Japan IP Address Lookup | Locate Japanese IPs
Need to trace a Japanese IP address? Japan runs some of the most advanced high-speed fiber networks in Asia. Using our free what is my IP lookup tool lets you pinpoint the prefecture, city, and carrier network behind any Japanese connection.
Interactive Japan IP Location Finder
Search for any IP address or domain to get instantly geolocated results.
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Your Detected IP Address
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Japan Internet Overview
Japan's internet infrastructure is built on extensive fiber-to-the-home (FTTH) rollouts. Most network routing flows through massive exchange hubs in Tokyo and Osaka. Because of this centralization, geolocation tools rely on detailed prefix mapping to distinguish between regional prefectures like Hokkaido, Kyoto, or Fukuoka.
Does Your IP Address Change?
Most home broadband and mobile connections in Japan get a dynamic public IP address, so it can change when your router reconnects or your provider reassigns it. Many mobile networks also put customers behind carrier-grade NAT, where one public address is shared. Static addresses are usually a paid business option.
Japan Network Facts
IPv6 Adoption
See live data
Regional Internet Registry
APNIC
IPv6 adoption changes month to month, so we don't quote a fixed number. See Google's per-country IPv6 statistics for the current figure. IP addresses in Japan are allocated by APNIC (with JPNIC as Japan's national registry).
Major ISPs in Japan
- 1NTT Communications
- 2KDDI (au)
- 3SoftBank
- 4So-net (Sony)
- 5BIGLOBE
Top Hosting Providers
- 1Sakura Internet
- 2ConoHa
- 3GMO Internet
- 4Lolipop!
- 5AWS Tokyo
Japan IP Address Space in Numbers
As of 25 September 2026, the regional internet registries list 188.7 million IPv4 addresses (188,701,760) as delegated to 1,210 organisations in Japan: 5.12% of all delegated IPv4 space, the 3rd-largest share of any country. Organisations there also hold 786 IPv6 blocks and 1,302 autonomous system numbers (ASNs).
IPv4 addresses registered
188.7 million
Share of world IPv4
5.12% (#3)
IPv6 blocks
786
AS numbers (ASNs)
1,302
Networks with the most IPv4 addresses in Japan
The five networks with the most IPv4 addresses in Japan hold 48.4% of the 203.5 million addresses that geolocate there, out of 1,547 networks in total.
- AS17676 · SoftBank Corp.18.4%
- AS4713 · NTT Communications Corporation14.1%
- AS2516 · KDDI CORPORATION8.9%
- AS2907 · Research Organization of Information and Systems, National Institute of Informa4.3%
- AS16509 · Amazon.com, Inc.2.7%
Check any network's details with our ASN lookup.
Where those addresses geolocate
Share of Japan's geolocated IPv4 addresses by city.
- Chiyoda, Tokyo46.1%
- Minato, Tokyo21.7%
- Osaka9.6%
- Shibuya, Tokyo5%
- Shinjuku, Tokyo1.5%
How to read these numbers
The registry figures count addresses delegated to organisations based in Japan. The network and city figures count the 203.5 millionIPv4 addresses that geolocate there, which is why the two totals differ. Large address blocks usually geolocate to the owner's headquarters or data centres, so a city's share reflects where networks are registered and hosted, not how many people are online there. Some big holders, such as government, university or corporate networks, are not consumer ISPs at all.
Registries, exchanges and privacy rules in Japan
- Country domain
- .jp is run by JPRS (Japan Registry Services).
- IP address registry
- APNIC allocates addresses in Japan, with JPNIC as Japan’s national internet registry.
- Main internet exchange points
- JPNAP, JPIX and BBIX. Networks exchange traffic directly here instead of through distant transit providers.
- Privacy law
- Act on the Protection of Personal Information (APPI). The regulator is the Personal Information Protection Commission (PPC).
Sources: NRO combined RIR delegation statistics, file dated 25 September 2026; DB-IP IP to City Lite and IP to ASN Lite (2026-09) (CC BY 4.0). Network and city shares are IP Dekho's analysis of the DB-IP data (IPv4 only), updated monthly.
IPv6 Transition & Adoption
Next Generation Protocol Deployment
Japan has strong IPv6 adoption. This migration was heavily driven by the NTT Next Generation NGN network, which uses IPv6 natively. Read more in our guide on how DNS resolution works. Japanese users often use technologies like IPoE to bypass old IPv4 congestion points.
How to Use the Location Finder
Input the Japanese IP address or domain name into the lookup field above. The search tool will display the prefecture, city, service provider, ASN, and map coordinates. Leave the field blank to check your own current connection, or run a DNS security test.
Submit IP/Domain
Type any valid IP or site domain in the input above.
Verify Details
Analyze ISP, geolocation state/city, coordinates and timezone records.
Audit Network
Utilize the returned metrics to troubleshoot latency or perform compliance checks.
Benefits of Japan IP Lookup
- Show Japanese character sets and pricing in Japanese Yen (JPY) automatically and see what DNSSEC is.
- Identify whether a connection routes through Tokyo or Osaka exchanges and understand TLS 1.3 protocol improvements.
- Confirm that sites collecting personal data from Japanese users encrypt it in transit, one of the security measures expected under the APPI, with our SSL checker.
- Prevent suspicious logins from outside Japan on localized platforms.
Common Use Cases
Gaming servers assigning players to Japanese nodes to ensure low latency.
OTT media systems checking user location to manage regional licensing for anime.
E-commerce stores localizing shopping carts and displaying JPY currency.
IT security systems blocking malicious IPs trying to access Japanese industrial networks.
Frequently Asked Questions
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Integrate IP Geolocation Anywhere
Need to geolocate visitors at scale? We're building a developer API for IP geolocation, ISP, and network data. In the meantime, the lookup tool above is free to use.
