| ASN | Organisation | IPs |
|---|---|---|
| AS2497 | Internet Initiative Japan Inc. | 53,760 |
| AS2907 | Research Organization of Information and Systems National Institute of Informatics | 9,472 |
| AS131158 | Nara Institute of Science and Technology National University Corporation | 512 |
| AS23793 | National Institute of Advanced Industrial Science and Technology | 512 |
| AS37891 | JR Tokai Information Systems Company | 512 |
| AS2514 | NTT PC Communications Inc. | 256 |
| AS4680 | Mitsubishi Electric Information Network Corporation | 256 |
| AS7671 | NTT Smartconnect Corporation | 256 |