Japan Mobile Network Performance H1 2026: SoftBank Leads 5G Speed, DoCoMo Tops Availability

Japan mobile network performance in H1 2026 showed intense competition among SoftBank, NTT DoCoMo, au and Rakuten Mobile, with no single operator dominating every network metric. SoftBank emerged as the strongest operator for overall connectivity and 5G speed, NTT DoCoMo delivered the widest 5G availability, while Rakuten Mobile led overall network consistency. Japan best 5G services The findings from Ookla’s Japan Connectivity Report H1 2026 highlight how Japanese operators are competing across