If you prioritize network coverage and speed, NTT Docomo may be the best option for you. Three major nationwide operators dominate the Japanese mobile market: NTT Docomo – The market leader and the provider with the best nationwide coverage and over 70 million subscribers. These carriers offer a range of services, including mobile voice and data, fixed-line internet, and television. Detailed speed, price, and English support breakdown for NTT Docomo, SoftBank, au, NURO Hikari, GTN Hikari, and Sakura Fiber Internet. However, some of them have an inconsistent signal on smaller and more remote. Any recommendations on cheaper carriers with faster internet connection? Honestly, like any of them will be better than what you have now- it's more about what perks you want and how much data you need. If you use the Rakuten ecosystem, want unlimited data, and dont mind some occasionally poor. Each of these companies offers high-quality call and data services, along with robust customer support in their shops, making them recommended for those who prioritize quality. Now 40% Off! MATCHA Japan eSIM: 5 Reasons to Choose It 1. NTT Docomo Picture courtesy of PR TIMES NTT Docomo boasts the.