These entries are queried from radb.net using whois, you can try my project getting these.
:AS63776 route: 103.123.180.0/22 descr: Mercari, Inc. IPv4-ADDRESS-BLOCK-001 X-Keiro : alert-infra-nw [at] mercari.com origin: AS63776 notify: infra-nw-admin [at] mercari.com mnt-by: MAINT-AS63776 changed: infra-nw-admin [at] mercari.com 20230718 source: JPIRR rpki-ov-state: valid route: 103.123.183.0/24 descr: Mercari, Inc. CIDR-BLK-IPv4-4 X-Keiro : alert-infra-nw [at] mercari.com origin: AS63776 notify: infra-nw-admin [at] mercari.com mnt-by: MAINT-AS63776 changed: infra-nw-admin [at] mercari.com 20230718 source: JPIRR rpki-ov-state: valid route6: 2403:a640::/32 descr: Mercari,Inc. IPv6-ADDRESS-BLOCK-001 X-Keiro : alert-infra-nw [at] mercari.com origin: AS63776 notify: infra-nw-admin [at] mercari.com mnt-by: MAINT-AS63776 changed: infra-nw-admin [at] mercari.com 20230718 source: JPIRR rpki-ov-state: valid