These entries are queried from radb.net using whois, you can try my project getting these.
:AS131980 route: 133.152.10.0/23 descr: DWANGO Co.,Ltd. origin: AS131980 notify: 2525noc-ext [at] dwango.co.jp mnt-by: MAINT-AS38634 changed: abe-sho [at] kadokawa.jp 20230414 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2404:ce00:ff00::/40 descr: DWANGO Co.,Ltd. origin: AS131980 notify: 2525noc-ext [at] dwango.co.jp mnt-by: MAINT-AS38634 changed: abe-sho [at] kadokawa.jp 20230414 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source