Pinku from 1975.

A port town that prospers through deep-sea fishing for tuna. The incident occurred on the day a fishing boat returned from a long voyage. A woman running a snack bar near the port was attacked and raped. Finally, when the woman tries to see the face of her captor, he punches her in the face, rendering her blind. On another day, a high school girl was also attacked and raped on her way home from school. The woman who lost her eyesight tries desperately to find her culprit so as not to cause any more victims, but she cannot find him. One day, her sister brought her lover to her house. Her partner is a tuna fisherman, and despite being an only child, he has a reputation for being very devoted to his mother. The woman is surprised to see the man who came to her house. That day, she could smell the tuna that came from the criminal. Since she lost her eyesight, she has a keen sense of smell. There is no doubt that this man is the culprit...

When two perverts get caught trying to intrude on couples making out in the city park they decide to try some hiking and orienteering in the great outdoors. When they come across various couples making out they hatch a plan to join in the action. Oh look… it’s a bear!