Finding reliable internet providers in Japan usually entails navigating a crowded field of fiber, cable, and mobile-bundled providers, but not anymore! We have rounded up a list of leading telecoms to help you compare at a glance regardless of your location or budget.
Additional info on requirements and customer care contacts is provided to help you request installation from the comfort of your home or business.
55 Best internet providers in Japan
Discover the leading network providers in Japan, featuring the country’s top ranked ISP companies delivering fibre, broadband, mobile, satellite, and enterprise internet services for homes and businesses.
Which is the fastest ISP in Japan?
1. NTT Docomo Hikari
NTT Docomo Hikari delivers dependable fiber-optic broadband across nearly all of Japan through the country’s largest mobile carrier.
Telephone
0120-800-000
Website
www.docomo.ne.jp
Subscribers receive bundled discounts on Docomo mobile plans, and the provider’s shops offer an on-call interpreter service for foreign customers.
2. SoftBank Hikari
SoftBank Hikari ranks among Japan’s most popular fiber options thanks to its extensive coverage and generous mobile bundle discounts.
Telephone
0800-111-2009
Website
www.softbank.jp
Customers can reach support center for billing questions, relocation requests, or technical troubleshooting, though phone assistance operates only in Japanese.
3. au Hikari (KDDI)
KDDI’s au Hikari combines high-speed fiber internet with optional phone and multi-channel TV services in one contract.
Dial the toll-free number for installation scheduling, plan changes, or fault reports, and select au shops provide multilingual assistance.
4. NURO Hikari
Sony’s NURO Hikari stands out for its remarkable speeds, reaching up to 10 Gbps for downloads in covered regions.
Telephone
0570-099-118
Website
www.nuro.jp
Applicants sign up with no lock-in contract and no cancellation fee, though the support desk keeps limited weekday hours and can involve long call queues.
5. Rakuten Hikari
Rakuten Hikari appeals to budget-conscious households through Rakuten Point rewards layered onto standard fiber pricing.
Telephone
0120-987-300
Website
www.mobile.rakuten.co.jp
Members manage most account changes through the online Members Station, while phone agents handle new applications, router setup, and cancellation requests.
6. J:COM NET
J:COM NET brings fiber and cable internet together with television and mobile plans under a single regional provider.
Telephone
0120-999-000
Website
www.jcom.co.jp
Households request installation, report outages, or adjust billing through the toll-free customer center, and interpreters assist non-Japanese speakers on request.
7. Asahi Net
Asahi Net has earned repeated recognition for customer satisfaction among Japan’s fiber-optic providers.
Telephone
03-6631-0861
Website
www.asahi-net.jp
Foreign residents value its dedicated English telephone line and web-based inquiry forms for account and technical support.
8. GTN Hikari
GTN Hikari targets foreign residents by pairing SoftBank’s fiber network with support in seven languages.
Telephone
03-5155-4673
Website
www.gtn-mobile.com
Prospective subscribers apply directly through the multilingual website, and staff guide contract signing, installation scheduling, and cancellations in the customer’s preferred language.
9. Sakura Fiber Internet
Sakura Mobile’s Sakura Fiber internet runs on the reliable FLET’S Hikari network while offering full English-language support.
Telephone
+81-3-5937-5869
Website
www.sakuramobile.jp
New and existing users reach English-speaking agents by phone or email for setup guidance, billing questions, and troubleshooting.
BIGLOBE Hikari rounds out this list with flexible plans and a long-standing partnership across NTT’s fiber network.
Telephone
0120-86-0962
Website
www.join.biglobe.ne.jp
Callers choose from separate lines for information requests, technical support, and relocation, keeping wait times shorter than a single combined queue.
It is evident that the Japanese internet market with a population of about 122 million is highly competitive, with established telecommunications giants rivaling regional and specialized internet service providers.
Internet coverage across prefectures in Japan
No
Prefecture
Pop
1
Hokkaido
5.1m
2
Aomori
1.2m
3
Iwate
1.2m
4
Miyagi
2.3m
5
Akita
0.9m
6
Yamagata
1m
7
Fukushima
1.7m
8
Ibaraki
2.8m
9
Tochigi
1.9m
10
Gunma
1.9m
11
Saitama
7.3m
12
Chiba
6.3m
13
Tokyo
14.2m
14
Kanagawa
9.2m
15
Niigata
2.1m
16
Toyama
1m
17
Ishikawa
1.1m
18
Fukui
0.7m
19
Yamanashi
0.8m
20
Nagano
2.0m
21
Gifu
1.9m
22
Shizuoka
3.5m
23
Aichi
7.5m
24
Mie
1.7m
25
Shiga
1.4m
26
Kyoto
2.5m
27
Osaka
8.8m
28
Hyogo
5.4m
29
Nara
1.3m
30
Wakayama
0.9m
31
Tottori
0.5m
32
Shimane
0.7m
33
Okayama
1.9m
34
Hiroshima
2.7m
35
Yamaguchi
1.3m
36
Tokushima
0.7m
37
Kagawa
0.9m
38
Ehime
1.3m
39
Kochi
0.7m
40
Fukuoka
5.1m
41
Saga
0.8m
42
Nagasaki
1.3m
43
Kumamoto
1.7m
44
Oita
1.1m
45
Miyazaki
1m
46
Kagoshima
1.5m
47
Okinawa
1.5m
In conclusion, this guide highlights various providers that deliver excellent connectivity enabling you to explore Japan’s top ISP companies for your home or business.
Bsc. Mechatronics engineer & founder of Rejnac Group Inc. with a strong passion for Robotics, networking, ICT, digital marketing, and AI applications. My goal in this web project is to highlight exciting tech trends that are transforming your living room and workspaces. DM on WhatsApp for inquiries, email [email protected] to advertise, or Gift Rejnac editorial team.
