Docomo to Rakuten Mobile: Regret or Relief? Complete Guide for Foreigners in Japan [2026 Guide]
Thinking about switching from Docomo to Rakuten Mobile — but worried you might regret it? You’re not alone. This is one of the most common questions among foreign residents in Japan who are tired of paying ¥7,000–¥10,000 a month for a plan they barely use to its full potential.
This guide covers everything you need to know: real concerns, honest answers, the actual savings, and how to maximize your switch with the best available campaign points in 2026.
Why Docomo Users in Japan Consider Switching
Docomo is Japan’s largest and most established carrier. Its network coverage is genuinely excellent — especially in rural areas and on older building infrastructure. But for many foreign residents, particularly those living in major cities, paying a premium for that legacy network no longer makes financial sense.
Here’s why the switch conversation keeps coming up:
- Monthly bills can easily exceed ¥6,000–¥9,000, even on mid-tier Docomo plans
- Docomo’s plans are complex — with multiple tiers, option fees, and confusing discounts
- Foreign residents often aren’t eligible for all the family discount bundles that make Docomo’s pricing more competitive for Japanese families
- Rakuten Mobile offers unlimited data for ¥3,278/month (tax included) — a single flat rate, no surprises
The math is straightforward. If you’re currently paying ¥7,000/month on Docomo and switch to Rakuten Mobile at ¥3,278, that’s roughly ¥44,000 saved per year — before even counting the welcome campaign points.
The Honest Concerns: Will You Regret Switching?
Let’s not sugarcoat it. Rakuten Mobile isn’t perfect, and some users do experience frustration after switching. Here are the most common “regrets” — and how serious they actually are.
1. Network Coverage in Rural Areas
This is the most legitimate concern. Rakuten Mobile’s own network (Band 3 and n77) is strongest in urban areas. In rural Japan, it relies on roaming via au’s network, but that roaming agreement has been gradually phasing down as Rakuten expands its own infrastructure.
Verdict: If you live or frequently travel in rural Japan, test Rakuten’s coverage map carefully before switching. If you’re based in Tokyo, Osaka, Nagoya, Fukuoka, or other major cities, coverage is generally solid.
For a different perspective on switching from a carrier with strong rural coverage, the Rakuten Mobile AU to Rakuten Mobile Regret: Honest Complete Guide for Foreigners in Japan [2026 Guide] covers similar concerns from the au side in detail.
2. Customer Support in English
Docomo has a dedicated English support line. Rakuten Mobile’s English support is more limited — primarily handled through chat and the English version of their website. For complex issues (especially for non-Japanese speakers), this can be frustrating.
Verdict: If you’re comfortable navigating the app and website in English, day-to-day use is manageable. But if you anticipate needing frequent telephone support in English, this is worth considering.
3. Calls and Connectivity in Buildings
Some users report weaker in-building signal compared to Docomo. This varies significantly depending on your location and building type.
Verdict: For most people in urban apartments and offices, this is a non-issue. If your current workplace or home has basement levels or thick concrete walls, it’s worth checking Rakuten’s coverage map or borrowing a friend’s SIM to test.
4. iPhones and eSIM Compatibility
Foreign residents often bring unlocked iPhones or other devices from abroad. Rakuten Mobile supports eSIM, and compatibility with unlocked iPhones (including international models) has significantly improved as of 2025–2026.
Verdict: If you have an unlocked iPhone XS or newer, you’re likely fine. Check Rakuten’s official device compatibility list before switching.
What You Actually Get: The Rakuten Mobile Plan in Plain English
Rakuten Mobile has one plan. That simplicity is actually refreshing compared to the complexity of Docomo’s lineup.
- Price: ¥3,278/month (tax included)
- Data: Unlimited (no speed throttling for heavy users in Japan)
- Calls: Unlimited domestic calls via the Rakuten Link app (free), or standard per-minute rates otherwise
- Roaming: Available in multiple countries with a free 2GB monthly allowance
The unlimited domestic calling via Rakuten Link is a feature that many foreign residents genuinely appreciate — especially for calling Japanese government offices, banks, or landlords without worrying about per-minute charges.
The Campaign Points: Why Timing Your Switch Matters
Here’s where switching from Docomo to Rakuten Mobile gets especially interesting in 2026.
Standard MNP Campaign
If you switch via MNP (Mobile Number Portability — keeping your existing phone number), the standard Rakuten Mobile campaign offers 13,000 Rakuten Points.
Employee Referral Campaign: 14,000 Points for MNP
When you use an employee referral link, the MNP reward increases to 14,000 Rakuten Points — that’s 1,000 points more than the standard campaign. For a new signup (without MNP), the referral link gives 11,000 points.
