IP address ranges in Japan
Japan holds 226,375 IPv4 segments in the IP99 geolocation database, covering 199,927,432 addresses. In the 4 days to 12 September 2026 we newly captured 28,692 proxy-type addresses there.
Network usage types
The ratio of residential broadband to datacenter address space is the most direct indicator of what kind of proxy risk a region carries: a high datacenter share means datacenter proxies are more likely; a high residential share means home-broadband proxies and dial-up pools are.
| Usage type | Segments | Share |
|---|---|---|
| Residential broadband | 7,638 | 37.6% |
| Datacenter | 5,291 | 26.0% |
| Gateway / NAT egress | 3,959 | 19.5% |
| Mobile network | 1,714 | 8.4% |
| Education network | 1,022 | 5.0% |
| Organisation | 494 | 2.4% |
| Government | 123 | 0.6% |
| CDN node | 71 | 0.3% |
Regions
| Region | Segments | Share |
|---|---|---|
| Tokyo | 60,949 | 26.9% |
| Osaka | 22,220 | 9.8% |
| Kanagawa | 17,055 | 7.5% |
| Chiba | 13,848 | 6.1% |
| Saitama | 13,683 | 6.0% |
| Aichi | 10,505 | 4.6% |
| Hyōgo | 7,385 | 3.3% |
| Shizuoka | 6,317 | 2.8% |
| Hokkaido | 5,978 | 2.6% |
| Fukuoka | 5,512 | 2.4% |
| Ibaraki | 4,793 | 2.1% |
| Gunma | 3,314 | 1.5% |
| Kyoto | 3,117 | 1.4% |
| Nagano | 3,092 | 1.4% |
| Hiroshima | 3,038 | 1.3% |
| Miyagi | 2,854 | 1.3% |
| Tochigi | 2,735 | 1.2% |
| Niigata | 2,324 | 1.0% |
| Fukushima | 2,253 | 1.0% |
| Nara | 2,222 | 1.0% |
| Okayama | 2,140 | 0.9% |
| Mie | 2,058 | 0.9% |
| Gifu | 2,057 | 0.9% |
| Shiga | 2,025 | 0.9% |
| Okinawa | 1,552 | 0.7% |
| Aomori | 1,498 | 0.7% |
| Yamaguchi | 1,397 | 0.6% |
| Yamagata | 1,379 | 0.6% |
| Ehime | 1,377 | 0.6% |
| Yamanashi | 1,370 | 0.6% |
| Kumamoto | 1,351 | 0.6% |
| Iwate | 1,330 | 0.6% |
| Wakayama | 1,310 | 0.6% |
| Toyama | 1,147 | 0.5% |
| Ishikawa | 1,101 | 0.5% |
| Kagawa | 1,055 | 0.5% |
| Kagoshima | 1,019 | 0.5% |
| Nagasaki | 963 | 0.4% |
| Oita | 951 | 0.4% |
| Miyazaki | 913 | 0.4% |
Cities
| City | Segments | Share |
|---|---|---|
| Tokyo | 41,894 | 18.5% |
| Osaka | 16,063 | 7.1% |
| Asagaya-minami | 10,491 | 4.6% |
| Yokohama | 9,595 | 4.2% |
| Nagoya | 5,935 | 2.6% |
| Saitama | 4,474 | 2.0% |
| Sapporo | 4,017 | 1.8% |
| Chiba | 3,984 | 1.8% |
| Kobe | 3,440 | 1.5% |
| Fukuoka | 3,300 | 1.5% |
| Kawasaki | 3,197 | 1.4% |
| Matsudo | 2,895 | 1.3% |
| Kyoto | 2,528 | 1.1% |
| Sendai | 2,289 | 1.0% |
| Kawaguchi | 2,130 | 0.9% |
| Hiroshima | 1,848 | 0.8% |
| Urayasu | 1,558 | 0.7% |
| Hamamatsu | 1,520 | 0.7% |
| Sakai | 1,433 | 0.6% |
| Shizuoka | 1,321 | 0.6% |
Autonomous systems
An ASN identifies the operator of a network. Addresses under one ASN usually share risk characteristics, which is why risk controls often act on whole ASNs rather than single addresses. Operator names are not published here — the machine-readable identity is the ASN.
| ASN | Segments |
|---|---|
| AS4713 | 60,392 |
| AS17676 | 32,538 |
| AS2516 | 27,911 |
| AS17506 | 9,816 |
| AS2527 | 9,081 |
| AS2518 | 7,305 |
| AS9824 | 6,657 |
| AS2907 | 6,200 |
| AS2497 | 5,086 |
| AS17511 | 5,085 |
Look up a single address
Free, no signup: curl https://ip99.com/v1/ip/8.8.8.8 — see the API documentation.