I wonder if we can make the assumption that a suicide must have come from depression. Or at least, I'm not sure if the reasons/depressions experienced in Japan are comparable to other countries. I'd also agree that the admittance of mental illness may be lower than the actual. There are some pretty strange conditions out there, like hikikimori.
Right, I'm not saying that suicide necessarily comes exclusively from depression. Obviously there are other cultural factors at play in Japan that may lead to higher suicide rates. Just that the massive discrepancy between suicide rates and diagnosed depression rates is suggestive of the fact that the actual depression is at least somewhat higher than what we see.
