OK, so it seems Japanese and Korean collaborative programme is not on the cards.
Getting back to the picture. I suppose the blurring on the top could be anything - not necessarily an intake*.
The part near the front gear could be sensor related. But as this is a tech demo, it seems more likely they are focusing on proving the stealth aspects. Could this be a novel stealth technology? Plasma related?
Seems odd to draw attention to it in this way. Some normal red blanking covers would have raised fewer questions.
* they could be blurring out the second ejection triangle.
Courtney is no doubt right, but it does look like a two seater. Maybe its a two seater config with only one seat fitted to the proto.