Zatoichi Darkness Is His Ally (1989)[26]

Nearing the village of his sensei, Zatoichi decides to pay the teacher a visit, only to learn that he has been murdered and his daughter forced into prostitution. Ichi's investigation into these injustices uncovers a corrupt alliance between government officials and criminals, putting the blind swordsman on a bloody path of retribution in one of the series' darkest entries.