Best Home Broadband in Japan with a Static IP Address : Complete Price, Speed and Application Guide

Research updated: October 19, 2026 · Coverage: Tokyo and Japan nationwide · Focus: Residential fiber internet with one dedicated public static IPv4 address

Japan has some of the world’s fastest residential fiber broadband services, with 1 Gbps and 10 Gbps connections increasingly available. However, finding an affordable home internet connection with a genuine static public IPv4 address (固定グローバルIPアドレス) is more complicated than comparing ordinary fiber plans.

The good news is that you do not necessarily need an expensive corporate broadband contract. Several Japanese providers offer static IPv4 services to individual customers, and some packages cost less than ¥5,000 per month in an apartment.

This guide compares the prices, speeds, eligibility requirements, setup methods and application procedures published by Japanese internet service providers.

1. Best choices: Research findings

The strongest options depend on whether you need a new fiber connection or a static-IP ISP for a fiber line you already have.

Provider	Published monthly price	What’s included	Official application or plan
en Hikari (enひかり)	¥4,290–¥5,390	Complete 1 Gbps-class home fiber + one static IPv4; apartment versus detached house	Static IP details · Broadband application
Interlink ZOOT NEXT	¥1,320	ISP and one static IPv4; NTT FLET’S access charged separately	Plans and trials
GMO Tokutoku BB	¥1,452	Fixed-IP PPPoE ISP; NTT FLET’S access charged separately	Fixed IP pricing

My recommendation: For a new home connection in Tokyo, en Hikari is the strongest price-first choice because it combines fiber service and a genuine static IP option on one account. If you already have a compatible FLET’S connection, Interlink, GMO or 21ip.jp could avoid replacing your broadband line.

2. Comparison of verified static IP providers

The following figures are published prices in Japanese yen, including tax. They are standard service charges, not estimated campaign discounts.

Provider	Fixed IPv4 service, monthly	Access type	Connection speed class
en Hikari	¥770 add-on	Bundled fiber + ISP	Up to 1 Gbps on standard plan
Interlink ZOOT NEXT	¥1,320	ISP only, FLET’S separate	Depends on FLET’S tier
GMO Tokutoku BB	¥1,452	ISP only, FLET’S separate	Up to 1 Gbps class
ASAHI Net	¥1,980 add-on	Eligible ISP/fiber plan required	1 Gbps / 10 Gbps classes
21ip.jp PPPoE	¥2,200	ISP only, FLET’S separate	Up to 1 Gbps
21ip.jp IPoE	From ¥2,550	ISP only, FLET’S separate	Up to 1 Gbps
Kamome Internet PPPoE	¥3,458 total ISP	ISP only, fiber separate	Depends on fiber
Kamome Internet IPoE	¥3,730 total ISP	ISP only, fiber separate	Up to 1 Gbps class
21ip.jp Hikari Cross	¥3,480	ISP only, fiber separate	Up to 10 Gbps
Kamome Hikari Cross	¥4,400 total ISP	ISP only, fiber separate	Up to 10 Gbps

Important: These amounts are not all-inclusive broadband totals. en Hikari’s ¥770 is an add-on to its bundled broadband plan. ISP-only prices require a separate fiber access contract. ASAHI Net requires an eligible underlying plan. Speed figures are access-line maximums, not guaranteed throughput.

3. What does a static IP actually mean?

A residential internet provider typically assigns an IP address dynamically. Sometimes it remains unchanged for months, but that does not mean it is contractually reserved for you.

A true static public IPv4 address is assigned to your connection as a stable, publicly routable address.

Feature	Dynamic IPv4	Static public IPv4
IP address guaranteed unchanged	No	Yes, while assignment remains valid
Remote VPN hosting	Sometimes	Yes, with correct configuration
DNS A record without dynamic updates	Not reliably	Yes
Business IP allowlisting	Inconvenient	Suitable
Hosting personal web services	Depends on ISP/NAT	Technically suitable
Extra fee	Often none	Usually required
Public inbound connectivity	Not always	Depends on ISP, routing and firewall

One critical distinction: A static IP does not automatically make your server accessible from the internet. You must also verify inbound connections, port restrictions, routing and NAT/firewall settings.

