It's very difficult to tell from this shot because of the lighting, even with the editing adjustment. Asian and Japanese Paradise Flycatchers are very similar, and the easiest way to tell from this angle would be the tones of the upperparts (bright rufous on Asian, darker with a maroon/purple tone on Japanese).
I think this bird is probably Asian because the tail seems quite bright and there is a lot of contrast in the tertials (between dark centres and pale fringes). But I am not entirely sure about the ID from this photo.
