carrier need to be unlocked first. If you bought your phone from au, docomo, or SoftBank in Japan, contact them to request a SIM unlock before applying — this is usually free and done within minutes online.

“What if the application isn’t approved same day?”

Applications submitted late at night, on weekends, or requiring manual document review may take until the next business day. To maximize your chances of same-day processing, apply on a weekday morning or afternoon with your My Number Card ready.

“Is Rakuten Mobile’s network coverage okay?”

This is a fair concern and one worth researching before committing. For a balanced look at the potential downsides, including coverage considerations for specific regions, check out the Rakuten Mobile au to Rakuten Mobile Regret & Demerit Complete Guide for Foreigners in Japan [2026 Guide].

Physical SIM Option: When It Makes Sense

If your device doesn’t support eSIM, or if you simply prefer having a physical card, the process is nearly identical — just choose “SIM card” instead of “eSIM” during step 3. Your SIM will arrive in 1–3 business days by post.

Upon receiving the card:

Power off your device
Remove your old SIM and insert the Rakuten SIM
Power on and follow the APN setup instructions included in the package
For MNP transfers, call Rakuten’s activation line if the number hasn’t already ported automatically

Final Thoughts

Switching to Rakuten Mobile as a foreign resident in Japan is genuinely straightforward — and with eSIM, it really can happen the same day you decide to make the move.

To recap the fastest path:

Prepare your My Number Card and get your MNP number if needed
Apply through the referral link to secure the maximum point reward
Choose eSIM and complete eKYC with your My Number Card
Install the eSIM via QR code within hours
Start saving ¥3,278/month — and watch for your point installments starting month 4

If you’d like to take advantage of the 14,000-point MNP referral campaign or the 11,000-point new signup bonus, you can get started here:

👉 Apply via referral link → https://r10.to/henTIE

No pressure to use it — but if you’re applying anyway, it takes exactly the same effort and nets you an extra 1,000 points compared to applying without a referral. That’s a straightforward win.