These entries are queried from radb.net using whois, you can try my project getting these.
:AS23628 route: 202.220.224.0/19 descr: Academic newtown Community Cable Service origin: AS23628 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20230801 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 202.220.224.0/19 descr: Academic newtown Community Cable Service origin: AS23628 notify: accscom [at] accs.or.jp mnt-by: MAINT-AS23628 changed: yuko.kanai [at] ntt.com 20030509 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 202.220.224.0/19 descr: Academic newtown Community Cable Service origin: AS23628 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20140430 source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.235.48.0/20 descr: Academic newtown Community Cable Service origin: AS23628 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20230801 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.235.48.0/20 descr: Academic newtown Community Cable Service origin: AS23628 notify: accscom [at] accs.or.jp mnt-by: MAINT-AS23628 changed: yasuyuki.hamada [at] ntt.com 20030715 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 210.235.48.0/20 descr: Academic newtown Community Cable Service origin: AS23628 mnt-by: MAINT-AS7684 changed: peer [at] sakura.ad.jp 20140430 source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source