Filmmaker Mike Mills used to think that Japan was a land where the social stigma associated with mental illness kept thousands of sufferers unseen, unheard and untreated.

But then on a recent visit, a Japanese friend unashamedly popped an antidepressant in front of him. Mills realized that the perception of mental illness had changed dramatically and that he wanted to make a movie about it.

Since then, he has dedicated himself to completing "Does Your Soul Have A Cold?" The documentary chronicles the lives of five Japanese men and women who use antidepressants to alleviate symptoms associated with clinical depression.