Japan
Top organizations
| Organization | IPs | Ranges |
|---|---|---|
| SoftBank Corp. | 40.44M | 281 |
| NTT DOCOMO BUSINESS, Inc. | 28.64M | 194 |
| KDDI CORPORATION | 18.07M | 231 |
| Research Organization of Information and Systems, National Institute of Informatics | 8.77M | 477 |
| Amazon.com, Inc. | 7.90M | 143 |
| ARTERIA Networks Corporation | 6.85M | 193 |
| JCOM Co., Ltd. | 6.73M | 171 |
| Internet Initiative Japan Inc. | 4.08M | 217 |
| Sony Network Communications Inc. | 3.87M | 74 |
| BIGLOBE Inc. | 3.67M | 30 |
| Microsoft Corporation | 3.25M | 31 |
| OPTAGE Inc. | 3.00M | 59 |
| NTT DOCOMO, INC. | 2.54M | 342 |
| NTT PC Communications, Inc. | 2.08M | 138 |
| FreeBit Co.,Ltd. | 1.94M | 305 |
| Fujitsu Limited. | 1.63M | 355 |
| NTT-ME Corporation | 1.51M | 29 |
| Chubu Telecommunications Company, Inc. | 1.51M | 45 |
| TOKAI Communications Corporation | 1.50M | 113 |
| Asahi Net | 1.28M | 60 |
| IDC Frontier Inc. | 1.04M | 147 |
| SAKURA Internet Inc. | 1.01M | 168 |
| QTnet,Inc. | 760.8K | 35 |
| NTT America, Inc. | 670.2K | 165 |
| Eli Lilly and Company | 655.4K | 6 |
Top ASNs
| ASN | Name | IPs |
|---|---|---|
| AS17676 | SoftBank Corp. | 38.51M |
| AS4713 | NTT DOCOMO BUSINESS,Inc. | 28.62M |
| AS2516 | KDDI CORPORATION | 18.07M |
| AS2907 | Research Organization of Information and Systems, National Institute of Informatics | 8.77M |
| AS16509 | Amazon.com, Inc. | 7.90M |
| AS17506 | ARTERIA Networks Corporation | 5.38M |
| AS9824 | JCOM Co., Ltd. | 4.75M |
| AS2497 | Internet Initiative Japan Inc. | 4.08M |
| AS2527 | Sony Network Communications Inc. | 3.87M |
| AS2518 | BIGLOBE Inc. | 3.67M |
| AS8075 | Microsoft Corporation | 3.23M |
| AS17511 | OPTAGE Inc. | 2.99M |
| AS9605 | NTT DOCOMO, INC. | 2.54M |
| AS2514 | NTT PC Communications, Inc. | 2.08M |
| AS10013 | FreeBit Co.,Ltd. | 1.94M |
| AS4725 | SoftBank Corp. | 1.92M |
| AS9595 | NTT-ME Corporation | 1.51M |
| AS18126 | Chubu Telecommunications Company, Inc. | 1.51M |
| AS10010 | TOKAI Communications Corporation | 1.50M |
| AS2510 | FUJITSU LIMITED | 1.49M |
| AS2519 | ARTERIA Networks Corporation | 1.46M |
| AS4685 | Asahi Net | 1.28M |
| AS9617 | JCOM Co., Ltd. | 1.16M |
| AS4694 | IDC Frontier Inc. | 1.04M |
| AS7679 | QTnet,Inc. | 760.8K |
Regions / states / provinces
Network composition
How Japan's allocated IPv4 space breaks down by operator type, regional registry, and block size.
| Category | IPv4 | Share |
|---|---|---|
| ISP / Telecom | 70.30M |
47.9%
|
| Enterprise | 56.93M |
38.8%
|
| Academic / Research | 12.50M |
8.5%
|
| Mobile | 6.85M |
4.7%
|
| Hosting / Cloud | 104.7K |
0.1%
|
| Government | 15.1K |
0.0%
|
| CDN | 13.3K |
0.0%
|
| Registry | IPv4 | Share |
|---|---|---|
| APNIC | 189.36M |
94.7%
|
| ARIN | 9.33M |
4.7%
|
| RIPE NCC | 1.15M |
0.6%
|
| AFRINIC | 65.8K |
0.0%
|
| LACNIC | 13.3K |
0.0%
|
Routing & security
Live BGP routing footprint for Japan from our global collectors, with RPKI route-origin validation coverage.
RPKI-valid % = announced prefixes with a matching Route Origin Authorization. Live routing →
Web3 footprint
Japan hosts 1,095 observed decentralized-network nodes across 10 networks. It’s a neutral signal — it does not affect the reputation score. See the full web3 node map.
Reverse-DNS, threat intelligence & internet health
How much of Japan's address space resolves to a hostname, how much appears on public threat blocklists, how widely the population is online, and independent signals of censorship and outages.
Reverse-DNS + threat-blocklist footprint from our own scanning & 8 threat-intel feeds. Internet adoption from the World Bank; censorship measurements from OONI; outage detection from IODA / Georgia Tech; connection speed from Cloudflare Radar.
Frequently Asked Questions
How many IPv4 addresses are allocated to Japan?
Japan has 199,963,014 IPv4 addresses allocated across 12,441 network ranges. These allocations are managed by regional internet registries and assigned to organizations operating within the country.
What are the largest internet providers in Japan?
The top organizations in Japan by IP allocation include the major ISPs, hosting providers, and enterprises listed above. These 50 organizations collectively manage the majority of the country's IPv4 address space.
How many ASNs operate in Japan?
Japan has 50 or more registered Autonomous Systems. Each ASN represents an independently routed network, such as an ISP, cloud provider, or enterprise network.
What continent is Japan in?
Japan is located in Asia. IP address allocations in this region are managed by APNIC.
