These entries are queried from radb.net using whois, you can try my project getting these.
:AS45688 route: 133.69.160.0/19 descr: Engineering School, The University of Tokyo. X-Keiro : noc [at] nakao-lab.org origin: AS45688 notify: noc [at] nakao-lab.org mnt-by: MAINT-AS2523 changed: kotani [at] media.kyoto-u.ac.jp 20230601 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source