Just like Indonesia has its “big three” mobile operators—Telkomsel, Indosat, and XL—Japan also has its own top three telecom giants: SoftBank, NTT Docomo, and KDDI which operates under the brand name au or au by KDDI.
These three major Japanese telecom providers offer exceptionally fast and stable internet services. But what exactly makes them so successful in developing one of the most advanced internet networks in the world?
SoftBank
SoftBank was originally founded as a software company, but over time it evolved into one of Japan’s leading telecommunications providers, expanding its presence across various tech sectors.
SoftBank offers a wide range of services, including:
- Mobile Telecommunications: SoftBank provides mobile phone and data services for prepaid, postpaid, and 5G users. It was one of the pioneers in implementing 5G networks in Japan.
- Home Internet: SoftBank offers fiber-optic internet services for residential use, along with SoftBank Air— a portable, wireless internet router solution.
- IoT Services: SoftBank actively develops Internet of Things (IoT) solutions for industries and businesses, connecting physical devices such as appliances, vehicles, and sensors to create smart environments.
- Streaming & Entertainment: SoftBank users can access various digital entertainment services, including movies, music, and streaming platforms.
SoftBank is recognized for its expansive and fast 5G network, and is also a leader in cutting-edge technologies such as AI and IoT. The company offers flexible telecom packages, entertainment bundles, and attractive loyalty programs.
As of 2024, SoftBank ranks 38th among the largest public companies in Japan according to Forbes, making it the third-largest telecom company in the country after NTT Docomo and KDDI.
NTT Docomo
NTT Docomo is a subsidiary of Nippon Telegraph and Telephone (NTT), which explains its official name. In 2024, NTT ranks as the fifth-largest public company in Japan, trailing only behind Toyota, Mitsubishi UFJ Financial, Sumitomo Mitsui Financial, and Sony—making NTT Docomo the largest telecommunications company in Japan.
NTT Docomo is widely regarded as a pioneer in Japan’s mobile technology development. Its services include:
- Mobile Telecommunications: Offering prepaid, postpaid, and 5G services, NTT Docomo was one of the first providers to roll out 5G in Japan.
- Home Internet: High-speed fiber-optic internet ideal for streaming, gaming, and remote work.
- IoT Solutions: Advanced IoT systems for businesses and industries, including smart agriculture innovations.
- Streaming & Entertainment: Through the dmenu platform, users can access news, apps, digital content, and streaming services for music and film.
NTT Docomo is known for its strong reputation and reliable networks, including a rapidly growing 5G infrastructure. With responsive customer service and a wide range of digital services, it offers users a seamless and enjoyable experience.
KDDI “au”
The third major telecom operator in Japan is KDDI, best known for its mobile brand au or au by KDDI. In 2024, KDDI ranks 13th among Japan’s largest public companies, making it the second-largest telecom provider after NTT Docomo.
KDDI provides similar services to SoftBank and NTT Docomo, such as:
- Mobile Telecommunications: Offering flexible prepaid, postpaid, and 5G mobile services, and being one of the early adopters of 5G.
- Home Internet: High-speed fiber-optic internet for stable and reliable home connectivity.
- IoT Solutions: Customized IoT services supporting industries like transportation, healthcare, and manufacturing.
KDDI is known for its competitive plans, blazing-fast fiber internet, and continuous investment in new tech innovations, particularly in the IoT space.
Despite being three different companies, SoftBank, NTT Docomo, and KDDI all offer incredibly fast and stable internet connectivity. This aligns with the fact that, in July 2024, Japan officially set a world record for the fastest internet speed, reaching a staggering 402 Tbps!
You can also enjoy this level of high-speed connectivity during your trip to Japan—at a much more affordable price—by using a Japan eSIM from Global Komunika.
The Global Komunika Japan eSIM guarantees fast, stable internet access and automatically connects to the local network once you arrive in Japan. Simple and hassle-free!
So, don’t wait—get your Japan eSIM from Global Komunika today and stay connected wherever you go in Japan!
