Nioh - A Defiled Holy Mountain Main Mission Walkthrough

This page contains a walkthrough on the Main Mission A Defiled Holy Mountain for Nioh on PS5 and PS4. Included are all items, weapons, armor, enemies and bosses encountered in the game.

Nioh and Nioh 2 (including all DLCs) are also bundled in the Nioh Collection on PS5.

Click here to go to the Main Missions Summary page.

Main Mission – A Defiled Holy Mountain Walkthrough


You’ll find yourself in a clearing at the end of the path. Meters forward and to the left is a shrine. Rest for the long trek. Head into the cave entrance, moving forward until you enter the first large area of the cave. An enemy is resting here by the bonfire. Eliminate him. Afterwards, head forward out into the forest area. Follow the path southwest, heading up northwest. Fight the samurai  and the yokai. Afterwards, go back to the cavern entrance and find the ramp that goes up.

Heading up the ramp, take out the soldier waiting for you. Head up the path towards a shrine. Turn left and keep moving forward. You’ll see a soldier to slay . Head into the cavern and down the ladder to the other side of the mountain. Defeat the bird monster in the small trench. Head down the path downwards to fight a yokai and a house. Kill the yokai and enter the house to loot some materials. Head back up. By a firelamp and a clearing is a group of enemies you can take out. Head into the caves, northwest. Find the cavern with the ramp going up, and cross the bridge. Follow the path into the tunnel and out onto the larger cavern. Turn left. Down the path, manoever until you find the larger stone bridge. Drop down and find the exit. You’ll find yourself outside.

Fight off the enemies in this area and head up the path. You are now in a bamboo forest. Fight the soldiers and head down the road until you find the burning house. Drop down from the ledge, enter the house. Open the sliding door to the right and enter the hot spring. Head out of the house and keep heading forward towards the wooden structure. Engage the soldiers, traverse the wooden path way and enter the next cavern.

Head north through the cavern. Becareful, as there is a gigantic demon prowling the cave. Defeat him, and head through the exit. Turn left. Follow the path south west into the cave to find a Shrine.

Go back outside. Head left towards the stone stairs and walk up. Follow the path towards the house. Take out the inhabitant. Enter the double doors into the cave. Enter the double doors.

Boss Battle – Mitsunari Ishida

Main article: Mitsunari Ishida Boss Guide

This horned abomination is this mission’s boss. The regular katana’s attacks are short ranged, but his katana can launch wind-elemental projectiles. Make sure you use a spear in this fight, barraging him with strong spear attacks. Deplete his ki quickly, attacking him with a finisher afterwards.

After defeating him, a cutscene will play, and you’ll proceed to the next mission.

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