To get here, you must reach the Timid Maid in Ashina Outskirts outpost, who will give you Young Lord's Bell Charm. With that in your inventory, pray at the kind-faced Buddha sculpture in the Dilapidated Temple.
Sculptor's Idol (Dragonspring - Hirata Estate)
Near the idol.
At the bottom after grappling down the tree branches.
Next to the Nightjar.
Start of the bridge.
River
Treasure Carp Scale (shore)
Behind a rock on the beach, off the left side of the bridge.
Treasure Carp Scale (bridge)
Swim under the bridge and kill the treasure carp swimming around there.
Pot Noble island
Swim along the river and kill the treasure carp near where the Pot Noble is.
In the boat on the shore.
Estate path
First part
From the sculptor's idol up to the door that can't be opened from this side, inclding the areas to the left and right of the path.
Sculptor's Idol (Estate Path)
Secluded area on the left of the path.
Right side
The area on the right of the main path.
Behind a building near the wall closest to the idol.
Far corner of the large building with fires.
Sleeping quarters
The area with a fireplace and rows of identical sleeping rooms.
Behind a building near the back wall.
Around the fireplace
Assuming you've also bought the firecracker tool back in Ashina Outskirts, acquiring the Flame Barrel brings your total tool amount to 3, which is the requirement for getting the esoteric text from the Sculptor.
Back at Dilapidated Temple.
Second part
Dying man
On the side of the steps coming from the sleeping quarters.
Estate path gate
The gate between the two parts of the estate path.
Left side
In the small bamboo grove behind the closed gate you can grapple over.
Bandits (estate path)
"Hey, open up! .."
Right side
Bandits (temple)
"We burning this temple next? .."
Living quarters
The second area on the right side of the estate path.
Locked-in residents
"Please try not to move .."
Flower path
Bamboo Thicket Slope
Sculptor's Idol (Bamboo Thicket Slope)
River
Going up the slope from the idol, grapple up to the left as soon as it's possible, and jump in the river. Swip up and under the bridge.
Secret path
From the river, grapple up to the branch closest to the bridge. Follow the path upwards and cut through the thin bamboo stalks blocking the cave entrance.
Grapple up the second grapple point on the left.
Across the bridge.
Estate
Back way
"I bet the estate fire .."
Clearing
Crawl under some bamboo stalks on the left side of the steps as you go down.
Main hall
Main building
Secret room
Hug the wall at the end of the hallway, with a tapestry.
Sculptor's Idol (Hirata Audience Chamber)
Give Unrefined Sake to the Sculptor
Back in Dilapidated Temple.
Afterwards
Talk to Sculptor
Give Unrefined Sake to Emma