These entries are queried from radb.net using whois, you can try my project getting these.
:AS-JAPAN-TELECOM as-set: AS-JAPAN-TELECOM descr: Japan Telecom Co.,Ltd. members: AS4722,AS4725,AS-WSIP,AS-ODN admin-c: Yoshihiro Koga tech-c: Yoshihiro Koga notify: gw.odn.ad.jp">as-admin [at] gw.odn.ad.jp mnt-by: MAINT-AS4722 changed: keisuke [at] gw.odn.ad.jp 20001017 source: RADB last-modified: 2023-11-13T15:39:32Z