For a home server, NAS, Docker lab, VPN gateway or self-hosted development environment, request one fixed global IPv4 address — not merely IPv6 connectivity, dynamic DNS, or a semi-fixed address.

4. Detailed review of the best providers

Option 1: en Hikari — Best for a new residential connection

en Hikari (enひかり) offers NTT-based fiber broadband with the internet service provider included, plus an optional dedicated static IPv4 address.

This is appealing because the customer does not need to maintain separate NTT and ISP subscriptions.

Monthly cost for standard 1 Gbps-class broadband

Item	Apartment	Detached house
Fiber + internet provider	¥3,520	¥4,620
One static IPv4	¥770	¥770
Total	¥4,290	¥5,390
Optional v6 Plus	+¥198	+¥198
Total with v6 Plus	¥4,488	¥5,588

Published fixed-IP activation fee: ¥2,200. Separate broadband administration and installation charges can apply.

Key features

Residential and individual contracts supported.
One dedicated global IPv4 address available.
NTT FLET’S infrastructure across serviceable areas of Japan.
No minimum fixed-IP contract period according to the official terms.
IPv4 over IPv6 fixed-IP configuration is supported with compatible equipment.

en Hikari specifically publishes a v6 Plus fixed-IP (IP-in-IP) configuration procedure and compatible router families, including selected Yamaha and NEC equipment. This is important because regular shared-address v6 Plus and the dedicated fixed-IP implementation are not interchangeable.

How to apply

Open en Hikari’s official website.
Select the normal residential en Hikari plan, not an unrelated service.
Confirm your address is covered and whether the building qualifies for the apartment rate.
Request the enひかり固定IP1 option.
If choosing IPv6, specify that you need fixed IPv4 with v6 Plus IP-in-IP, not ordinary shared-IPv4 v6 Plus.
Confirm a compatible router, installation fees and inbound port availability before completing the order.

You can also contact the new-contract desk at 0120-91-5586 or customer support at 03-5534-9997.

Option 2: Interlink — Best low-cost standalone ISP

Interlink is worth investigating when you already subscribe to NTT FLET’S fiber and want to add or change the ISP rather than order new fiber infrastructure.

Its ZOOT NEXT service provides one fixed IPv4 address using PPPoE for a published residential FLET’S ISP rate of ¥1,320 per month.

Item	Details
ISP + one fixed IPv4	¥1,320/month
Separate NTT fiber access charge	Required
Connection mode	PPPoE

Interlink also offers ZOOT NATIVE with a fixed IP at ¥2,200 monthly, and the separate MyIP VPN service for ¥1,100 monthly.

The MyIP service is not a replacement for broadband: it routes selected traffic through a VPN to provide a fixed outward-facing address. It can be convenient for outbound allowlisting, but it is not automatically equivalent to placing a directly reachable static IPv4 on your home router.

How to apply: Visit Interlink’s official static-IP comparison and choose the appropriate ZOOT fiber product. Check the exact supported FLET’S line and take advantage of an advertised trial if eligible.

Option 3: GMO Tokutoku BB — Low-cost conventional PPPoE alternative

GMO’s fixed-IP service is another good choice for users with compatible NTT fiber subscriptions.

Fixed IPv4: ¥1,452/month, excluding fiber access.
Method: IPv4 PPPoE.
Individual customers: Supported.
Application: New subscription or existing GMO account via BBnavi.

GMO increased its relevant one-IP pricing in April 2025, and the ¥1,452 rate is reflected in its published current plan. The standard v6 Plus service does not itself provide a dedicated public IPv4; GMO offers a separate IPv6 Cross Path fixed-IP product for eligible existing customers.

For existing subscribers, GMO documents the application path as BBnavi → Other Connection Services → Fixed IP → New Application → 1 IP.

How to apply: GMO fixed IP official website.

Option 4: ASAHI Net — Flexible across different NTT fiber contracts

ASAHI Net’s offering is particularly useful because its fixed IPv4 option supports both conventional PPPoE and compatible IPv4-over-IPv6 IP-in-IP connections.

