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Quick Answer: Rakuten Mobile offers Japan's only true unlimited data plan at ¥3,278/month, with free domestic calls via the Rakuten Link app and no contract period. It is a strong choice for data-heavy users in urban areas. However, indoor coverage can still be inconsistent in some locations, and the network is less mature than docomo/au/SoftBank.
Plan Overview: Rakuten UN-LIMIT
Rakuten uses a simple tiered pricing structure — one plan, price adjusts automatically based on monthly usage:
| Data Usage | Monthly Price | Notes |
|---|---|---|
| 0 – 3GB | ¥1,078 | Cheapest tier, auto-adjusts |
| 3 – 20GB | ¥2,178 | Competitive with sub-brands |
| 20GB – Unlimited | ¥3,278 | No throttling, true unlimited |
What We Like
- True unlimited data — No speed throttling after hitting a cap. The only carrier in Japan offering this at under ¥3,500/month.
- Rakuten Link app — Free domestic calls and SMS through the app (uses data, not voice minutes). This can save significant money on call charges.
- No contract period — Cancel or switch any time with no fees.
- English app and support — The my Rakuten Mobile app is available in English, and Rakuten offers English customer support by chat.
- Rakuten Points ecosystem — Earn and spend Rakuten Points on your phone bill, at Rakuten Ichiba (online shopping), and partner stores.
- eSIM support — Quick activation without waiting for a physical SIM card.
What Needs Improvement
- Indoor coverage gaps — Rakuten's network uses higher frequencies, which penetrate buildings less effectively. In some areas, especially older concrete buildings, signal strength can be weak.
- Partner network (au roaming) being phased out — Rakuten has been reducing its reliance on au's network for roaming coverage. In areas where Rakuten's own towers are sparse, this transition may temporarily affect connectivity.
- Network maturity — Rakuten launched in 2020, so its network is newer and less tested than the three established carriers. Speed consistency can vary more.
- Rakuten Link call quality — Since calls go over data rather than VoLTE, audio quality can be inconsistent depending on your data connection.
Foreign Resident Experience
Sign-up process: Online application is available in English. You'll need a Residence Card and a Japanese credit card, debit card, or bank account. eKYC identity verification (selfie + ID photo) is supported for fast processing.
English support: Chat support is available in English. Phone support is primarily in Japanese, though English operators may be available during some hours.
Required documents: Residence Card (front and back), Japanese payment method (credit/debit card or bank account).
Who Should Consider Rakuten Mobile
- Users who consume large amounts of mobile data (streaming, tethering)
- People who primarily live and work in urban areas
- Users who want a simple plan that adapts to their usage
- Those already in the Rakuten ecosystem (Rakuten Card, Rakuten Ichiba)
Who Might Want to Look Elsewhere
- People living in rural areas or frequently traveling to the countryside
- Users who need consistently strong indoor reception
- Those who prefer in-store support for troubleshooting
Q: Is Rakuten Link really free for all domestic calls?
Yes, calls made through the Rakuten Link app to Japanese mobile and landline numbers are generally free. Calls to some toll-free numbers and special numbers may not go through Rakuten Link. Standard phone app calls (not via Rakuten Link) are charged at ¥22/30 seconds.
Q: Can I sign up for Rakuten Mobile at a physical store?
Yes, Rakuten has physical stores (Rakuten Mobile Shops) in major shopping areas, though the number is smaller than docomo/au/SoftBank. Staff at physical stores may have limited English ability. Online sign-up in English is generally smoother.
Q: Does Rakuten Mobile work for tethering/hotspot?
Yes. Tethering is included at no extra charge. Since the plan is truly unlimited, you can tether without worrying about data caps. This makes Rakuten a popular choice for people who also use it as home internet.
Disclaimer: Pricing and plan details are based on publicly available information as of early 2026. Plans may change without notice. Coverage experience varies by location. Please confirm current details on Rakuten Mobile's official website.
