Japan – Internet

Who are the major internet service providers in Japan?

Japan’s fixed-line market is led by five principal providers as measured by FTTH (fibre-to-the-home) subscriber numbers: NTT Docomo, NTT East and West, SoftBank, KDDI Group, and Sony Network Communications. Alongside these major players, hundreds of smaller and regional operators serve communities across the country, so verifying availability at your specific address before making any commitment is always advisable.

NTT (Flet’s Hikari / Docomo Hikari): Flet’s Hikari is NTT’s own fibre-optic network, delivered through NTT East for residents of eastern Japan and NTT West for those in the western regions. Through the Docomo Hikari package, customers can select from 24 different ISPs layered on top of the NTT physical line — an arrangement that is distinctive to the Japanese market. Existing NTT Docomo mobile customers will find Docomo Hikari a natural fit, as bundling the two services brings a discount of roughly ¥1,100/month (as of 2025). NTT Docomo provides customer support in English, Portuguese, Chinese, and Spanish. Visit NTT’s official website or Docomo’s English portal for current plans and availability.

SoftBank (SoftBank Hikari): SoftBank Hikari is a fibre-optic broadband service operated by the SoftBank Group, with Yahoo! BB functioning as the ISP and using the physical cables of NTT East and West. Consumer surveys conducted as of September 2024 ranked SoftBank as the most widely used internet provider brand in Japan. Check SoftBank’s English website for current pricing and availability.

KDDI (au Hikari): au Hikari, operated by KDDI, pairs conveniently with au mobile contracts and stands out for providing customer support across 13 languages in major urban centres — making it one of the most accessible mainstream options for foreign residents. Au Hikari delivers consistent 1 Gbps speeds at competitive monthly rates. Visit au’s official website for details.

NURO Hikari (Sony Network Communications): NURO is Sony’s broadband offering, recognised for strong performance. The service delivers average fibre-optic download speeds of 1 Gbps, though its availability is more limited than that of the major carriers and monthly fees tend to be somewhat higher. As of June 2024, NURO is accessible across portions of the Kanto, Kansai, Tokai, Chugoku, Kyushu, Hokkaido, and Tohoku regions. Check the NURO website for current coverage and pricing.

Sakura Fiber Internet: Sakura Fiber Internet has earned a strong reputation among the expat community for its responsive English-language support and more accommodating contract terms. While the majority of Japanese providers tie customers into two- or three-year agreements, Sakura offers greater flexibility — and importantly, accepts cash payment, which suits newcomers who have not yet opened a Japanese bank account or obtained a local credit card. Visit Sakura’s website for enquiries.

Asahi Net: Asahi Net provides fibre-optic internet for both households and businesses, with high-speed plans and broad coverage in major cities alongside well-regarded customer service. Plans span a range from 100 Mbps to 10 Gbps, with monthly costs running from approximately ¥2,000 to ¥6,000 depending on speed and the length of your subscription (as of 2024). Always check directly with the provider for up-to-date figures, as pricing and promotional offers change frequently.

What types of internet connection are available in Japan?

Fibre-optic technology (光回線, hikari kaisen) dominates Japan’s residential internet market. As of 2025, roughly 59.1% of Japanese households are connected via fibre-optic lines, and the fibre network now reaches approximately 99.9% of premises across the country — placing Japan firmly among the global leaders in high-speed home broadband.

In contrast to the patchwork of fibre and copper cable infrastructure that characterises much of Western Europe and North America, Japan largely skipped the intermediate steps and moved directly to full fibre-to-the-home (FTTH) deployment. The structural arrangement also differs from most other countries: Japan operates a clear separation between the line provider — such as NTT, au, or NURO — which installs and manages the physical cable running to your property, and the ISP, which provides the actual internet service over that cable. In practice, this means you will typically enter into two separate agreements: one with a line provider and one with an ISP.

Japan’s total broadband subscriber base numbers approximately 43.8 million, comprising 36.6 million FTTH subscribers and 6.5 million cable TV internet subscribers, while mobile broadband (4G and 5G) accounts for 184 million subscriptions. Cable internet (CATV) remains available in urban areas as a lower-cost alternative to pure fibre, though the speeds on offer are generally more modest.

