I think this is a Japanese Sparrowhawk. Although there is a mesial stripe, it is rather weak and can be present on a young Japanese. Also compare the bars on the tail, the light bar is thicker then the dark bar.
The question of heart shape is discussed in my talk. Do anyone have a photo of the heart sharp in Chinese Goshawk? I think the heart-sharp is at the flank, not at the center. I am not aware of Japanese having a similar pattern, but on this bird, the hearts are at the center of the belly. This would be an interesting point to have follow-up on.
HF Cheung
