These entries are queried from radb.net using whois, you can try my project getting these.
:AS55912 route: 103.15.39.0/24 descr: University of Kochi X-Keiro:kazama [at] cc.u-kochi.ac.jp,ikeda.kenichi [at] cc.u-kochi.ac.jp,i-info [at] cc.u-kochi.ac.jp origin: AS55912 notify: kazama [at] cc.u-kochi.ac.jp mnt-by: MAINT-AS55912 changed: ikeda.kenichi [at] cc.u-kochi.ac.jp 20230614 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 222.229.64.0/20 descr: KUT-NET origin: AS55912 notify: ppa [at] ml.kochi-tech.ac.jp mnt-by: MAINT-KUT changed: mori.akihiko [at] kochi-tech.ac.jp 20230401 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:df0:2f5::/48 descr: University of Kochi X-Keiro:kazama [at] cc.u-kochi.ac.jp,ikeda.kenichi [at] cc.u-kochi.ac.jp,i-info [at] cc.u-kochi.ac.jp origin: AS55912 notify: kazama [at] cc.u-kochi.ac.jp mnt-by: MAINT-AS55912 changed: ikeda.kenichi [at] cc.u-kochi.ac.jp 20230614 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2404:1b00::/32 descr: KUT-NET origin: AS55912 notify: ppa [at] ml.kochi-tech.ac.jp mnt-by: MAINT-KUT changed: fukutomi.eiji [at] kochi-tech.ac.jp 20240301 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source