DSL (ADSL) connections have become largely obsolete in Japan. Once widely used, ADSL has been discontinued by the major providers due to its comparatively slow speeds. Mobile broadband — delivered via 4G or 5G home routers — is an increasingly popular alternative, particularly for apartment dwellers who face obstacles to fixed-line installation or who prefer a quick, contract-light solution.

Satellite internet is also available, primarily through Starlink and certain domestic operators, and is most relevant for residents of remote rural areas where even fibre coverage may be sparse. Major population centres such as Tokyo, Osaka, Kanagawa, Aichi, and Saitama enjoy the widest range of options; residents in rural areas may find choices considerably narrower, so checking availability before committing to a plan is always worthwhile.

How fast and reliable is the internet in Japan?

Japan’s internet infrastructure ranks among the fastest and most dependable anywhere in the world, with a fibre-optic network blanketing virtually the entire country. Residential fibre plans typically advertise maximum speeds of 1 Gbps, and ultra-fast 10 Gbps services are offered by providers such as Asahi Net and NURO in selected locations. As in every country, actual speeds experienced by users in day-to-day use fall below the advertised ceiling.

According to independent benchmarking by Opensignal (drawing on data from March 2025), NURO Hikari operates the most reliable broadband network in Japan, earning the Reliability Experience award. In the fixed wireless access (FWA) segment, au leads with average download speeds of 71.6 Mbps (as of early 2025). For up-to-date comparisons of provider speeds within Japan, the Ookla Speedtest Global Index and the Opensignal Japan reports both publish regularly refreshed data.

There is a noticeable gap between urban and rural experiences. In central Tokyo, Osaka, and other large metropolitan areas, gigabit connections are standard and latency on fibre is typically very low — often under 10ms. By 2023, an estimated 94% of the population could access a 5G signal from at least one carrier. Most cities and towns have multi-operator 5G coverage, though in remote villages access may be limited to a single carrier’s 5G network. In the more isolated parts of Honshu’s mountainous interior or on outlying islands, both speeds and choice of provider decrease considerably, and satellite connectivity may represent the most practical option.

Japan’s current average download traffic among broadband subscribers is estimated at 30.5 Tbps per day — a figure that climbed by 17.4% between May 2022 and May 2023. This data is compiled and published twice yearly by the Ministry of Internal Affairs and Communications (MIC). Readers seeking the most current traffic and coverage statistics should consult the MIC’s official website.

How do I get an internet connection set up in Japan?

Arranging a home internet connection in Japan can present real challenges for those new to the country. Navigating language barriers, understanding contract structures, and meeting installation requirements can all be daunting at first. Working through the steps below will help you get connected without unnecessary delays or confusion.

1. Confirm your building’s eligibility. Not every provider covers every address or building type. Use the provider’s online address checker — with the help of a translation tool if necessary — to verify that your home is within coverage. If a previous occupant already had fibre installed, the process may be considerably faster.
2. Obtain landlord permission. Installing a fibre-optic connection in most apartment buildings requires the consent of the landlord (大家, ooya). In owner-managed condominiums, approval from the homeowners’ association may also be required. This is a step that catches many new residents off guard. Expat-oriented providers such as Sakura Fiber can assist in handling this communication on your behalf.
3. Select a line provider and an ISP. Choose between the main physical networks — NTT Flet’s, au Hikari, or NURO — and then pick an ISP to run over that line. Many providers bundle both elements into a single plan and monthly bill, which greatly simplifies things for newcomers unfamiliar with the two-tier structure.
4. Apply online or visit a store. Most major providers maintain English-language application pages. Alternatively, you can apply in person at au, SoftBank, or specialist foreigner-friendly services such as GTN and Sakura in larger cities. You will typically need your residence card (zairyu card), passport, and proof of your current address.
5. Set up a Japanese bank account or credit card. The majority of mainstream providers require a Japanese bank account or domestic credit card for recurring direct debit payments. Sakura Fiber Internet is a notable exception, accepting cash payment — a useful feature for newcomers who have not yet opened a local bank account or obtained a Japanese credit card.
6. Book a technician visit. An engineer will come to your home to install and activate the fibre line. Under normal circumstances, allow two to four weeks between submitting your application and the installation date. In peak moving periods — March to May and August to September — the wait can extend to six to eight weeks.
7. Get your router configured and go live. The technician will typically install an Optical Network Unit (ONU) and, in some cases, a router. Confirm in advance whether a router is included in your package or whether you will need to rent or purchase one separately — rental fees run to approximately ¥550/month (as of 2024; confirm the current figure with your provider).

