Indonesia on the other hand seems to have decided not to tell the world or their people how many cases there have been - when clearly they must have some by now.

I wouldn't put too much faith in the data coming out of Japan at the moment. People are being told to only report to doctors if they are showing serious symptoms associated with the illness. Japan has a "gaman" (perseverance) culture, so I'm worried a lot of cases are gonna be people sitting at home trying to power through what they think is just the run of the mill flu.