TOKYO -- Boxers, janitors, fishermen, the heroes of Keisuke Yoshida’s movies are Japanese society’s angst-filled losers, struggling against odds in a violent, imperfect, often-crazed world.The Japanese director and his three latest works are being featured at the Tokyo International Film Festival, opening Oct. 30.“When you think about how the world can become a better place, what’s at the bottom of the problem is a lack of imagination.