To search the house of the archers in The Coward of Yarikawa in the Ghost of Tsushima examine the arrows on the ground near the broken door.

Then search the straw mats on the ground.

To search the house of the archers in The Coward of Yarikawa in the Ghost of Tsushima examine the arrows on the ground near the broken door.
Then search the straw mats on the ground.
To lead Yuna and Taka to the river in The Walls of Yarikawa in the Ghost of Tsushima go down the path and pass the burnt house on the left.
Go across the road and into the camp skirting around the cart on the left.
To lead Yuna and Taka to the hidden entrance keep following the river on the left until you get to a waterfall and pass under it.
To search for Junshin’s tracks in The Conspirator in the Ghost of Tsushima go to the path near the house and inspect the tracks.
To follow Mai to the stolen heirlooms and defeat the ronin without being seen in The Thief in the Ghost of Tsushima follow Mai and the ronin until one of them stops by a flag. Assassinate the ronin.
Keep following Mai and the ronin until two of them stop near a cart. Wait for a short time until one of them leaves, then assassinate the other ronin.
Keep following Mai and the ronin until you get to an area with a well.