When you look up Rakuten Mobile’s price, the amounts are all over the place.
One person says “3,278 yen,” another says “2,980 yen,” and yet another says “3,168 yen.”
You end up asking, “So how much is it?” Right. You do.
This article is a summary of what I was able to confirm as of October 7, 2026.
Conclusion: three main reasons the prices look different
- Tax-included and tax-excluded amounts are mixed together
- Amounts with the family discount applied and amounts with no discount are mixed together
- The plan has three tiers (up to 3GB / up to 20GB / over 20GB)
Even for the same contract, the number changes depending on which basis you use.
Amounts written on the official page
On Rakuten Mobile’s official Rakuten Saikyo Plan (Rakuten最強プラン) page, the amounts with the “Saikyo Family Discount (最強家族割)” applied are written as follows.
| Data usage | Monthly (tax excluded) | Monthly (tax included) |
|---|---|---|
| Up to 3GB | 880 yen | 968 yen |
| Over 3GB to 20GB | 1,880 yen | 2,068 yen |
| Over 20GB (unlimited) | 2,880 yen | 3,168 yen |
- It says “110 yen off for any family member”
- The price changes according to how much you use. If you use less, it’s cheaper
- Rakuten Saikyo U-NEXT (Rakuten最強U-NEXT) is written as unlimited at 3,980 yen per month (4,378 yen tax included)
- For unlimited, it says that speed control may apply for fair service provision, for example during congestion
What about the no-discount amount?
This is the biggest reason the amounts look all over the place.
In the body text of the official page I checked, the regular amount without discounts was not written.
On the other hand, news and social media show amounts like these.
- 3,278 yen (tax included) for over 20GB: the Keitai Watch column (October 7, 2026) includes the statement that Rakuten Mobile is “3,278 yen for over 20GB (unlimited)”
- Amounts differ from post to post, such as 2,980 yen and 2,880 yen tax-excluded, or 1,078 yen tax-included
The numbers add up when you calculate
From here on, this is my own reading.
- Subtract the family discount of 110 yen from 3,278 yen (tax included) and you get 3,168 yen. This matches the tax-included amount with the family discount applied on the official page
- Multiply the tax-excluded 2,980 yen by 10% tax and you get 3,278 yen tax included. 2,880 yen is 3,168 yen tax included
- For up to 3GB too, 1,078 yen (tax included) minus 110 yen gives 968 yen, which matches the official amount
So it appears that the no-discount tax-included price is 3,278 yen, with the family discount it is 3,168 yen, and shown tax-excluded they are 2,980 yen and 2,880 yen.
However, I have not been able to confirm the no-discount amount directly on the official page. Please check the latest amounts on the official pricing page.
Why the amounts in posts are all over the place (summary)
| Common figure | Likely meaning |
|---|---|
| 3,278 yen | Over 20GB, no discount, tax included |
| 3,168 yen | Over 20GB, family discount applied, tax included |
| 2,980 yen | Over 20GB, no discount, tax excluded |
| 2,880 yen | Over 20GB, family discount applied, tax excluded |
The “likely meaning” column in the table is my own reading based on the calculation above.
Checkpoints when looking at an amount
- Tax included or tax excluded: in ads and on social media, tax-excluded prices can stand out
- The discount premise: is it an amount with a discount such as the family discount applied?
- The plan tier: up to 3GB, up to 20GB, or over 20GB
- How recent the information is: prices change, so look at the date of the article or post
- Whether it’s an official page: in the end, confirm on the official pricing page
When comparing with other carriers, it’s important to line up the premises. The comparison with ahamo and others is covered in another article of ours (the ahamo price increase versus UQ, Y!mobile and Rakuten).
The plan structure is also explained in our article on how Rakuten Mobile’s cheap plan is structured.
Summary
- The reasons the amounts look all over the place are three: tax-included vs tax-excluded, whether the family discount applies, and the three-tier plan
- The official page lists the amounts with the Saikyo Family Discount applied (968 yen / 2,068 yen / 3,168 yen tax included)
- The no-discount amount was not written in the body text of the official page I checked. The calculation matches the reported 3,278 yen (tax included), so the no-discount price is likely 3,278 yen (my own reading)
- Prices change. Check the official pricing page before applying
When the numbers look different, suspecting “tax included or tax excluded” and “with or without a discount” usually explains it.
Sources: Rakuten Mobile official site, Keitai Watch
- Rakuten Saikyo Plan (in Japanese)
- Is docomo’s “ahamo” really a loss after the price increase? Price comparison with UQ, Y!mobile and Rakuten reveals “surprisingly low prices” (October 7, 2026) (in Japanese)
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This article contains machine translation. For official terms, please refer to the multilingual pages on the official Rakuten Mobile website.
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