These entries are queried from radb.net using whois, you can try my project getting these.
:AS146977 route: 61.200.64.0/21 descr: Niikawa Portal origin: AS146977 notify: admin [at] int-gw.kddi.ne.jp mnt-by: MAINT-AS2516 changed: admin [at] int-gw.kddi.ne.jp 20220307 source: RADB last-modified: 2023-11-13T16:09:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 61.200.72.0/21 descr: Niikawa Portal origin: AS146977 notify: admin [at] int-gw.kddi.ne.jp mnt-by: MAINT-AS2516 changed: admin [at] int-gw.kddi.ne.jp 20220307 source: RADB last-modified: 2023-11-13T16:09:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 219.124.80.0/21 descr: Niikawa Portal origin: AS146977 notify: admin [at] int-gw.kddi.ne.jp mnt-by: MAINT-AS2516 changed: admin [at] int-gw.kddi.ne.jp 20220307 source: RADB last-modified: 2023-11-13T16:09:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 219.124.88.0/21 descr: Niikawa Portal origin: AS146977 notify: admin [at] int-gw.kddi.ne.jp mnt-by: MAINT-AS2516 changed: admin [at] int-gw.kddi.ne.jp 20220307 source: RADB last-modified: 2023-11-13T16:09:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source