IP Lookup Japan
Find location, ISP, ASN, and network details for IP addresses registered in Japan (JP) under APNIC.
Use the IP lookup tool to enter any IP address and check if it is registered in Japan. Our tool provides real-time geolocation data, ISP details, ASN, and VPN/proxy detection.
Open IP Lookup ToolInternet Infrastructure in Japan
Japan (JP) has its IP address space managed by APNIC — the Regional Internet Registry responsible for IP allocation in this region. IP address blocks are allocated to ISPs, hosting providers, enterprises, and government networks operating within Japan.
120M+ users, ~96% penetration
Strong IPv6 adoption on fiber (FTTH); NTT's NGN network is mostly dual-stack
MIC (Ministry of Internal Affairs and Communications) oversees telecom; JPNIC manages Japan's IP address registry
Japan has one of the world's highest fiber-to-the-home (FTTH) penetration rates; most residential IPs belong to NTT's gigabit fiber infrastructure.
Major ISPs in Japan
The following Internet Service Providers hold IP address allocations from APNIC and operate networks within Japan. When you look up an IP registered in Japan, the ISP field will typically show one of these operators or a regional subsidiary.
What IP Data Is Available for Japan?
Confirms if the IP is registered in Japan (JP) under APNIC.
Province, state, or administrative region within Japan.
Approximate city location for the IP block (50–80% accuracy for most ISPs).
The internet service provider operating the IP in Japan — one of: NTT Communications, SoftBank, KDDI/au, and others.
Autonomous System Number identifying the network operator in Japan's BGP routing table.
Whether the IP is a VPN server, proxy, or anonymization service operating in or through Japan.
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Frequently Asked Questions
How do I find an IP address location in Japan?
Use our IP lookup tool to enter any IP address and instantly get its location in Japan. Our tool uses MaxMind GeoLite2 data to provide country, region, city, ISP, and ASN details for IPs registered in Japan under the APNIC registry.
Which ISPs operate in Japan?
Japan's major Internet Service Providers include: NTT Communications, SoftBank, KDDI/au, IIJ (Internet Initiative Japan), OCN, So-net. These ISPs are allocated IP address blocks by APNIC (the Regional Internet Registry for Japan). Enter any IP from Japan in our lookup tool to identify its specific ISP and ASN.
What is Japan's Regional Internet Registry (RIR)?
IP address blocks in Japan are managed by APNIC. The RIR allocates IP ranges to Japan's ISPs, hosting providers, government networks, and enterprises. Each allocated block is registered with the ASN of the operator in the global BGP routing table.
How accurate is IP geolocation for Japan?
Country-level geolocation for Japan IPs is typically 95–99% accurate. City-level accuracy in Japan ranges from 50–80% depending on the ISP. Fiber and fixed-line ISPs in Japan tend to have better city-level accuracy than mobile networks.
What is IPv6 adoption like in Japan?
Strong IPv6 adoption on fiber (FTTH); NTT's NGN network is mostly dual-stack
Can I find the exact address of an IP in Japan?
No — IP geolocation provides city or region-level data for Japan IPs, not street addresses. MIC (Ministry of Internal Affairs and Communications) oversees telecom; JPNIC manages Japan's IP address registry. Only law enforcement with proper legal authorization can request subscriber information from Japan's ISPs.
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