Can I get internet access before my permanent connection is installed in Japan?

Before committing to a fixed-line plan, it is worth considering how long you expect to stay in Japan. For shorter visits, the cost and hassle of a fixed residential connection — including installation fees and a multi-year contract — may not be worthwhile. Fortunately, there are several practical alternatives that can keep you connected from the day you arrive.

Prepaid SIM cards are straightforward to obtain at international airports, convenience stores (konbini), and large electronics retailers such as Yodobashi Camera and BicCamera. Based on Opensignal’s October 2024 report, NTT Docomo claims both the Coverage Experience and 5G Coverage Experience awards, making it a compelling choice for a temporary SIM. MVNOs (virtual operators) such as IIJmio, Mineo, and OCN Mobile One also offer competitive prepaid rates on top of the major networks.

Pocket Wi-Fi devices and portable routers can be rented at major airports or arranged for delivery to your hotel ahead of your arrival. Running on 4G or 5G networks, these devices can connect several gadgets at once and make a convenient bridge while you wait for your home fibre to be installed. Daily rental rates typically fall between ¥300 and ¥600 depending on the data allowance; check current pricing with operators such as Global WiFi, Ninja WiFi, or Wi-Ho.

eSIMs have become an increasingly attractive option for people relocating to Japan. For devices that support the technology, an eSIM sidesteps roaming charges, is simple to set up, and can be activated before you even depart your home country. Numerous international eSIM providers offer Japan-specific data packages. Verify that your handset is eSIM-compatible before depending on this option.

Public Wi-Fi is abundant in urban Japan, with free access points at convenience stores (7-Eleven, FamilyMart, Lawson), railway stations, cafés, and co-working spaces. While perfectly adequate for casual browsing, public Wi-Fi is not suitable for activities involving sensitive data such as online banking. Using a VPN whenever you connect to a public network is strongly recommended.

What does internet service typically cost in Japan?

Given the speeds and reliability on offer, Japan delivers exceptional value for money in broadband. The table below provides a general guide to typical costs; always verify current figures directly with providers, as promotional offers, discount structures, and pricing tiers are subject to regular change.

One-time setup and installation charges range from ¥0 to ¥30,000 (as of 2025), depending on the provider and any promotions running at the time. Monthly costs vary according to connection speed, contract length, and the provider selected. Bundling your home internet with a mobile phone plan from the same carrier can unlock meaningful discounts.

Customers who already use NTT Docomo for mobile can save around ¥1,100/month (as of 2025) by combining their mobile and home broadband under the Docomo Hikari package. SoftBank and KDDI offer comparable bundle arrangements. If you do not have your own compatible router, renting one from your provider will typically add ¥500–¥600 to your monthly bill (confirm current rates with your chosen provider).

Most major providers lock customers into two- to three-year contracts, with early exit fees applying if you cancel before the term ends. Sakura Fiber Internet stands apart by offering open-ended contracts with no fixed term, which is particularly attractive for expats who are uncertain about the length of their stay. For the most current pricing information, consult the MIC website and the individual provider websites.

Are there any restrictions or censorship affecting internet use in Japan?

Japan imposes little to no explicit censorship or blocking of online content. The government is bound by constitutional protections for freedom of expression and of the press, though some observers note concerns about indirect pressure that may encourage a degree of self-censorship in certain quarters. This stands in sharp contrast to countries such as China, where major international platforms are routinely blocked, or to the heavily filtered internet environments found in parts of the Middle East.

Article 21 of Japan’s constitution expressly forbids censorship and guarantees freedom of speech, freedom of the press, and all other forms of expression, as well as protecting the confidentiality of communications. These protections are substantively upheld in practice, even if certain social and legal constraints exist at the margins.

