Hi John,
Thanks for the comments.
"the prominent gular stripe should eliminate Japanese Sparrowhawk"
this I didn't know and would be quite useful for seperation.
Crested Goshawks usually have a very distinctive shape in flight so in general I think they are easier to recognize. But I can't say I feel very comfortable with Japanese/Chinese/Eurasian Sparrowhawk/Besra at a distance and unfortunately we usually don't see accipiters for very long.
Brendan