Item	Details
Fixed IPv4 monthly add-on	¥1,980
Fixed IPv4 activation fee	¥1,980
Eligible fiber speed classes	1 Gbps / 10 Gbps

The underlying ASAHI Net internet plan is extra, with eligibility including AsahiNet Hikari, supported FLET’S contracts and ASAHI Net Docomo Hikari configurations.

Its 10 Gbps-class fixed-IP connection requires the compatible IPv4-over-IPv6 approach, rather than PPPoE.

How to apply: Visit ASAHI Net fixed IP service. Subscribe to a supported internet plan, then add the static IPv4 option from the account management page. ASAHI Net also lists telephone assistance on 0120-577-108.

Option 5: 21ip.jp — Worth considering for technical users and 10G access

21ip.jp publishes several services for NTT East and NTT West customers, including both PPPoE and IPv6-based fixed-IP access.

Connection	Static IPv4 ISP fee	Advertised access speed
Hikari Next PPPoE	¥2,200/mo	Up to 1 Gbps, depending on line
Hikari Next IPoE	From ¥2,550/mo	Up to 1 Gbps
Hikari Cross fixed IPv4	¥3,480/mo	Up to 10 Gbps

These are ISP fees; the FLET’S access circuit is billed separately. The published plans cover individual as well as corporate customers, with availability based on the NTT line type.

How to apply: Use the plan-specific signup links on 21ip.jp’s service page. For a Hikari Cross connection, confirm your access-line ID, access key and router support.

Option 6: Kamome Internet — Alternative with clear IP option pricing

Kamome publishes straightforward residential ISP rates plus static IP options.

Service	ISP base	Fixed IP option	Total ISP cost
Basic PPPoE	¥2,410	¥1,048	¥3,458
v6 Plus, 1G-class	¥2,410	¥1,320	¥3,730
v6 Plus, 10G-class	¥3,080	¥1,320	¥4,400

The fiber access line is not included. Published fixed-IP option activation fees vary by type, with a ¥1,100 fee listed for v6 Plus.

Kamome supports eligible NTT FLET’S and compatible optical-collaboration lines, but not arbitrary proprietary networks such as NURO or au Hikari.

How to apply: Kamome official application form. The online form lets applicants select an individual contract and the desired ISP service.

5. Which plan is actually cheapest over one year?

ISP-only prices can appear deceptively inexpensive. The useful comparison is the whole internet bill, not just the static-IP surcharge.

Here is the standard residential en Hikari example without optional v6 Plus, router rental, or one-time charges.

Home type	Monthly broadband + fixed IPv4	Annual recurring cost
Apartment, 1 Gbps class	¥4,290	¥51,480
Detached house, 1 Gbps class	¥5,390	¥64,680

These are calculated recurring costs using the listed published rates, not quotes. Actual billing can also include statutory line charges, installation, equipment and other options.

6. What about 10 Gbps fiber with a static IP?

If high speed is the priority, Japan has several credible alternatives to traditional 1 Gbps home fiber.

One particularly interesting offering is en Hikari Cross, which advertises up to approximately 10 Gbps in both directions, subject to service-area and hardware limitations.

10G arrangement	Monthly fee
en Hikari Cross with v6 Plus	¥4,917
en Hikari fixed IPv4 option	¥770
Potential combined monthly cost	¥5,687
21ip.jp Hikari Cross static IPv4 ISP	¥3,480 + NTT line
Kamome 10G v6 Plus with fixed IP	¥4,400 + NTT line

The ¥5,687 en Hikari figure is calculated by adding published charges, not a provider-issued quotation for the final combination. en Hikari confirms that its 10G service offers fixed-IP-compatible router choices, but you should obtain written confirmation of the exact IPv4 option and hardware before ordering.

A 10 Gbps subscription does not guarantee a 10 Gbps speed-test result, nor does it guarantee that the fixed IPv4 path performs at the same speed as IPv6. Real-world results depend on the router, Ethernet interfaces, endpoint capacity, ISP routing and network congestion.

For development servers, continuous uploads, self-hosted sites and remote access, I would prioritize a reliable fixed-IP implementation and a high-quality router over buying 10 Gbps merely for the headline speed.

