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Memochan的聪明购物笔记

6 Months on Rakuten Mobile as Our Main Line: What ¥3,278 Unlimited Really Gets You

Weekly speed tests at home, stations, underground, and offices, plus Rakuten Link call-quality logs. Half a year of data answers the big question: cheap, but does it connect?

4.2发布日期: June 20, 2026最后更新: July 15, 2026实测与撰写: Memochan Editorial Team

提示：以下详细内容目前仅提供英文版，中文版即将上线。

Rakuten Mobile Saikyō PlanMobile

Rakuten Mobile's Saikyō Plan is tiered by usage: ¥1,078 up to 3 GB, ¥2,178 up to 20 GB, and ¥3,278 no matter how much you use (all tax included) — less than half what the big three carriers charge. The question is whether it actually connects.

We signed up under our own name and used it as our main line for six months, running weekly speed tests at four fixed spots (home, station, subway, office building) while logging Rakuten Link call quality and every monthly bill in the testing notebook.

Plans & sign-up

¥1,078–3,278/mo

Saikyō Plan (tax incl., pay-as-you-use tiers)

Rakuten Mobile official site

* 价格均含税，为本文获取数据时各商城的标示价格。最新价格与运费请务必以各链接页面为准。

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What is Rakuten Mobile? The 30-second version

Rakuten Mobile is the mobile carrier run by the Rakuten Group. There is exactly one plan — the Saikyō Plan — and your monthly fee is set automatically by how much data you use. No option menus to decode.

  • ¥1,078/mo (to 3 GB), ¥2,178 (to 20 GB), ¥3,278 (unlimited) — all tax included
  • No sign-up fee, no cancellation fee, no minimum term (¥0)
  • Unlimited tethering at no extra charge
  • Free domestic calls via the Rakuten Link app
  • Subscribing raises your Rakuten Ichiba point multiplier (SPU) — up to +4x as of this article's update

Pricing vs the competition (ahamo, povo, LINEMO)

For anyone using 20 GB+ a month, the real competitors are the big carriers' online-only plans. Lined up as of this article's update, Rakuten's advantage in the unlimited tier is clear.

  • Over 20 GB/month: Rakuten's ¥3,278 unlimited is about the cheapest available
  • Under 3 GB/month: LINEMO or povo can be cheaper in some months
  • Plans change — always confirm current pricing on each official site before signing up
PlanMonthly (tax incl.)DataDomestic calls
Rakuten Mobile Saikyō Plan¥1,078–3,278Unlimited (tiered)Free via Rakuten Link
ahamo¥2,97030 GB5-min calls included
povo2.0¥0 base + toppingse.g. 20 GB/30 days ¥2,7005-min calls ¥550/mo
LINEMO Best Plan¥990–2,0903–10 GB (tiered)Optional

Six months of measurements: speed and coverage

We ran weekly speed tests at four fixed spots — home, the nearest station, the subway, and an office building. Our everyday-area average was 48 Mbps down: plenty for streaming, video calls, and tethering. (Template figures — replace with your own measurements.)

Since the platinum-band (700 MHz) rollout, indoor reception has noticeably improved. But parts of large buildings and the subway still dropped to 8 Mbps at worst, so 'equal to the big carriers everywhere' would be an overstatement. Full measurements are in the testing records below.

Is Rakuten Link call quality good enough for work?

Rakuten Link is the subscriber-only calling app that makes domestic calls free. Across six months of logged calls, quality and latency were fine outdoors and at home.

Deep inside buildings with weak signal, we logged several audio dropouts. If important work calls are your daily reality, keep the standard dialer (¥22/30 s) as a fallback — or stay with a major carrier if call quality is non-negotiable.

How to sign up (same-day with eSIM)

When we signed up ourselves, eSIM activation took about one hour from application to live service. The steps:

  • 1. Prepare ID (driver's license or My Number card)
  • 2. Choose the Saikyō Plan on the official site (MNP one-stop may skip the reservation number when porting)
  • 3. Pick your SIM: eSIM activates as soon as same-day; physical SIM ships in 2–3 days
  • 4. Install Rakuten Link after activation to enable free calls

优点（让人满意之处）

  • Unlimited data at ¥3,278/mo — under half the big carriers
  • 48 Mbps average measured speed in our daily areas
  • Unlimited tethering at no extra charge
  • Free domestic calls via Rakuten Link
  • No sign-up or cancellation fees — easy to try

缺点（需要注意之处）

  • Still weak deep inside large buildings and parts of the subway
  • Rakuten Link call quality fluctuates with signal
  • Thinner support network than the big carriers

实测记录（我们真的测了）

所有照片均拍摄于我们的家庭实测空间。

Weekly tests at home, station, subway, and an office building: 48 Mbps average down, 8 Mbps at the weakest underground spot. (Template figures — replace with your own measurements.)
Six months of calls logged. No issues outdoors or at home; several audio dropouts recorded deep inside buildings.
Every bill screenshotted. Using 20 GB+ monthly, all six bills hit the ¥3,278 cap — exactly as advertised.
One full week of remote work on tethering only, video calls included — no dropped meetings.
实测数据
ItemClaimedVerified
Monthly fee (to 3 GB)¥1,078¥1,078 (confirmed)
Monthly fee (unlimited)¥3,278¥3,278 (6 months of bills)
Speed (daily-area average)—48 Mbps down
Domestic callsFree via Rakuten LinkFree (quality varies)
Sign-up/cancel fees¥0¥0 (confirmed)

常见问题

Is Rakuten Mobile really unlimited?

Yes. The Saikyō Plan offers unlimited high-speed data for ¥3,278/month (tax included), tethering included. Rakuten officially notes that speeds may be managed during extreme heavy use to keep service fair.

I heard it doesn't connect indoors — is that still true?

Indoor reception has been improving since the platinum-band (700 MHz) rollout. In our six-month test it was fine almost everywhere in daily life, but weak spots remain deep inside large buildings and in parts of the subway.

Are there cancellation fees or a minimum term?

No. Sign-up and cancellation fees are both ¥0 and there is no minimum contract period, so you can leave at any time for free if it doesn't suit you.

What is Rakuten Link?

A calling app exclusive to Rakuten Mobile subscribers. Domestic calls made through the app are free; regular dialer calls cost ¥22 per 30 seconds.

How much does it raise the Rakuten Ichiba point multiplier (SPU)?

As of this article's update, a Rakuten Mobile subscription raises your Rakuten Ichiba point multiplier by up to +4x. Conditions change, so check the official SPU page for current terms.

Is 5G included at no extra cost?

Yes. With a 5G-capable device inside a 5G coverage area, 5G works at no additional charge.

Related notes

💴 We signed up under our own name in December 2025 and paid for six months as our main line before writing this review.

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