Freedom House has classified Japan’s internet environment as “free” in every annual assessment since 2013. Widely used global services — among them Google, YouTube, Facebook, Instagram, X (formerly Twitter), and major streaming platforms including Netflix — are all fully accessible from Japanese connections. No significant platforms are blocked at the network level.

The Internet Content Safety Association administers the blocking of child sexual abuse material online — a targeted and narrowly scoped measure consistent with the approach taken by most democratic nations. To address the spread of illegal and harmful content such as defamatory material, the Information Distribution Platform Act compels large-scale platform operators to accelerate their responses to removal requests and to make their operational practices more transparent (as of 2025).

VPNs are entirely legal in Japan and are widely used, including by expatriates wishing to access geo-restricted content from their home countries or to protect their data on public Wi-Fi networks. No legislation prohibits the personal use of VPN services. Using a VPN to commit illegal acts, however, remains unlawful regardless of the technology employed.

In April 2025, the government enacted the Active Cyber Defence Bill, granting law enforcement broader powers to intercept cyberattacks and to obtain information from telecommunications providers in the course of investigations, while incorporating safeguards governing the handling of sensitive data. Expats — particularly those working in roles involving sensitive communications — should remain aware of this evolving area of law.

What should I know about mobile data and SIM cards in Japan?

Japan’s mobile market is served by three established major carriers and a growing fourth operator. NTT Docomo leads the mobile market with approximately 42% of subscriptions, followed by KDDI at around 30% and SoftBank at 25–26%. SoftBank also holds approximately 21% of internet access as measured by broader usage surveys. Rakuten Mobile, which launched its own network in 2020, is Japan’s fourth operator and has been steadily growing its subscriber base.

NTT Docomo is the largest telecommunications company in Japan, operating high-speed 4G and 5G mobile plans and providing coverage to more than 99% of the population on 4G and over 70% on 5G (based on available data). For independent and regularly updated coverage comparisons across all carriers, consult the Opensignal Japan reports.

Foreign nationals purchasing a SIM card in Japan will generally need to present their passport; long-term residents will also need their residence card. Registration is a legal requirement — it is not possible to purchase a SIM anonymously. According to local regulator MIC, visitors using foreign handsets bearing FCC or CE certification (but not the Japanese Giteki mark) may use them with a local SIM for up to 90 days without contravening regulations.

eSIMs are now supported by all three major carriers and by a wide variety of international eSIM providers offering Japan-specific data packages. Since eSIMs can be purchased and activated before you travel, they are particularly convenient for those relocating to Japan. A range of MVNOs (mobile virtual network operators) — including IIJmio, Mineo, and OCN Mobile One — offer SIM-only plans that run on the infrastructure of the major networks at lower monthly costs than contracting directly with one of the big carriers.

International roaming via a home-country SIM is technically possible in Japan, as most major global carriers maintain roaming agreements with Docomo, KDDI, or SoftBank. However, roaming data charges tend to be steep and represent poor value for anything beyond the first day or two after arrival. Switching to a local prepaid SIM or an eSIM as soon as possible after landing is strongly advisable for managing costs. Check the current roaming rates with your home carrier directly before you depart.

Who regulates internet and telecoms services in Japan?

The Ministry of Internal Affairs and Communications (MIC) is responsible for regulating internet and IP-based services — encompassing high-speed broadband and voice over IP — as well as wired telephony and mobile networks, under the framework of the Telecommunications Business Act. The MIC is a government ministry rather than an arm’s-length independent regulator, which distinguishes it from bodies such as Ofcom in the United Kingdom or the FCC in the United States.

While the MIC has oversight of the telecommunications, internet, and broadcast sectors, the regulation of Japan’s internet industry relies heavily on industry self-regulation. Commentators generally note that standards have improved since the MIC’s formation in 2001, which came about through the merger of the Ministry of Home Affairs, the Ministry of Posts and Telecommunications, and the government’s Management and Coordination Agency.

