These entries are queried from radb.net using whois, you can try my project getting these.
:AS38629 route: 138.243.248.0/23 descr: OKN CIDR-block NO.2 origin: AS38629 notify: k.kitade [at] ntt.com mnt-by: MAINT-AS38629 changed: k.kitade [at] ntt.com 20230913 source: JPIRR rpki-ov-state: valid route: 138.243.248.0/24 descr: OKN CIDR-block NO.3 origin: AS38629 notify: k.kitade [at] ntt.com mnt-by: MAINT-AS38629 changed: k.kitade [at] ntt.com 20230913 source: JPIRR rpki-ov-state: valid route: 138.243.249.0/24 descr: OKN CIDR-block NO.4 origin: AS38629 notify: k.kitade [at] ntt.com mnt-by: MAINT-AS38629 changed: k.kitade [at] ntt.com 20230913 source: JPIRR rpki-ov-state: valid route: 138.243.250.0/23 descr: OKN CIDR-block NO.5 origin: AS38629 notify: k.kitade [at] ntt.com mnt-by: MAINT-AS38629 changed: k.kitade [at] ntt.com 20230913 source: JPIRR rpki-ov-state: valid route: 202.245.31.0/24 descr: OKN CIDR-block NO.1 origin: AS38629 notify: k.kitade [at] ntt.com mnt-by: MAINT-AS38629 changed: k.kitade [at] ntt.com 20230913 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route: 202.245.31.0/24 descr: N-BONE origin: AS38629 notify: noc [at] sphere.ad.jp mnt-by: MAINT-AS2514 changed: noc [at] sphere.ad.jp 20080327 source: NTTCOM rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:df0:43::/48 descr: NTT communications corporation origin: AS38629 notify: noc [at] ipboot.net mnt-by: MAINT-OKN changed: tanahasi [at] nttv6.jp 20220218 source: NTTCOM last-modified: 2022-02-18T10:03:45Z rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source route6: 2001:df0:43::/48 descr: OKN IPV6 CIDR-block NO.1 origin: AS38629 notify: k.kitade [at] ntt.com mnt-by: MAINT-AS38629 changed: k.kitade [at] ntt.com 20230913 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source