This is about a TV program I watched today, and my feelings about it.(I wasn't sure if you had intended to make this into a full sentence or not, but I corrected it anyways)

I had been watching a TV program until just a few minutes ago. The content is was that other countriey's(to make a word possesive you just add " 's " to the unchanged noun) singers sing J-POP. I was moved to tears by it. I realized many other countriey's people love Japan for the first time. I thought the songs they sang must be unsurpassed!! I had have a more fresh incentive afresh(although not technically wrong it sounds better this way). Definitely, definitely, definitely, definitely I will go to Finland to study, work, and live!!

This is about a TV program I watched today and my feeling about it.

I had been watching a TV program until just a few minutes ago. The content was that other country's singers sing J-POP. I was moved to tears by it. I realized, for the first time, that many other country's people love Japan. I thought the songs they sang must be unsurpassed!! I now have a more fresh incentive. Definately, definately, definately, definately, I will go to Finland to study, work and live!!

Well written :) Not too many errors.

And of course! Japan is a very unique and interesting country! There is no wonder why people would love to learn about it :D