Unveiling Mobile Carrier Trends in Japan! What’s Changed From Then to Now? And Which Carrier Should You Choose Today? 🇯🇵📱

For those living in Japan, choosing a mobile carrier is a crucial decision that directly impacts our lifestyles and household budgets. However, since around 2015, when smartphones became widespread, up to the present (2026), the mobile carrier landscape has undergone dramatic changes.

First, based on data from the past decade researched by AI, let’s take a look at the trends in mobile carrier selection and why Rakuten Mobile is attracting so much attention in 2026, in an easy-to-understand comparison format!

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Evolution of Mobile Carrier Selection Trends and Rakuten Mobile’s Current Position (Latest in 2026)

【～2019: Smartphone Penetration & Rise of MVNOs】

• Main Trends: Shift from prioritizing “devices” and “brand power” to “price” and “diversity.”
• Key Focus: Latest smartphones, communication quality, in-store support, affordable monthly fees, balance of data capacity and price.
• Rakuten Mobile’s Status: Provided affordable services as an MVNO (Mobile Virtual Network Operator). Was preparing for full-scale entry as an MNO (Mobile Network Operator).

【2020～2024: Rakuten Mobile’s Full-Scale Entry Period】

• Main Trends: “Price disruption” and the advent of “unlimited data.” Intense competition among major MNOs.
• Key Focus: Overwhelming affordability, unlimited data, online-only plans from major carriers.
• Rakuten Mobile’s Status: Entered the market as an MNO and led the price competition! Caused a significant stir in the mobile industry with “1-year free” campaigns, “tiered pricing plans,” and the “Saikyo Plan.”

【2025～Present: Rakuten Mobile’s “Unlimited Affordability” + Comprehensive Satisfaction Focus】

• Main Trends: Prioritizing “unlimited affordability” while also focusing on “comprehensive satisfaction” (communication quality, convenience, economic ecosystem integration, multilingual support).
• Key Focus: Overwhelming cost-performance for unlimited data, communication quality & stability, eSIM/overseas roaming, economic ecosystem integration, multilingual support.
• Rakuten Mobile’s 【Most Noteworthy Strengths Today!】
  • ✅ Unlimited data for just ¥3,278 (tax included), offering overwhelming affordability!
  • ✅ Strong integration with the Rakuten Ecosystem, where Rakuten Points accumulate rapidly!
  • ✅ eSIM compatible for easy contracts, and free overseas data roaming included!
  • ✅ Multilingual support for peace of mind for foreign residents!
  • ✅ 5G area is expanding, and communication quality is stable!

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As this comparison shows, the criteria for choosing a carrier have evolved with the times, and in 2026, Rakuten Mobile could be the “strongest choice” to meet your needs in many aspects.

Now, based on data from the past decade researched by AI, let’s delve into how mobile carrier selection trends have shifted in three phases! And discover which carrier you should truly choose wisely in 2026.

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Chapter 1: ～2019 – From “Devices” & “Brand Power” to “Price” & “Diversity”

This period was a transitional phase where smartphones became fully established in daily life in Japan, and at the same time, the high cost of mobile phone charges began to be recognized as a social issue.

Main Trends and Key Focus:

• Smartphone Penetration and Device Selection: The latest iPhones and high-performance Android smartphones became mainstream, and the availability of desired devices from carriers remained a significant factor.
• Major Carrier Brand Power and Stability: The three major carriers—Docomo, au, and SoftBank—held strong foundations, and stable communication quality across the country, along with comprehensive in-store support, provided users with a sense of security.
• Rise of MVNOs and “Price” Awareness: From 2015 onwards, MVNOs (low-cost SIMs) began to spread widely, and many users realized they could use mobile services for less than half the traditional price. Services like “LINE Mobile,” “UQ Mobile,” and “Y!mobile” gained popularity, bringing the need to reduce communication costs to the forefront.
• Key Focus:
  • Availability of desired latest smartphone models
  • Communication quality and area stability
  • Completeness of in-store support
  • Affordability of monthly fees (especially after the advent of MVNOs)
  • Balance of data capacity and price

During this time, while the dominance of major carriers was still strong, a new selection criterion of “affordability” emerged. Users began considering not only “devices” and “brands” but also “price” when choosing a carrier. Rakuten Mobile, as an MVNO, was offering affordable rates and steadily preparing for its full-scale entry as an MNO.

Chapter 2: 2020～2024 – Rakuten Mobile’s Full-Scale Entry! The Era of “Price Disruption” and “Unlimited Data”

This period was a tumultuous five years in which the Japanese mobile carrier market dramatically changed due to Rakuten Mobile’s full-scale entry as an MNO (a carrier with its own network). Coupled with government requests for lower prices, an unprecedented fierce price war unfolded.

