These entries are queried from radb.net using whois, you can try my project getting these.
:AS140868 route6: 2001:df4:1781::/48 origin: AS140868 descr: Ayao Takata Ishibashi 147 mnt-by: MAINT-SDCC-JP last-modified: 2024-03-22T19:34:46Z source: APNIC rpki-ov-state: valid route6: 2001:df4:1781::/48 descr: ShimaneDatacenterClubCustomerRoute X-Keiro:thinnw.jpirr-alert [at] mail1.softether.co.jp origin: AS140868 notify: thinnw.jpirr-notify [at] mail1.softether.co.jp mnt-by: MAINT-AS150363 changed: irr-admin [at] nic.ad.jp 20231207 source: JPIRR rpki-ov-state: valid route6: 2406:7ec0:1004::/48 origin: AS140868 descr: AS140868 IPv6 Only Network mnt-by: MAINT-SDCC-JP last-modified: 2023-12-16T16:55:56Z source: APNIC rpki-ov-state: valid route6: 2406:7ec0:1004::/48 descr: ShimaneDatacenterClubCustomerRoute X-Keiro:thinnw.jpirr-alert [at] mail1.softether.co.jp origin: AS140868 notify: thinnw.jpirr-notify [at] mail1.softether.co.jp mnt-by: MAINT-AS150363 changed: irr-admin [at] nic.ad.jp 20231207 source: JPIRR rpki-ov-state: valid