To use the employee referral link for the best point total, you can apply through: 👉 https://r10.to/henTIE
How the Points Are Paid Out
This is important to understand before switching:
- Points are paid in 3 installments
- Payments begin 4 months after the month in which you applied via the referral link
- For example, if you switch in June 2026, your first point installment arrives around October 2026
This is standard for Rakuten’s campaign structure — not unusual — but worth planning for if you were hoping to use the points immediately.
How Much Are 14,000 Rakuten Points Worth?
Rakuten Points can be used across a huge ecosystem: Rakuten Ichiba (online shopping), Rakuten Pay (in-store payments at thousands of merchants in Japan), Rakuten Edy, and more. For most foreign residents already using Rakuten services, 14,000 points is genuinely useful — roughly equivalent to ¥14,000 in spending power across Rakuten’s platform.
For a deeper breakdown of how to maximize your Rakuten ecosystem benefits, including how carrier points connect to cashback and shopping, check out the Rakuten Mobile Switch Campaign & Referral Complete Guide for Foreigners in Japan [2026 Guide].
The Real Savings Calculation: Docomo vs. Rakuten Mobile
Let’s put actual numbers together for a realistic scenario.
| Docomo (eximo, mid-tier estimate) | Rakuten Mobile | |
|---|---|---|
| Monthly cost | ~¥6,000–¥7,000 | ¥3,278 |
| Annual cost | ~¥72,000–¥84,000 | ~¥39,336 |
| Annual savings | — | ~¥32,000–¥45,000 |
| MNP campaign bonus (referral) | — | +¥14,000 in points |
| Effective Year 1 Total | ~¥72,000+ | ~¥25,000 net |
Even being conservative, the first-year financial case for switching is significant.
How to Switch from Docomo to Rakuten Mobile: Step-by-Step
Step 1: Get Your MNP Reservation Number from Docomo
- Call Docomo’s MNP transfer line: 0120-800-000 (Japanese only)
- Or use My Docomo app/website
- The MNP number is valid for 15 days
- There is no cancellation fee for MNP transfers (as of 2024 regulations in Japan)
Step 2: Prepare Your Documents
You’ll need:
- A valid passport (residence card/zairyu card is also required for in-person procedures)
- Your Rakuten account (create one first if you don’t have it)
- A credit card or bank account for billing
- The MNP reservation number from Step 1
Step 3: Apply via the Referral Link
To ensure you receive the 14,000-point MNP bonus, apply through the employee referral link: 👉 https://r10.to/henTIE
You can choose a physical SIM (delivered by mail) or eSIM (activated immediately). eSIM is faster and often the better choice if your device supports it.
Step 4: Activate and Set Up
- Follow the instructions in the My Rakuten Mobile app
- Download the Rakuten Link app for free unlimited domestic calling
- Your Docomo line automatically disconnects when Rakuten activates
Step 5: Confirm Point Campaign Registration
Log into your Rakuten account and confirm the referral campaign is registered. Points will arrive starting 4 months after your switch month.
Who Should (and Shouldn’t) Switch
Good candidates for switching from Docomo to Rakuten Mobile:
- Foreign residents living in Tokyo, Osaka, Kyoto, Nagoya, Yokohama, Fukuoka, Sapporo, and other urban centers
- People paying more than ¥4,500/month on their current plan
- Heavy data users (Rakuten’s unlimited plan is particularly good value)
- Rakuten ecosystem users (points integrate directly with shopping, travel, etc.)
- Those with eSIM-compatible unlocked devices
You might want to wait if:
- You frequently travel to remote rural areas for work or lifestyle
- You need reliable English telephone support for your carrier
- Your building or workplace has documented signal issues with Rakuten
Final Thoughts: Regret or Relief?
The honest answer is: for most foreign residents in urban Japan, switching from Docomo to Rakuten Mobile is a relief, not a regret.
The savings are real. The unlimited data plan genuinely simplifies your mobile life. And the 14,000-point MNP bonus through the referral campaign softens the transition cost considerably.
The concerns — mainly rural coverage and English support limitations — are real but affect a minority of users. If you’ve checked the coverage map and you live in a well-covered area, the switch is almost always financially worthwhile.
If you’re ready to make the move, the employee referral link below gives you the maximum available point bonus (14,000 points for MNP, 11,000 for new signup), with points paid in 3 installments starting 4 months after your switch:
👉 Apply via referral link: https://r10.to/henTIE
Take your time, check coverage in your area, and make the decision that works for your actual lifestyle in Japan. But if the numbers work for you — and for most people in cities, they do — there’s little reason to keep overpaying.