IP address ranges in Japan
Japan holds 223,774 IPv4 segments in the IP99 geolocation database, covering 199,944,989 addresses. In the 7 days to 27 October 2026 we newly captured 78,677 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 | 7,632 | 37.6% |
| Datacenter | 5,275 | 26.0% |
| Gateway / NAT egress | 3,975 | 19.6% |
| Mobile network | 1,716 | 8.5% |
| Education network | 1,016 | 5.0% |
| Organisation | 493 | 2.4% |
| Government | 123 | 0.6% |
| CDN node | 70 | 0.3% |
Regions
| Region | Segments | Share |
|---|---|---|
| Tokyo | 57,850 | 25.9% |
| Ōsaka | 21,579 | 9.6% |
| Kanagawa | 17,223 | 7.7% |
| Chiba | 13,300 | 5.9% |
| Saitama | 12,838 | 5.7% |
| Aichi | 9,676 | 4.3% |
| Hyōgo | 7,954 | 3.6% |
| Hokkaido | 5,996 | 2.7% |
| Shizuoka | 5,877 | 2.6% |
| Fukuoka | 5,635 | 2.5% |
| Ibaraki | 5,120 | 2.3% |
| Hiroshima | 3,479 | 1.6% |
| Gunma | 3,464 | 1.5% |
| Kyoto | 3,418 | 1.5% |
| Nagano | 3,082 | 1.4% |
| Miyagi | 2,949 | 1.3% |
| Tochigi | 2,662 | 1.2% |
| Niigata | 2,293 | 1.0% |
| Fukushima | 2,284 | 1.0% |
| Okayama | 2,249 | 1.0% |
| Gifu | 2,212 | 1.0% |
| Nara | 2,164 | 1.0% |
| Mie | 2,110 | 0.9% |
| Shiga | 2,090 | 0.9% |
| Aomori | 1,525 | 0.7% |
| Okinawa | 1,525 | 0.7% |
| Yamaguchi | 1,475 | 0.7% |
| Ehime | 1,451 | 0.6% |
| Wakayama | 1,450 | 0.6% |
| Yamanashi | 1,424 | 0.6% |
| Yamagata | 1,403 | 0.6% |
| Kumamoto | 1,379 | 0.6% |
| Iwate | 1,377 | 0.6% |
| Toyama | 1,183 | 0.5% |
| Kagawa | 1,182 | 0.5% |
| Nagasaki | 1,180 | 0.5% |
| Ishikawa | 1,137 | 0.5% |
| Kagoshima | 1,120 | 0.5% |
| Oita | 1,015 | 0.5% |
| Miyazaki | 972 | 0.4% |
Cities
| City | Segments | Share |
|---|---|---|
| Tokyo | 50,320 | 22.5% |
| Osaka | 14,919 | 6.7% |
| Yokohama | 9,818 | 4.4% |
| Nagoya | 4,744 | 2.1% |
| Saitama | 4,442 | 2.0% |
| Sapporo | 4,192 | 1.9% |
| Chiba | 3,959 | 1.8% |
| Kobe | 3,885 | 1.7% |
| Fukuoka | 3,413 | 1.5% |
| Kawasaki | 3,340 | 1.5% |
| Kyoto | 2,825 | 1.3% |
| Matsudo | 2,527 | 1.1% |
| Sendai | 2,338 | 1.0% |
| Hiroshima | 2,196 | 1.0% |
| Hamamatsu | 1,632 | 0.7% |
| Kawaguchi | 1,559 | 0.7% |
| Shizuoka | 1,439 | 0.6% |
| Sakai | 1,391 | 0.6% |
| Urayasu | 1,250 | 0.6% |
| Niigata | 1,247 | 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 | 59,330 |
| AS17676 | 32,446 |
| AS2516 | 27,768 |
| AS17506 | 10,071 |
| AS2527 | 9,245 |
| AS2518 | 7,171 |
| AS2907 | 6,886 |
| AS9824 | 5,957 |
| AS2497 | 5,071 |
| AS17511 | 4,956 |
Look up a single address
Free, no signup: curl https://ip99.com/v1/ip/8.8.8.8 — see the API documentation.
Go deeper
What is my IP address? · How IP location works, and how accurate it is · What an IP address lookup can and cannot tell you