7. Applying for static IP broadband in Japan

Check your building and fiber availabilityConfirm whether you live in an apartment (マンション) or detached house (戸建て). Check NTT East availability for Tokyo and surrounding prefectures through FLET’S East. Apartment eligibility is determined by building facilities, not simply the fact that the home is an apartment.
Choose whether to replace or retain your broadbandFor a completely new connection, select a combined product such as en Hikari. If you already have a directly billed NTT FLET’S fiber line, investigate ISP-only alternatives first. For an existing Hikari Collaboration contract, confirm whether a separate PPPoE provider session is permitted.
Ask explicitly for one dedicated public static IPv4 addressUse the Japanese wording 固定グローバルIPv4アドレスを1個希望します. Request confirmation that it is not shared IPv4 or CGNAT.
Confirm server and inbound connectivityAsk whether ports 80, 443 and a VPN port of your choice can be used. Verify that the router supports the provider’s fixed-IP method and can forward inbound connections.
Submit the applicationSupply the required name, service address, contact details, billing information and — if changing providers — any necessary transfer or provider-change authorization code. Do not cancel a working fiber contract prematurely.
Configure and verify the connectionWhen activated, configure the provider’s PPPoE or supported IPoE fixed-IP mode. Validate the address and test inbound connectivity from an independent network.

Japanese message to send to the provider

This can be copied into an enquiry form, email or support chat.

お世話になっております。

東京都内の自宅で利用する光インターネット回線を検討しております。

個人契約で、固定グローバルIPv4アドレスを1個利用したいと考えています。

以下について教えていただけますでしょうか。

個人契約で固定グローバルIPv4アドレスを1個利用できますか。
1Gbpsおよび10Gbpsプランの月額総額（税込）はいくらですか。
初期費用、工事費、ルーター費用はいくらですか。
固定IPv4アドレスで外部からの着信通信を利用できますか。
TCP 80番、443番、およびVPN用ポートの利用は可能ですか。
自宅でのWebサーバー、VPNサーバー、NAS等の運用は利用規約上認められていますか。
固定IPv4アドレスに対応するルーターの機種を教えてください。
上り通信速度や通信量に制限はありますか。
契約期間、解約費用、開通までの期間を教えてください。

個人向けの最も安価なプランを希望しています。

よろしくお願いいたします。

8. Router, networking and self-hosting considerations

For a technical home-network setup, the connectivity model matters as much as the plan’s advertised speed.

Typical home network with one public fixed IPv4 address:

Internet / remote users
          |
Fiber ISP (one fixed public IPv4)
          |
    Router / firewall
   (NAT and VPN rules)
          |
    Home LAN / switch
      /           \
Home server / NAS   Laptops / devices

Technical checklist before purchasing

Use this checklist when requesting confirmation from a provider:

[ ] The assigned IPv4 is public, dedicated and contractually fixed.
[ ] Inbound TCP 80 and 443 are permitted.
[ ] Home web/VPN server use is allowed by the service terms.
[ ] The router supports the specific PPPoE or IP-in-IP method.
[ ] The provider does not impose unsuitable upload or traffic restrictions.
[ ] The static IP remains allocated through routine reconnections.
[ ] The router supports appropriate NAT/firewall or routed-IP configuration.
[ ] The provider explains what happens to the address when changing plans or moving.

After activation, these commands can validate the externally visible IP and DNS resolution:

# Public IPv4 visible from your connection
curl -4 https://api.ipify.org

# Confirm DNS resolves to your address
dig +short A example.com

# Test a published HTTPS service
curl -I https://example.com

Test inbound connectivity using a different internet connection, such as mobile data. Testing only from inside the home network can produce misleading results because of router NAT loopback behavior.

A fixed IPv4 address is not a security control by itself. For any internet-facing server, use firewall rules, TLS, operating system patching and preferably VPN-based administrative access.

