[Help] How do I use this Internet cable??

[Murakumo]

[Help! Just moved to a new apartment in Japan, and was told that I had free Internet in my room. So I checked the wall jack, but it's not a typical Cat4/Cat6 Ethernet socket?

It kinda looks like this:

What is this Internet cable in my apartment and how do I connect to it??

 

[Totally✮Crazy]

Hello! So, I was just passing through and stumbled upon your question, so cauz I was always wondering what this jack was about I finally took time to solve the mystery and help you with it, it is called Coax Wall plate and in your situation is used to connect with a modem

Hope this was useful :P