These entries are queried from radb.net using whois, you can try my project getting these.
:AS17510 route: 133.158.0.0/16 descr: INFORMATION SERVICES INTERNATIONAL - DENTSU, LTD. X-Keiro:g-sos-net-pub [at] group.isid.co.jp origin: AS17510 notify: g-sos-net-pub [at] group.isid.co.jp mnt-by: MAINT-AS17510 changed: irr-admin [at] nic.ad.jp 20090413 changed: misa [at] isid.co.jp 20100316 changed: iwasawa.moriaki [at] isid-ao.co.jp 20110228 changed: xkikura.shingo [at] contract.isid.co.jp 20111121 changed: iwasawa.moriaki [at] isid-ao.co.jp 20120105 changed: iwasawa.moriaki [at] isid-ao.co.jp 20130115 changed: xishihara.takashi [at] contract.isid.co.jp 20140128 changed: xshibano.chihiro [at] contract.isid.co.jp 20150113 changed: xueda.mie [at] contract.isid.co.jp 20160119 changed: xhattori.nobutoshi [at] contract.isid.co.jp 20170105 changed: xsato.shingo [at] contract.isid.co.jp 20171227 changed: xkato.masami [at] contract.isid.co.jp 20181217 changed: xito.shun [at] contract.isid.co.jp 20191213 changed: xito.shun [at] contract.isid.co.jp 20201125 changed: xinoue.hiroshi [at] contract.isid.co.jp 20211224 changed: kawai.kotaro [at] isid-ao.co.jp 20221219 changed: xinoue.hiroshi [at] contract.isid.co.jp 20231215 source: JPIRR rpki-ov-state: not_found # No ROAs found, or RPKI validation not enabled for source