If “Does Your Soul Have a Cold?” strikes you as an unusually arresting title for a documentary, you can probably put it down to the fact that it was the slogan for a SmithGlaxoKline advertising campaign that brought antidepressants to the Japanese market in 2000. In other words, it’s the work of a professional copywriter. The idea was not only to introduce the Western concept of depression to a culture still leery of it, but also, by suggesting that, like a cold, anyone could “catch” it, to reduce the shame the Japanese felt about being depressed. (We Americans — New Yorkers especially — are, of course, proud to be depressed, and are suspicious of anyone who isn’t at least seeing a therapist: What’s wrong with them?)