How do you get into the sunken shrine?

[Pantsu_shot]

I have the conch and I'm at the entrance. there's 3 doors blocking the way.

[D0NP1MP0N]

Do you already have the map? if not, you're still not able to go in, if you already have it
you have to reach that zone at past, so, when you go to the future, those doors will disappear, for that, one of two rooms at left, where you see a golen at middle and 2 skeletons at top and bottom, there you will see a hole in which the color does not degrade, you will fall into a room with a change of time, a breakable crystal and a potion, change of time and come back, then you can enter