These entries are queried from radb.net using whois, you can try my project getting these.
:AS59091 route: 163.138.192.0/19 descr: KAIT-NWLAB origin: AS59091 mnt-by: MAINT-AS59091 changed: maruyama [at] nw.kanagawa-it.ac.jp 20140430 #09:50:09Z source: RADB last-modified: 2023-11-13T15:46:19Z rpki-ov-state: valid route: 163.138.192.0/19 origin: AS59091 descr: Nippon Telegraph and Telephone Corporation 3-9-11 Midori-cho Musashino-shi mnt-by: MAINT-JP-NTTECL-JP last-modified: 2023-06-27T11:17:57Z source: APNIC rpki-ov-state: valid