Shoji Sakurai has had his share of "anniversaries" — some good, some bad and some, like the day he was handed a life sentence for a crime he did not commit, too painful to fathom.

In his new documentary titled "My Anniversaries" released earlier this month, film director Kim Sung-woong tells the story of how Sakurai overcame incredible adversity through a positive mindset, and now dedicates his life to helping others facing injustice.

Sakurai, now 75, endured 29 years of imprisonment, starting with his arrest in 1967 before his eventual release from prison. He has tried to maintain the same bright demeanor throughout, even after his recent terminal cancer diagnosis.