These entries are queried from radb.net using whois, you can try my project getting these.
:AS17932 route: 150.65.0.0/16 descr: Japan Advanced Institute of Science and Technology X-Keiro : isc [at] ml.jaist.ac.jp origin: AS17932 notify: isc [at] ml.jaist.ac.jp mnt-by: MAINT-AS17932 changed: zin [at] jaist.ac.jp 20231101 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 150.65.0.0/16 descr: Japan Advanced Institute of Science and Technology origin: AS17932 mnt-by: MAINT-AS2500 changed: kato [at] wide.ad.jp 20020127 source: RADB last-modified: 2023-11-13T15:39:33Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.50.109.0/24 descr: Japan Advanced Institute of Science and Technology origin: AS17932 mnt-by: MAINT-AS2907 changed: as2907 [at] sinet.ad.jp 20231002 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 192.50.109.0/24 descr: Japan Advanced Institute of Science and Technology origin: AS17932 mnt-by: MAINT-AS7684 changed: s-kinoshita [at] sakura.ad.jp 20100819 source: RADB last-modified: 2023-11-13T15:41:00Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:df0:2ed::/48 descr: Japan Advanced Institute of Science and Technology X-Keiro : isc [at] ml.jaist.ac.jp origin: AS17932 notify: isc [at] ml.jaist.ac.jp mnt-by: MAINT-AS17932 changed: zin [at] jaist.ac.jp 20231101 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source