Verification Status: This article is based on publicly available information (no actual usage or trading by the editorial team).
"I need to do something about my monthly phone bill." Tanaka Shota, a 32-year-old IT worker in Tokyo, habitually watches videos on his commute and tethers his tablet on weekends. He currently has a 20GB plan with a major carrier, but the monthly bill comes to ¥7,150. With household expenses under review, this fixed cost has become a heavy burden. While switching to a budget SIM has crossed his mind, fears that "it won't work on the subway" or "what if I can't use it when visiting my parents in the countryside" have held him back.
Rakuten Mobile is the right choice for those who use over 20GB of data per month and live or work in urban areas. Its appeal lies in a low-cost unlimited plan, free calls, and low cancellation risk. However, connectivity in underground areas and rural regions can be an issue, so checking coverage in advance is essential.
What is Rakuten Mobile? A Simple Breakdown of the Basic System and Pricing
Image source: corp.mobile.rakuten.co.jp (Official Site) — Cited for identification of the reviewed service
What Tanaka first looked into was the basic system and pricing structure of Rakuten Mobile. After cross-referencing the official site and multiple review platforms, what emerged was a simple yet bold pricing design.
The core of Rakuten Mobile, the "Rakuten Saikyo Plan," uses a system where the monthly fee automatically changes across three tiers based on data usage. This eliminates the need for users to manually switch plans—you simply pay according to how much you use.
| Monthly Data Usage | Monthly Fee (Tax Included) |
|---|---|
| Up to 3GB | ¥1,078 |
| 3GB to 20GB | ¥2,178 |
| Over 20GB (Unlimited) | ¥3,278 |
The meaning of this pricing table is clear. For months with minimal data usage, the fee stays at ¥1,078. Even if you exceed 20GB through video streaming or tethering, the fee caps at ¥3,278. For heavy users like Tanaka who consume over 20GB per month, this means getting "unlimited data" for less than half of their current cost.
Another key highlight is the handling of domestic calls. By using the dedicated "Rakuten Link" app, domestic calls are completely free, 24/7. Whether for work communication or long calls with family, there's no need to worry about call charges. Additionally, there are no contract periods or cancellation fees, and if you choose an eSIM, you can activate it on the same day you apply.
"7,150 yen a month becomes 3,278 yen?" Why Tanaka considered Rakuten Mobile
Facing the pricing table, Tanaka tapped away on his calculator. His current monthly bill of 7,150 yen would drop to 3,278 yen with Rakuten Mobile's unlimited plan. That's a difference of 3,872 yen per month, or 46,464 yen in annual savings. These numbers were a major factor in swaying his decision.
However, he discovered more than just a price cut. Rakuten Mobile also offers unlimited tethering. On weekends, Tanaka is in the habit of connecting his tablet via tethering at home to watch videos. Currently, he has to keep an eye on his smartphone's data cap, but with unlimited data, that stress would disappear. The possibility of using it as a substitute for a home fixed-line connection was also highlighted in multiple review sites.
Another factor that resonated with Tanaka's lifestyle was the integration with the "Rakuten Ecosystem." He already buys daily necessities on Rakuten Ichiba and is a regular user of the Rakuten Card. By signing up for Rakuten Mobile, the point multiplier for Rakuten Ichiba's SPU (Super Points Up Program) increases, allowing him to earn more points on everyday purchases. Lowering communication costs while boosting the overall rewards rate on his spending—this was a value that went beyond the scope of a typical "budget SIM."
"Since I can try it with zero cancellation fees, if it doesn't work out, I can just go back." Tanaka began to think this way. The low risk pushed his research to the next step.
Major Low-Cost SIM Comparison: Is Rakuten Mobile Really the "Best"?
"But is Rakuten Mobile really the right choice?" Tanaka decided to fairly examine other options as well. He compared three popular choices for users consuming around 20GB of data: Nihon Tsushin SIM, ahamo, and Y!mobile. Based on publicly available information, here's a breakdown across key criteria.
| Comparison Item | Rakuten Mobile | Nihon Tsushin SIM | ahamo | Y!mobile |
|---|---|---|---|---|
| Monthly Fee (at 20GB) | 3,278 yen | 1,390 yen | 2,970 yen | — |
| Data Cap | Unlimited | 20GB | 20GB | — |
| Call Charges | Free via Rakuten Link | Separate call charges | 5 min free/call | 10 min free/call |
| Contract Commitment | None | None | None | Yes (depends on plan) |
| Coverage Stability | Improved in cities, issues in basements/rural areas | Stable via Docomo network | Stable via Docomo network | Stable via SoftBank network |
| Tethering | Unlimited | Available | Available | Available |
The picture from this table is clear. If you want to use as much data as possible without worrying about a cap, Rakuten Mobile stands out. On the other hand, if coverage stability is your top priority, Nihon Tsushin SIM or ahamo, which use the Docomo network, have the edge. Y!mobile offers the stability of the SoftBank network and family discounts, but in many cases, its pricing can't match Rakuten Mobile's unlimited plan.
