These entries are queried from radb.net using whois, you can try my project getting these.
:AS131897 route: 133.71.0.0/16 descr: National University Corporation ,Ehime University IPv4 Address. origin: AS131897 admin-c: MM9738JP tech-c: MM9738JP tech-c: MK12533JP notify: shibata [at] e-catv.ne.jp notify: kayawake [at] foresightwave.ne mnt-by: MAINT-AS23929 changed: kayawake [at] foresightwave.net 20140814 #22:57:42Z source: RADB last-modified: 2023-11-13T15:46:37Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source