These entries are queried from radb.net using whois, you can try my project getting these.
:AS137008 route: 202.53.152.0/24 origin: AS137008 descr: Route Object for Advertised IPV4 Network descr: Tokyo, Japan descr: OPENTEXT CORPORATION mnt-by: MAINT-GII-GXS-HK last-modified: 2018-04-04T15:30:46Z country: JP source: APNIC rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source