Marutai no onna

One day in the dark, actress Biwako (Nobuko Miyamoto) witnesses a murder. She becomes an unwitting witness of the crime and police asks her to be the lead witness in the trial. The gangs who sent the assassin sends their lawyer Nihonmatsu (Toru Emori) to bribe Biwako so she wouldn't take the stand. Biwako refuses, and the gangs are now out to kill Biwako before the trial. (imdb)