Main Trends and Key Focus:

• Rakuten Mobile’s “Price Disruption” and “Unlimited Data”:
  Rakuten Mobile, which launched its full-scale service in April 2020, introduced groundbreaking services one after another, such as a “1-year free” campaign, a “tiered pricing plan” where users pay only for what they use, and the “Rakuten Saikyo Plan” offering unlimited data for ¥3,278 (tax included). This overturned the conventional wisdom that “mobile charges are expensive,” and “unlimited affordability” became a new trend, allowing users to communicate without worrying about data usage.
• Major Carriers’ Online-Only Plans: In response to Rakuten Mobile’s aggressive pricing, online-exclusive affordable plans like Docomo’s “ahamo,” au’s “povo,” and SoftBank’s “LINEMO” appeared one after another. Monthly rates around ¥2,000 for 20GB became the new standard.
• Full-Scale 5G Service: Commercial 5G services began, raising expectations for high-speed, high-capacity communication, though initial coverage was limited.
• Beginning of eSIM Adoption: eSIM, which allows contract activation without a physical SIM card, gradually gained recognition, and the use of dual SIMs began in some segments.
• Key Focus:
  • Overwhelming affordability of monthly fees: Especially Rakuten Mobile’s unlimited data pricing was revolutionary.
  • Flexibility of data capacity: Interest in tiered and unlimited plans grew.
  • Simplicity of online procedures: Digitalization of procedures advanced with the advent of online-only plans.

During this period, Rakuten Mobile created a significant breakthrough in the market, and users increasingly sought mobile carriers that offered “affordable and flexible” services.

Chapter 3: 2025～Present (Latest in 2026) – Rakuten Mobile’s “Unlimited Affordability” & Comprehensive Satisfaction Era

After the price competition settled and various carrier plans became established from 2025 onwards, the trend in carrier selection entered a new phase. Beyond mere “affordability,” users increasingly prioritize “unlimited affordability” as a baseline, combined with a comprehensive view of satisfaction. This includes communication quality, convenience, integration with daily life, and more, as the market enters a stable period focused on overall user experience.

Main Trends and Key Focus:

• Rakuten Mobile’s “Unlimited Affordability” with the “Saikyo Plan” Becomes the Standard:
  Rakuten Mobile’s “Rakuten Saikyo Plan,” offering unlimited data for ¥3,278 (tax included) without worrying about data limits, has become the established benchmark for “unlimited affordability” for heavy users. The ability to use as much data as desired at this price point is its biggest appeal.
• Widespread Adoption of eSIM and Dual SIM Usage: eSIM usage is now common, and the use of “dual SIMs” to manage multiple lines on a single device has advanced. This offers increased convenience for overseas travel and serves as a backup in case of main line outages. Rakuten Mobile makes eSIM adoption easy, and includes up to 2GB of free overseas data roaming.
• Leveraging Carrier-Specific Service Integration & Economic Ecosystems: Integration with each carrier’s unique economic ecosystem (Rakuten Points, d Points, Ponta Points, etc.) has become a crucial factor in carrier selection. Especially Rakuten Mobile offers significant benefits for users who regularly utilize the Rakuten Ecosystem, such as increased Rakuten Point還元率 (SPU) on Rakuten Ichiba. Overall “value for money” is heavily influenced not only by communication fees but also by point rewards and discounts in daily life.
• Enhanced Multilingual Support: For foreign residents in Japan, the availability of multilingual support—from contract procedures to daily inquiries—is a decisive factor in choosing a carrier. Rakuten Mobile offers comprehensive multilingual support, ensuring peace of mind for foreign customers.
• Key Focus:
  • Overwhelming cost-performance for unlimited data: Especially Rakuten Mobile’s “Saikyo Plan” perfectly matches this need.
  • Communication quality and stability: Particularly speed, latency, and area coverage in 5G environments.
  • eSIM compatibility and convenience: Ease of managing multiple lines and overseas use.
  • Comprehensive cost-performance: Total “value for money” including point rewards and bundled discounts, not just monthly fees.
  • Multilingual support system: Availability of reliable support.

Conclusion: Latest in 2026! Choose the Best Carrier for Your “Now”!

Choosing a mobile carrier is no longer just about “device appeal” or “affordability” alone.

From the smartphone penetration era around 2015, through the price disruption caused by Rakuten Mobile’s full-scale entry from 2020, the latest in 2026 sees “overwhelming affordability for unlimited data” as a foundational value. Beyond that, “communication stability,” “convenience,” “economic ecosystem integration,” and “multilingual support” are increasingly emphasized as more personalized needs.

Find the carrier that best suits your lifestyle and enjoy a comfortable and smart mobile life!

And the answer is, undoubtedly… 【Rakuten Mobile】!

Beyond its “overwhelming affordability for unlimited data,” Rakuten Mobile offers comprehensive support for foreign residents, strong integration with the Rakuten Ecosystem for rapid point accumulation, eSIM compatibility for easy contracts, and even free overseas roaming. Rakuten Mobile meets all the demands of today’s era at a high level.

For the smartest and most comfortable mobile life in 2026, choose Rakuten Mobile without hesitation!

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