These entries are queried from radb.net using whois, you can try my project getting these.
:AS63778 route6: 2401:7641::/32 descr: BGPNAP2-IPv6-32CIDR-A X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641::/33 descr: BGPNAP2-IPv6-33CIDR-A X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641:8000::/33 descr: BGPNAP2-IPv6-33CIDR-B X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641::/34 descr: BGPNAP2-IPv6-34CIDR-A X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641:4000::/34 descr: BGPNAP2-IPv6-34CIDR-B X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641:8000::/34 descr: BGPNAP2-IPv6-34CIDR-C X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641:c000::/34 descr: BGPNAP2-IPv6-34CIDR-D X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641::/35 descr: BGPNAP2-IPv6-35CIDR-A X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641:2000::/35 descr: BGPNAP2-IPv6-35CIDR-B X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641:4000::/35 descr: BGPNAP2-IPv6-35CIDR-C X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641:6000::/35 descr: BGPNAP2-IPv6-35CIDR-D X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641:8000::/35 descr: BGPNAP2-IPv6-35CIDR-E X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641:a000::/35 descr: BGPNAP2-IPv6-35CIDR-F X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641:c000::/35 descr: BGPNAP2-IPv6-35CIDR-G X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641:e000::/35 descr: BGPNAP2-IPv6-35CIDR-H X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641::/36 descr: BGPNAP2-IPv6-36CIDR-A X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641:1000::/36 descr: BGPNAP2-IPv6-36CIDR-B X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641:2000::/36 descr: BGPNAP2-IPv6-36CIDR-C X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641:3000::/36 descr: BGPNAP2-IPv6-36CIDR-D X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641:4000::/36 descr: BGPNAP2-IPv6-36CIDR-E X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641:5000::/36 descr: BGPNAP2-IPv6-36CIDR-F X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641:6000::/36 descr: BGPNAP2-IPv6-36CIDR-G X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641:7000::/36 descr: BGPNAP2-IPv6-36CIDR-H X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641:8000::/36 descr: BGPNAP2-IPv6-36CIDR-I X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641:9000::/36 descr: BGPNAP2-IPv6-36CIDR-J X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641:a000::/36 descr: BGPNAP2-IPv6-36CIDR-K X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641:b000::/36 descr: BGPNAP2-IPv6-36CIDR-L X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641:c000::/36 descr: BGPNAP2-IPv6-36CIDR-M X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641:d000::/36 descr: BGPNAP2-IPv6-36CIDR-N X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641:e000::/36 descr: BGPNAP2-IPv6-36CIDR-O X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR route6: 2401:7641:f000::/36 descr: BGPNAP2-IPv6-36CIDR-P X-Keiro: noc [at] bgp.ad.jp origin: AS63778 notify: noc [at] bgp.ad.jp mnt-by: MAINT-AS63771 changed: noc [at] bgp.ad.jp 20200726 source: JPIRR