9. Common mistakes when choosing Japanese broadband

Mistake	Why it matters
Assuming 1 Gbps means 1 Gbps upload continuously	Advertised rates are technical maximums
Assuming IPv6 means dedicated IPv4	The protocols and address allocations are different
Choosing standard v6 Plus without fixed-IP support	Shared IPv4 connectivity may prevent inbound hosting
Comparing an ISP fee with an all-inclusive broadband bill	Separate NTT charges can exceed the ISP fee
Buying a generic Wi-Fi router	It may not support the provider’s fixed-IP tunnel mode
Assuming static IP permits commercial hosting	Acceptable-use terms still apply
Assuming one fixed IP can be transferred to a new provider	Address continuity across providers is usually not guaranteed

For most home labs, personal VPN access, NAS or several websites behind one reverse proxy, one static IPv4 address is sufficient. Multiple domains can point to that same address and be served using HTTPS hostname routing.

For business-critical public websites, however, a home fiber connection is not equivalent to a dedicated enterprise leased line with a bandwidth SLA, redundant routes and contractual restoration commitments.

10. Final recommendation by use case

Your situation	My preferred shortlist	Reason
New home broadband, lowest straightforward complete bill	en Hikari 1G	Bundled service and low static-IP fee
Existing standalone NTT FLET’S line	Interlink or GMO	Avoids changing the physical line
Want IPv4 over IPv6 without relying on traditional PPPoE	en Hikari, ASAHI Net, 21ip.jp	Published dedicated fixed-IP options
Want 10 Gbps-class residential broadband	en Hikari Cross	Competitive bundled price, subject to fixed-IP confirmation
Want a separate 10G ISP for FLET’S Cross	21ip.jp or Kamome	Explicit 10G fixed-IP products
Need only a fixed outward IP for allowlisting	Interlink MyIP	VPN approach may avoid broadband replacement

My choice for Tokyo

If I were choosing a new Tokyo home broadband connection primarily for a single fixed public IPv4 address, I would shortlist these two plans:

Choice	Monthly cost	Why choose it
Value: en Hikari 1G + fixed IP	¥4,290–¥5,390	More than sufficient for most home and development needs, subject to router and bandwidth checks.
High-speed: en Hikari Cross 10G + fixed IP	Potentially ¥5,687	Compelling 10 Gbps-class price if the provider confirms the fixed-IP configuration and suitable router.

I would not pay for corporate broadband simply to obtain a single static IP. The consumer-oriented offerings above establish that a dedicated fixed IPv4 can be purchased much more economically.

Before making the final decision, however, I would get written confirmation of three things: a truly dedicated fixed IPv4 address, inbound port availability, and permission for the intended hosting or VPN use.

11. Frequently asked questions

Can a foreign resident in Japan subscribe?

The researched providers advertise individual-customer services, but identification, accepted payment methods and any residence-status documentation must be confirmed with the provider. A corporate registration is not inherently necessary for the residential plans identified here.

Can I keep my current home broadband?

Potentially. If your connection is standalone NTT FLET’S, a separate ISP subscription may be possible. If it is Docomo Hikari or another optical-collaboration product, verify that a second ISP session is supported. Proprietary fiber networks require their own compatibility checks.

Is 100 Mbps or 1 Gbps enough for a small home server?

Often yes, but the decisive variables are sustained upload performance, request size, concurrent connections, latency and stability. A well-configured 1 Gbps-class connection can be more useful than a poorly configured 10G connection.

Can I host 20 websites with one static IP?

Yes, technically. Different domain names can use the same public address through an Nginx, Caddy or Traefik reverse proxy. ISP acceptable-use rules, server capacity, uplink reliability and security still need attention.

Will my static IP change when restarting the router?

Under a genuine static-IP service, routine reconnections should preserve the assigned IPv4. An address can still change under exceptional service migrations, provider transitions or contractual changes.

Can I use the same IP after moving house?

Do not assume so. Ask whether an address change or migration to another NTT service area requires reallocation.

12. Official provider resources

The following are the principal published provider references used in this study.

Research note: Service and static-IP prices were checked against publicly available provider pages. Address-specific availability, application approval, actual speeds and port policies cannot be guaranteed from public pricing pages alone. Some published rates are subject to revisions, equipment fees or promotional conditions.

Bottom line: en Hikari is my first recommendation for a fresh residential connection in Tokyo, with Interlink worth comparing if you already use standalone NTT FLET’S fiber. For a new 10 Gbps-class installation, en Hikari Cross is particularly interesting, provided its dedicated fixed IPv4 configuration is explicitly confirmed before purchase.

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