Hello nusenu,
thanks for your mail. Please excuse my tardy reply.
Network : 133.175.0.0/16 Country : Japan Autonomous System : AS2519
Network : 49.242.192.0/18 Country : Japan Autonomous System : AS10013
Both AS lack an "aut-num" object in JPNIC, which is why there is no parseable information for them at hand in there. Not sure where RIPEstat gets their description from...
Anyways, ARIN, LACNIC and a better approach to missing data is on my list for next week. I'll see what we can to then.
Thanks, and best regards, Peter Müller