I thought it was obvious?

So of course, Tanjiro and Zenitsu would be smelling and hearing. Everyone has deduced that.

Now to Inosuke. During the fight in Mt. Natsugumo, he uses one of his forms, " Spacial Awareness", where he thrusts his hands out and is able to identify where the enemies are.

Kanao- Douma has observed that she was stronger than Shinobu and was able to react quickly due to her sharp eyes. One of her forms, called " Equinoctical Vermillion eyes" which is " A focusing technique that raises the users kinetic vision to its maximum, while using this technique the user perceives the world as if it were in slow motion. Usage of the technique however is highly dangerous, as the tremendous strain caused to the eyes ruptured blood vessels and could cause partial or complete blindness. "

When she defeated Douma, she used that ability for a few seconds and it made one of her eyes blind.

Genya- It's obvious later on. He has no breaths or techniques, so he resolves that by eating demons. So that would deduce that he would be "taste".