Toki rakujitsu (1992)

Faraway Sunset tells the story of the famed bacteriologist who is known to have discovered the agent that cause syphilis, and for his relentless search for a cure to yellow fever. As a toddler, his mother’s neglect had caused an accident to his left hand, fusing together all the fingers in a bizarre twist of fate. Naturally extremely remorseful for being the cause of her son’s handicap, she does everything she could to ensure that he gets to lead a normal life, despite having to fend off bullies and unfair prejudices.