Opensignal report: au tops 10 categories, docomo and SoftBank take four each
au led the October 2026 Japan Mobile Network Experience Report, with Rakuten Mobile taking upload speed honours, according to ascii.jp.
Opensignal published the October 2026 edition of its Japan Mobile Network Experience Report on October 28, with au winning 10 awards in total, according to ascii.jp. The report is based on data collected over 90 days, from July 1 to September 28, 2026.
au's 10 awards include the reliability and consistent quality categories along with eight app experience categories, among them video and games.
NTT docomo and SoftBank each took four categories. docomo won for 5G download speed, coverage, 5G coverage and network availability, while SoftBank won for download speed and 5G availability. Rakuten Mobile won upload speed and 5G upload speed.
KDDI points to connected experience
At KDDI SUMMIT 2026, held the same day, KDDI president Matsuda promoted the company's claim of five consecutive years as Japan's No.1 in connected experience. KDDI says it is building a system that uses AI to optimize frequency allocation and areas, cutting optimization time from two years to under a month.
From October 1, 2026, KDDI's roaming agreement with Rakuten Mobile was revised.
Quick answers
What did the Opensignal October 2026 Japan report find?
au won 10 awards, SoftBank and NTT docomo won four each, and Rakuten Mobile won two.
What period does the report cover?
Data was collected over 90 days, from July 1 to September 28, 2026.
Which categories did NTT docomo win?
5G download, coverage, 5G coverage and network availability.