Sealed in the Stone Urn Walkthrough - Nioh 3

Apparently, the seal on a cursed object at Nishi Honganji Temple has been broken. It may be dangerous, so I'd best investigate.

[1] Talk to the spirit.

The spirit informs you that the seal of a cursed object has been broken. It's best if you investigate this.

[2] Head to Nishi Honganji Temple.

[3] Find the urn.

Enter the temple and turn left. At the fork, turn right.

There are 4 waves of yokai. Defeat them.

[4] Investigate the stone urn.

If the urn looks familiar, you might have seen it in the Myth, The Box's Guardian! Search through the urn.

Defeat Ibaraki Doji. We have a more elaborate guide found here. Some tips for battling them:
・Use Water-based techniques as they are weak to it!
・Watch out for her long-ranged and AoE Lightning attacks. Her sword swipes are Lightning-infused.

[5] Talk to the chief priest.

・Ninja's Locks
・Ibaraki Doji's Odachi