The Telecommunications Business Act and its accompanying regulations place strong emphasis on preserving the confidentiality of communications and ensuring that telecoms services are delivered reliably and on a non-discriminatory basis. This framework gives consumers legal protections covering both the privacy of their communications and the right to equitable access to telecoms services.

For expats, the MIC’s website serves as a valuable reference point for understanding the regulatory environment, accessing official coverage and quality statistics, and learning about your consumer rights. The MIC publishes broadband traffic data twice a year and oversees the obligations placed on major providers. You can access the MIC’s English-language portal at soumu.go.jp/english. If you wish to raise a complaint about a telecoms provider, you may also approach the MIC or the Telecommunications Consumer Centre (テレコム消費者窓口), which is operated by the Telecommunications Carriers Association and handles consumer disputes relating to telecoms services.

FAQ: Internet access in Japan for expats

Do I need a Japanese bank account to sign up for home internet in Japan?

The majority of mainstream providers — including NTT, SoftBank, and KDDI — require either a Japanese bank account or a domestic credit card to process monthly payments by direct debit. Sakura Fiber Internet is a notable exception, as it accepts cash payment, making it a practical option for newcomers who have not yet opened a local bank account or obtained a Japanese credit card. Getting a bank account established early in your relocation — for example at Japan Post Bank or a major city bank — will remove this obstacle for most providers.

How long does it take to get the internet set up in a new apartment in Japan?

In ordinary circumstances, you should allow two to four weeks between submitting your application and the technician completing your installation. During Japan’s peak moving periods — March to May and again in August to September — waiting times can extend to six to eight weeks. Submitting your application as soon as you have a confirmed address is highly recommended, especially if you are moving in the spring.

Can I use my home-country SIM card in Japan?

International roaming is available in Japan through agreements between most global carriers and Japanese networks. However, data roaming charges are typically very high for anything beyond brief use immediately after arrival. For the vast majority of newcomers, purchasing a local prepaid SIM card or activating a Japan-specific eSIM on arrival is far more economical. Note that visitors with handsets bearing FCC or CE certification may legally use a local SIM for up to 90 days under MIC regulations.

Is the internet censored or restricted in Japan?

Japan imposes little to no explicit censorship or blocking of online content, and the government is constitutionally bound to respect freedom of expression and of the press. All major global platforms — including Google, YouTube, Netflix, Instagram, and X — are freely accessible. VPNs are legal and used widely across the country.

What is the best internet provider for foreign nationals in Japan?

The right provider depends on your specific location, budget, and how flexible you need your contract to be. Sakura Fiber Internet is frequently recommended by the expat community for its accessible English support and its more open contract terms, compared with the two- to three-year commitments typical of most Japanese providers. KDDI’s au Hikari is also particularly notable for offering customer support in 13 languages in major cities. For the most current data on provider performance, refer to the latest Opensignal and Ookla benchmarks.

Do I need my landlord’s permission to install broadband in Japan?

In the majority of apartment buildings, fitting a fibre-optic connection requires the landlord’s consent. If you live in a managed condominium, approval from the homeowners’ association may be required in addition. This requirement surprises many new arrivals. Some providers with a focus on the expat market, such as Sakura Fiber, are willing to contact your landlord directly and manage the approval process on your behalf.

Are eSIMs available in Japan for newcomers?

Yes — all three of Japan’s major carriers (Docomo, au, and SoftBank) offer eSIM support, as do numerous international eSIM providers with Japan-specific data plans. For compatible devices, an eSIM is a highly practical choice: it eliminates roaming charges, is straightforward to set up, and can be activated before you even board your flight to Japan. Make sure your smartphone is eSIM-capable before relying on this option, and take time to compare available plans.

What should I do if I have a problem with my internet provider in Japan?

If a dispute with your provider cannot be resolved through direct contact, you can escalate the matter to the Ministry of Internal Affairs and Communications (MIC) or to the Telecommunications Consumer Centre (テレコム消費者窓口), which is managed by the Telecommunications Carriers Association and handles consumer complaints about telecoms services. The Telecommunications Business Act requires providers to deliver services reliably and without discrimination, so consumers are afforded meaningful formal protections. The MIC’s English portal can be found at soumu.go.jp/english.