For Tanaka, watching videos during his commute and tethering on weekends easily exceeds 20GB per month. Given his priority of keeping costs low while not worrying about data limits, Rakuten Mobile's advantage was clear. However, the only lingering concern was connectivity in his rural hometown. Still, with zero cancellation fees and the ability to try it risk-free, starting with a free demo or area check is the safest approach.
The Truth Behind the "90.2% Satisfaction" Seen in Reviews, and the "Area" Issue That Needs Improvement
To find out what the service is actually like to use—something a comparison table can't show—Tanaka read through several review sites. According to one survey, which aggregated feedback from 863 users, the satisfaction rate for pricing reached 90.2%. A sentiment analysis also showed that positive opinions accounted for 58.3% and neutral ones 37.3%, meaning the vast majority of feedback was favorable overall.
However, behind these high ratings, some recurring issues also emerged. Analyzing the themes of the reviews reveals that opinions are polarized between "pricing" and "coverage area."
First, what many users praise is, unsurprisingly, the cost performance.
"The best plan for light users. I haven't experienced any noticeable slowdowns even with unlimited data, and I'm quite satisfied." (From multiple review sites)
"I'm so glad I switched to Rakuten Mobile! My monthly phone bill went down to 1/6 of what it was." (From multiple review sites)
"Domestic calls are free with the dedicated app 'Rakuten Link.' This is a huge help for housewives!" (From multiple review sites)
Free calls and the ease of the sign-up process are also factors supporting the positive reviews.
"The activation process was very easy. Everything was completed online." (From multiple review sites)
On the other hand, regarding the "connectivity" issue that Tanaka was most concerned about, there were indeed a certain number of critical voices.
"It's fine when it connects, but there are still some areas with no signal. I think it would be the best if they eliminated those dead zones." (From multiple review sites)
"There are cases where the signal is weak inside buildings and underground." (From multiple review sites)
These comments clearly show that Rakuten Mobile's coverage area is still "a work in progress." While it works fine outdoors in urban areas, it can still be unstable in subways, deep inside buildings, and in some rural regions. However, multiple review sites also note that Rakuten Mobile is continuing to build out its base stations, and the coverage area is expanding.
"Is It True That It Doesn't Connect?" Addressing 5 Common Concerns About Rakuten Mobile
As Tanaka read through the reviews, several specific questions began to surface. Here, we break down the five concerns he had and what the publicly available information reveals.
1. I've heard it doesn't connect. Can it actually be used? It is true that there are places, such as underground or inside buildings, where the connection can be weak. However, coverage has been improving in outdoor and urban areas, and many users rely on it daily. The key is to check in advance whether your daily living area is within the coverage zone. Rakuten Mobile's official website provides a detailed coverage map, allowing you to pinpoint the signal status at your home, workplace, and frequently visited locations.
2. Even if they say "unlimited," isn't there a speed cap? There is no specific speed limit even after exceeding 20GB. However, some reviews report slower speeds during peak congestion times or in crowded areas. This is a common phenomenon not unique to Rakuten Mobile but seen across many telecom providers.
3. Does it work in rural areas? Coverage can be unstable in some rural regions, so extra caution is needed compared to urban areas. If you plan to use it during trips back to your hometown like Tanaka, it's essential to check the official coverage map for the area around your family home beforehand.
4. Are there fees for canceling? Rakuten Mobile has no cancellation fees or minimum contract period. You can cancel anytime for free. However, there have been some reports of changes to cancellation fees as of April 2026. It's best to check the latest terms on the official website before signing up.
5. Is the customer support really that bad? Opinions on customer support are mixed in reviews. While there are positive ratings, some users have expressed dissatisfaction with the service. Rakuten Mobile offers chat and phone support as channels you can rely on when you need help.
The biggest answer Rakuten Mobile offers to these concerns is "low risk." With zero cancellation fees and instant activation via eSIM, the option to "try it out first" becomes a realistic decision. This was the factor that ultimately pushed Tanaka to give it a shot.
How to Apply for and Activate Rakuten Mobile
"Alright, let's give it a try." Tanaka did a final check on how easy the actual process really is. Based on information from the official website and various review sites, the process from application to activation is surprisingly simple.
Step 1: Apply on the Official Website The entire process can be completed online. If you choose an eSIM, you can proceed with activation immediately after applying. For a physical SIM, it will arrive at your home in about 2–3 days.
Step 2: Obtain an MNP Reservation Number (If Switching from Another Carrier) If you're switching from your current carrier, you'll need to get an MNP reservation number. For major carriers, this can usually be done online or by phone, and the number is typically issued on the same day.
