These entries are queried from radb.net using whois, you can try my project getting these.
:AS45677 route: 103.251.116.0/22 descr: Isahaya Cable Television Co.,Inc. origin: AS45677 notify: support [at] icv-net.ne.jp mnt-by: MAINT-AS45677 changed: j.kawaguchi [at] ntt.com 20130828 source: NTTCOM rpki-ov-state: valid route: 103.251.116.0/22 descr: Isahaya Cable Media Co.,Ltd X-Keiro:networkalert [at] icv-net.co.jp origin: AS45677 notify: jpirr [at] icv-net.co.jp mnt-by: MAINT-AS45677 changed: d-hara [at] icv-net.co.jp 20220605 source: JPIRR rpki-ov-state: valid route: 180.148.184.0/21 descr: Isahaya Cable Television Co.,Inc. origin: AS45677 notify: support [at] icv-net.ne.jp mnt-by: MAINT-AS45677 changed: support [at] icv-net.ne.jp 20091015 source: NTTCOM rpki-ov-state: valid route: 180.148.184.0/21 descr: Isahaya Cable Media Co.,Ltd X-Keiro:networkalert [at] icv-net.co.jp origin: AS45677 notify: jpirr [at] icv-net.co.jp mnt-by: MAINT-AS45677 changed: d-hara [at] icv-net.co.jp 20220605 source: JPIRR rpki-ov-state: valid route: 180.148.192.0/20 descr: Isahaya Cable Media Co.,Ltd X-Keiro:networkalert [at] icv-net.co.jp origin: AS45677 notify: jpirr [at] icv-net.co.jp mnt-by: MAINT-AS45677 changed: d-hara [at] icv-net.co.jp 20220605 source: JPIRR rpki-ov-state: valid route: 180.148.192.0/20 descr: Isahaya Cable Television Co.,Inc. origin: AS45677 notify: support [at] icv-net.ne.jp mnt-by: MAINT-AS45677 changed: support [at] icv-net.ne.jp 20091015 source: NTTCOM rpki-ov-state: valid route: 192.92.248.0/21 descr: Isahaya Cable Media Co.,Ltd X-Keiro:networkalert [at] icv-net.co.jp origin: AS45677 notify: jpirr [at] icv-net.co.jp mnt-by: MAINT-AS45677 changed: d-hara [at] icv-net.co.jp 20220605 source: JPIRR rpki-ov-state: valid route: 192.92.248.0/21 descr: Isahaya Cable Television Co.,Inc. origin: AS45677 notify: support [at] icv-net.ne.jp mnt-by: MAINT-AS45677 changed: j.kawaguchi [at] ntt.com 20180123 source: NTTCOM rpki-ov-state: valid route6: 2407:8f00::/32 descr: Isahaya Cable Media Co.,Ltd X-keiro : networkalert [at] icv-net.co.jp origin: AS45677 notify: jpirr [at] icv-net.co.jp mnt-by: MAINT-AS45677 changed: k_tominaga [at] icv-net.co.jp 20240301 source: JPIRR rpki-ov-state: valid route6: 2407:8f00::/32 descr: Isahaya Cable Television Co.,Inc. origin: AS45677 notify: support [at] icv-net.ne.jp mnt-by: MAINT-AS45677 changed: j.kawaguchi [at] ntt.com 20130828 source: NTTCOM rpki-ov-state: valid