Walk to the gate ahead and press V to activate Eye Awakening, revealing two new "ropes".
The main road on the left is blocked by ropes. Head into the house on the left and collect any items inside.
We can see many Phantom Demons opposite the house. Use the cart on the left to take out half of them.
After defeating them, go to the small room on the right, use Eye Awakening to reveal the small spiders, and kill them.
Then retrace your steps; the previously blocked main road is now passable.
Follow the main road to a residence and assassinate the Phantom Demon in the hallway.
Some doors on both sides of the hallway can be opened, containing materials you can collect.
After collecting the materials, head to a courtyard filled with enemies and eliminate them all.
After defeating the enemies, follow the ropes and crawl through the gap.
After crawling in, press V to defeat the spider.
Open the dropped chest to obtain the Oni weapon "Dual Blades [Niten]".
It's simple to use: once the blue energy bar in the bottom right corner is full, press G to release it instantly.
