There are seven Oni Armaments to collect across Onimusha: Way of the Sword, and grabbing all of them unlocks the Oni Armory trophy and achievement. Two are handed to you through the story, while the other five sit in chests you have to seek out.
Quick answer: Loot the five optional chests in Kiyomizu-dera Temple, the Underground Laboratory, the East Spirit Shrine, Mount Oe’s Castle Courtyard, and the Swamp of Arashiyama. The Oni Bow and Wind-Whipper come automatically during the main story. Collect all seven before the point of no return to earn Oni Armory.
All Oni Armament locations at a reference
| Oni Armament | Where to find it | Missable? |
|---|---|---|
| The Two Celestials | Kiyomizu-dera Temple, in the chest dropped from the second oni gate’s threads | Optional |
| Oni Bow | Oni Refuge, chest on the main path | Story (auto) |
| Wind-Whipper | Given during “The Oni’s Apprentice” mission | Story (auto) |
| Earth-Shakers | Underground Laboratory, Underground Level 4 | Optional |
| Firebird Flute | East Spirit Shrine, south of Gojo Street | Optional |
| Flashing Void | Castle Courtyard of Mount Oe, inside a slide-in cave | Optional |
| Still Water | Swamp of Arashiyama, northeast corner | Optional |
The Two Celestials — Kiyomizu-dera Temple
At Kiyomizu-dera Temple you will come across two oni gates, each sealed by a Thread Genma. Destroy the second Thread Genma that locks the second gate. Killing it releases a treasure chest that was being suspended in the threads, and The Two Celestials is inside that chest.
Oni Bow — Oni Refuge (story pickup)
The Oni Bow sits in a chest on the main path through the Oni Refuge. You cannot miss it because the story requires it, so it will land in your inventory as you progress normally.
Wind-Whipper — “The Oni’s Apprentice” mission (story pickup)
Wind-Whipper is given to you automatically during the mission “The Oni’s Apprentice.” After you are shown the Skills practice grounds and the Boss Rematch features, a chest appears, and the armament is waiting inside.
Earth-Shakers — Underground Laboratory
Head into the Underground Laboratory on Underground Level 4. Solve the fan puzzle in the next room, then open the chest in the laboratory to claim Earth-Shakers.
Firebird Flute — East Spirit Shrine
During the mission Shadows Fall, go south of Gojo Street to the East Spirit Shrine. The Firebird Flute is in a chest located where the Rift used to be.
Flashing Void — Castle Courtyard of Mount Oe
In the Castle Courtyard of Mount Oe, look for a cave you have to slide into. Flashing Void is in the chest tucked inside that cave.
Still Water — Swamp of Arashiyama
Still Water is the last of the seven. Travel to the Swamp of Arashiyama and make your way to the northeast corner of the map, where the chest holds it.
How to confirm the Oni Armory trophy unlocked
Once the seventh Oni Armament is in your possession, the Oni Armory trophy and achievement pop. If it does not trigger, you are still missing one of the five optional chests, since the Oni Bow and Wind-Whipper are guaranteed by story progress.
Note: You can free-roam and clean up every collectible up until the point of no return before the final mission, “The Clash At Rendaino.” Keep a manual save at that point, and you can jump back to mop up anything you missed rather than starting a new run.
Blue souls power these weapons in combat, so once you have collected an armament, feed it souls and use it to break boss guards or clear tougher armored enemies. Hitting foes with an active armament also returns yellow souls that restore Musashi’s health.