Step 3: Insert the SIM Card or Set Up the eSIM For a physical SIM, insert it into your device. For an eSIM, follow the on-screen instructions to activate it. The setup screen may vary depending on your device model, but the on-screen guide is designed to make the process straightforward.
Step 4: Install the Rakuten Link App This app is essential for making free domestic calls. Install it immediately after activation and complete the initial setup. This allows you to make calls without worrying about charges.
Step 5: Start Using Your Service Once you've completed the steps above, you can use your phone as usual. Since the plan fee is automatically determined based on your data usage, there's no need to manually change plans.
According to user reviews, many say "the activation process was very easy," so the barrier to entry is quite low. Tanaka decided to apply for an eSIM over the weekend, get it activated the same day, and test the signal strength around his home and workplace for about a week. With zero cancellation fees and no risk, it's easy to try out with peace of mind.
Ultimately, Rakuten Mobile Is Recommended for These Types of People
As we've followed Tanaka's research and decision-making process, Rakuten Mobile isn't the "best" option for everyone. However, for those who meet certain conditions, it's an incredibly logical choice.
Rakuten Mobile is suitable for:
- Heavy users who consume 20GB or more of data per month
- People who frequently use tethering and want to replace their home Wi-Fi
- Those who travel abroad often for trips or business and need local data connectivity
- Users already active in the "Rakuten Ecosystem," such as frequent Rakuten Market or Rakuten Card users
- People who want to try it out risk-free with no cancellation fees
Rakuten Mobile is not suitable for:
- People living in rural areas who prioritize stable calls and data connectivity
- Those whose daily life revolves around using their phone in subways or inside buildings
- Users who require a carrier email address (~@rakuten.jp) (Rakuten Mobile's email service is now paid)
For someone like Tanaka—who works in an urban area, consumes large amounts of data, and is familiar with the Rakuten ecosystem—Rakuten Mobile is a "no-brainer" option. With zero cancellation fees, no risk, and the convenience of eSIM activation on the same day, this "try it first" peace of mind is arguably Rakuten Mobile's greatest appeal.
※ This article is based on publicly available information as of July 2026. Pricing plans and service details are subject to change without notice. Please check the latest terms on the official website. Coverage areas and compatible devices vary depending on your usage environment, so we recommend checking in advance.
Methodology and Disclosure
Verification Method: This article is based on publicly available information confirmed as of July 22, 2026. Our editorial team has not personally signed up for or used the services discussed. The content is an explanatory guide based on publicly available information (official websites, third-party reviews, and user feedback). Service details, fees, and promotions are subject to change, so please always check the official information before applying.
Publisher Information: The editorial policy and evaluation criteria for this article are described in our Editorial Policy, and the verification procedures are outlined in our Methodology. If you find any errors, please report them via our contact form.
Affiliate Disclosure: This article contains affiliate links. We may receive compensation at no additional cost to you. This compensation does not affect our editorial content.
Frequently Asked Questions
What is the actual monthly cost of Rakuten Mobile? Are there hidden fees?
Monthly fees are tiered by data usage: ¥1,078 for up to 3GB, ¥2,178 for up to 20GB, and ¥3,278 for over 20GB (conditions apply). There are no cancellation fees or contract commitments, and no hidden charges.
Do I incur call charges if I don't use Rakuten Link?
Yes, standard calls without the Rakuten Link app cost ¥22 per 30 seconds. Using the app gives you free domestic calls 24/7, so it's essential for free calling.
Is Rakuten Mobile really unusable in subways and buildings?
There are areas in subways and buildings where connectivity is poor, as noted in user reviews. Coverage is improving in urban centers, but checking the official coverage map beforehand is recommended.
Does the unlimited data plan have any speed throttling?
During congestion, speed throttling may occur, but most user reviews report that it rarely affects daily use. In practice, the slowdown is often not noticeable.
Is switching from another carrier (MNP) difficult?
No, it's simple: get your MNP reservation number and enter it on the Rakuten Mobile application page. With eSIM, activation can be same-day, and there are no cancellation fees, so you can try risk-free.
Does canceling Rakuten Mobile cost anything?
There are no cancellation or penalty fees whatsoever. With no contract term, you can cancel anytime for free. This makes it a low-risk option to try.
In rural areas, where does Rakuten Mobile work reliably?
Rakuten's own network coverage is limited in rural and countryside areas, leading to connectivity issues. For more stable service, carriers using the Docomo network like Japan Communications SIM or ahamo are better options. Always check the official coverage map first.
Are complaints about poor customer support true? What should I do if I have a problem?
User reviews indicate inconsistent support quality. If you encounter issues, you can use official chat or phone support, as well as Rakuten's Q&A forum and user communities for help.
Sources
This article is based on publicly available information as of 2026-07-22.
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