Carrier Comparison

Y!mobile Price Increase 2026 | Comparison with Rakuten Mobile

Published: May 20, 2026 / Updated: May 20, 2026

Mobile Otaku

Thank you for visiting. This blog is run by me — a Rakuten employee (8 years in system development) — as a personal project. Switching mobile carriers can bring many worries: "What if I lose signal after switching?" or "How much will I actually end up paying?" I hope this blog helps you make an informed decision.

Reader: "I heard Y!mobile is raising prices — how much will it go up?"

Mobile Otaku: "From June 2, 2026, Y!mobile's Simple3 plans go up by ¥220/month. Here's a full breakdown of the price increase and why Rakuten Mobile is worth considering as an alternative!"

On June 2, 2026, Y!mobile is implementing a price revision. Many users are wondering whether to stay or switch. Here's a clear comparison of the new prices.

Y!mobile Price Increase Overview [June & July 2026]

Y!mobile is raising prices in two stages.

Simple3 Plan Increase (from June 2, 2026)

Plan	Data	Until June 1	From June 2	Change
Simple3 S	5GB	¥3,058	¥3,278	+¥220
Simple3 M	30GB	¥4,158	¥4,378	+¥220
Simple3 L	35GB	¥5,258	¥5,478	+¥220

※Prices incl. tax, before discounts. Simple3 L includes 10 min/call free calling.
※Existing Simple3 users receive a special discount of -¥220 automatically through December 31, 2026.
Source: Y!mobile price change notice

Price comparison with Rakuten Mobile after the increase:

Rakuten Mobile vs Y!mobile

Full Plan Comparison (After Y!mobile Simple3 Increase on June 2, 2026)

Item	Rakuten Mobile Rakuten SAIKYO Plan Automatic billing by usage	Y!mobile Simple3 (After June 2) Choose from Simple3 S/M/L
Monthly fee	¥1,078/moBest up to 3GB	¥3,278/moAfter ↑ Simple3 S · 5GB
	¥2,178/moBest 3–20GB	¥4,378/moAfter ↑ Simple3 M · 30GB
	¥3,278/moBest Unlimited · Unlimited data^※1	¥5,478/moAfter ↑ Simple3 L · 35GB
Domestic calls	Free with Rakuten Link^※2	¥22/30 sec (Simple3 L: 10 min/call free)
Network	Rakuten network	SoftBank network
Discounts	Family & age discounts	Home discount Fiber set / PayPay Card, etc.
Contract admin fee	Up to 4 lines ¥0^※3	¥4,950 (in-store) ¥3,850 (online)
Cancellation fee	After 1 year of use ¥0^※4	¥0

※1 Excludes call charges etc. Speed may be restricted due to fair use policy or conditions.
※2 When using Rakuten Link. Without app: ¥22/30 sec. Some numbers excluded.
※3 Free for up to 4 lines (cumulative). 5+ lines under same name incur admin fee.
※4 Free for lines used over 1 year. Fee within 1 year: ¥1,078 (incl. tax) for Rakuten SAIKYO Plan.
Prices as of May 18, 2026 (incl. tax, before discounts). Check official sites for latest info.
Source: Rakuten Mobile official · Y!mobile official

Simple Plan Increase (from July 1, 2026)

The Simple S / M / L plans are also scheduled to increase by ¥330/month (incl. tax).

How does the price increase affect existing Y!mobile users?

Current Y!mobile subscribers on Simple3 will have the "Simple3 Special Discount" automatically applied through December 31, 2026.

Special discount for existing users

Discount amount: -¥220/month
Period: June 2, 2026 – December 31, 2026
Action required: None (applied automatically)

This means you can continue at your current price through 2026. However, from January 2027, the ¥220 increase is confirmed. It is wise to start comparing alternatives now.

Thinking about switching?

Open the Rakuten Mobile official page via the referral link. Up to 14,000 points with the referral campaign.

Rakuten Mobile referral campaign — up to 14,000 points

Apply for Rakuten Mobile (Referral Campaign) →

※Conditions apply, such as logging in via the referral campaign URL or starting service use before applying. Points awarded in installments starting four months after the referral login month.

FAQ

Can I keep my number when switching from Y!mobile to Rakuten Mobile?

Yes! Using MNP (Mobile Number Portability), you can keep your current number. The process can be completed in as little as one day.

When does the Y!mobile price increase take effect?

Simple3 S/M/L plans increase from June 2, 2026. Simple S/M/L plans increase from July 1, 2026. Existing Simple3 users receive a special discount of -¥220 automatically through December 31, 2026.

Summary

Y!mobile Simple3 S/M/L plans increase by ¥220/month from June 2, 2026
Existing users keep current pricing through December 31, 2026 (automatic)
At the same ¥3,278/month: Y!mobile gives 5GB — Rakuten Mobile gives unlimited^※1

Apply for Rakuten Mobile (Referral Campaign) →

※1 Excludes call charges etc. Speed may be restricted due to fair use policy or conditions.

Sources: Rakuten Mobile SAIKYO Plan · Y!mobile price change notice

Plans and pricing subject to change. Always check official sites before applying.

Affiliate disclosure: This article contains affiliate links. If you apply through a link, we may earn a commission at no extra cost to you.