Japanese suicide rate while high isn't an outlier. It's just 10% higher than in Belgium, and nobody ever talks about causes of suicide among Belgians. There are even countries like Lithuania with suicide rate 60% higher than Japan.
Very interesting that China is the only country (that I noticed) where women have a higher suicide rate than men. In the Slavic countries men kill themselves ~5 times more often.
(From the "humans are crazy" and "truth is stranger than fiction" departments...)
Want to be happy? Try eating dirt... or at least dirty plants.
Seriously.
From an article in Discover magazine, "Is Dirt The New Prozac?":
Given the way the industry works, we'll probably either see drugs, or somebody will patent the bacteria. But that's sort of secondary. The real point is that to the extent our current environment doesn't match our ancestral one, there are likely to be "bugs", no pun intended.
(The original study: “Identification of an Immune-Responsive Mesolimbocortical Serotonergic System: Potential Role in Regulation of Emotional Behavior,” by Christopher Lowry et al., published online on March 28 in Neuroscience.)