Opensignal Announces Latest Japan Mobile Network User Experience Report
Opensignal has released its latest Japan Mobile Network User Experience Report for April 2026. au secured the top spot for 'Consistent Quality', Rakuten Mobile led in upload speeds, and NTT Docomo excelled in 5G download speeds, highlighting the strengths of the major four carriers.
📋 Article Processing Timeline
- 📰 Published: April 28, 2026 at 20:00
- 🔍 Collected: April 28, 2026 at 11:31
- 🤖 AI Analyzed: April 28, 2026 at 12:58 (1h 26m after Collected)
Opensignal (Headquartered in London) has announced its latest Japan Mobile Network User Experience Report (April 2026). This report comprehensively analyzes the quality of mobile networks experienced by users of Japan's four major mobile network operators (au, NTT Docomo, Rakuten Mobile, and SoftBank) over a 90-day period from January 1, 2026, to March 31, 2026.
**Key Findings**
**au secures top spot for "Consistent Quality"**
au received the highest rating for "Consistent Quality," indicating consistent user experience. It also secured sole first place in "Voice App Experience" and "5G Games Experience."
**Rakuten Mobile leads in upload categories**
Rakuten Mobile maintained a dominant lead over other companies in overall "Upload Speed Experience" and "5G Upload Speed."
**NTT Docomo takes first place in "5G Download Speed"**
NTT Docomo received the highest rating for download speed in a 5G network environment.
**SoftBank maintains download speeds and 5G availability**
Compared to the previous report, SoftBank's download speed improved by 17%, making it the winner in the "Download Speed Experience" category, and it maintained its sole leading position in "5G Availability."
**au ranks first in "Games Experience" and "5G Games Experience"**
au topped the regional awards in Japan, recording 45 sole awards and 46 joint awards across eight regions. It also achieved a complete sweep in both "Games Experience" and "5G Games Experience" categories.
**Trends in Japan's Mobile Network Market**
According to Opensignal's latest report, each company in Japan's mobile network market is leveraging its strengths to provide high-quality services.
au demonstrates excellent results in "Consistent Quality" and voice and game experiences, providing a stable network.
Rakuten Mobile maintains superiority in overall and 5G upload speed-related metrics, contributing to improved communication speeds. NTT Docomo has a strong advantage in 5G download speeds, and au, tied with SoftBank, received high praise in game experience, indicating that each company continues to compete to improve user experience.
**Reference Materials**
Download Japan Mobile Network User Experience Report:
https://insights.opensignal.com/reports/2026/04/japan/mobile-network-experience
Note: The content is a translation of the English version. In case of discrepancies between the Japanese and English content, the English version shall prevail.
**About Opensignal**
Opensignal is a global provider of independent insights into consumer network experience and decision-making. Operators can leverage our unique insights into mobile and broadband networks to gain improved profitability and solutions to stay competitive in the industry, from executive-level scorecards and public verification to specific levels of engineering analysis and consumer decision-making. Our analysis methodology is unique and highly transparent, helping all operators continuously improve network connectivity. We are headquartered in the US, Canada, and the UK, with operational bases in South America and Asia.
**Key Findings**
**au secures top spot for "Consistent Quality"**
au received the highest rating for "Consistent Quality," indicating consistent user experience. It also secured sole first place in "Voice App Experience" and "5G Games Experience."
**Rakuten Mobile leads in upload categories**
Rakuten Mobile maintained a dominant lead over other companies in overall "Upload Speed Experience" and "5G Upload Speed."
**NTT Docomo takes first place in "5G Download Speed"**
NTT Docomo received the highest rating for download speed in a 5G network environment.
**SoftBank maintains download speeds and 5G availability**
Compared to the previous report, SoftBank's download speed improved by 17%, making it the winner in the "Download Speed Experience" category, and it maintained its sole leading position in "5G Availability."
**au ranks first in "Games Experience" and "5G Games Experience"**
au topped the regional awards in Japan, recording 45 sole awards and 46 joint awards across eight regions. It also achieved a complete sweep in both "Games Experience" and "5G Games Experience" categories.
**Trends in Japan's Mobile Network Market**
According to Opensignal's latest report, each company in Japan's mobile network market is leveraging its strengths to provide high-quality services.
au demonstrates excellent results in "Consistent Quality" and voice and game experiences, providing a stable network.
Rakuten Mobile maintains superiority in overall and 5G upload speed-related metrics, contributing to improved communication speeds. NTT Docomo has a strong advantage in 5G download speeds, and au, tied with SoftBank, received high praise in game experience, indicating that each company continues to compete to improve user experience.
**Reference Materials**
Download Japan Mobile Network User Experience Report:
https://insights.opensignal.com/reports/2026/04/japan/mobile-network-experience
Note: The content is a translation of the English version. In case of discrepancies between the Japanese and English content, the English version shall prevail.
**About Opensignal**
Opensignal is a global provider of independent insights into consumer network experience and decision-making. Operators can leverage our unique insights into mobile and broadband networks to gain improved profitability and solutions to stay competitive in the industry, from executive-level scorecards and public verification to specific levels of engineering analysis and consumer decision-making. Our analysis methodology is unique and highly transparent, helping all operators continuously improve network connectivity. We are headquartered in the US, Canada, and the UK, with operational bases in South America and Asia.