Kurosawa Kiyoshi won the best director award at this year's Venice International Film Festival, becoming the first Japanese filmmaker to win the prize in 17 years. "Wife of a Spy" tells the story of a married couple during wartime Japan. The husband is trying to reveal the military's horrific acts to the public, and his efforts gradually involve his wife. We speak to Kurosawa in studio about the themes he has tried to tackle over the course of his career.