If you’re hunting for the Usui Sadamitsu boss location in Nioh 3, you’ll find him tucked inside Rokuhara, south of the Yasaka Shrine: Nishiro Gate in the Heian region. He shows up during “The Dark Realm” quest, and I’ve marked the spot below along with everything I learned fighting him, because this one caught me off guard more than a few times.

Before we get into the fight itself, bookmark this guide if you’re working through Heian in order. I’ve also put together a full breakdown of every boss and location across the Heian region, so it’s worth having open alongside this one if Usui Sadamitsu isn’t the only name on your list.

Where to Find the Usui Sadamitsu Boss Location in Heian

Head to Rokuhara and look south of the Yasaka Shrine: Nishiro Gate. That’s the Usui Sadamitsu boss location, and it sits inside a dojo building you can’t miss once you’re in the area. Here’s the part that trips people up though: you can’t walk straight up to him. Rokuhara is under a Dark Realm when you arrive, and Gozuki is the one holding it in place. You’ll need to beat Gozuki first to dispel the Dark Realm before Usui Sadamitsu becomes fightable, so don’t assume you’ve hit a dead end if the door won’t open on your first pass.

Before you even reach the building, there are some genuinely tough enemies stationed right outside it. I’d clear those out properly rather than rushing past them, because getting chased into the boss room with half your health already gone is not how you want to start this fight. Take your time clearing that approach, use your Guardian Spirit if you need the breathing room, and don’t feel bad about pulling enemies one at a time instead of wading into the whole group at once. It costs you a couple of extra minutes, but it means you walk into the dojo with full elixirs and a clean slate instead of scraping by on fumes before the real fight even starts.

Is Usui Sadamitsu a Mandatory Boss?

Yes, and that’s worth knowing before you go in. Usui Sadamitsu is a mandatory boss tied to “The Dark Realm” quest, not an optional side encounter you can skip and come back to later once you’re stronger. The Dark Realm itself is the mechanic locking you out of him in the first place. It’s a corrupted state that settles over an area and blocks progress until you clear whoever is anchoring it, which in this case is Gozuki. Once that’s dealt with, the realm lifts and the dojo where Usui Sadamitsu waits opens up properly. If you’ve fought through similar mandatory encounters before, the pacing here will feel familiar, and if you want a comparison point for how these master duels usually go, our Sawamura Yasusuke location and no-hit guide covers a fight with a very similar rhythm to this one.

How to Beat Usui Sadamitsu in Nioh 3

Usui Sadamitsu fights with a sickle, and the whole encounter plays out like most of the master-tier duels in this game: fast, punishing, and very readable once you know what to watch for. The room itself is small and cluttered, so the first thing I did once the fight started was back out through the doorway to the open area outside. There’s a lot more room to work with out there, even if a few environmental objects still got in my way mid-fight.

His scythe telegraphs are actually consistent once you’ve seen them. When he lowers the weapon and tucks it behind his back, that’s your cue for an upward slash, and sometimes he chains a second spin into a double upper slash right after it, so don’t relax after dodging the first one. He’s also got a spinning attack where he holds the scythe out to the side and rotates, hitting anything nearby from basically any angle, and the safest answer is to just back away the moment you see him start winding up.

My usual approach in these fights is to keep my distance early and lean on Ninja Tools and magic before the boss closes the gap. That plan hit a wall here, because Usui Sadamitsu blocks kunai and spellwork surprisingly well. Kunai barely scratch him, and any magic that does land gets its damage cut down while he’s guarding, so don’t expect ranged tools to carry this fight the way they do against other bosses.

Thundering Calamity ended up being the move that actually turned the tide. It’s an electrical ninja skill that hits hard, and it’s worth building your rotation around if you’ve got it unlocked. I tried opening with a perfect dodge to break through his attacks and recharge Thundering Calamity faster through Evade, but that timing didn’t come together for me, so I switched to a jumping strike combo instead, leaping in and hitting him with a series of aerial slashes. That approach connected far more reliably and chipped away at him while I waited for Thundering Calamity to come back online. If you’re leaning on elemental ninja skills for this kind of fight, the timing lessons carry over well to our Master Shinran fight guide, where fire timing matters just as much as electricity does here.

Ninja Build Tips for the Usui Sadamitsu Fight

Summons helped more than I expected. I brought out minions with fire attacks, and even though Usui Sadamitsu blocks a good chunk of regular hits, watching his health bar tick down steadily from the combined pressure was reassuring. Just don’t get complacent, because his attacks come out instantly and fast. He doesn’t hit especially hard per swing, but the speed means you won’t always get a chance to react if you’re standing in the wrong spot, so keep some distance and heal up whenever you get an opening rather than pushing greedily.

Toward the end of the fight, I applied a wind element buff, which happened to line up with Thundering Calamity coming off cooldown again. Stacking those together is what finally closed it out. If you’re building a ninja-focused loadout for this fight, I’d prioritize whatever elemental buff you have available and save your strongest ninjutsu for the back half of the fight rather than dumping it all in the opening exchange, since his guard makes early ranged pressure far less effective than usual.

What You Get for Clearing the Usui Sadamitsu Boss Location

Beating him is worth the trouble. Usui Sadamitsu can drop the Myojin Scythe, which carries the Protection of Kannon as its fixed special effect, along with the smithing texts for the Stone Splitter and Sincere Buddha’s Armor. He’s also tied to a wider loot pool that includes pieces from the High Priest, Naval, Goichimonshu, Lilac, and Veteran armor sets, so it’s worth farming him again if the Myojin Scythe doesn’t drop on your first clear. If you’re leaning into a scythe or kusarigama playstyle for the rest of the Heian region, this is one of the better weapons to grab early, and it’s a solid pickup even if you end up switching back to something heavier later on.

Gear aside, don’t sleep on the fight itself as practice for the rest of Heian. A lot of the enemies you’ll run into later share the same instant, low-damage-but-fast attack rhythm that Usui Sadamitsu uses, so getting comfortable dodging on reaction here pays off more than once. If you want another boss to sharpen that same skill against, our Ibaraki Doji guide is a good next stop once you’ve got Usui Sadamitsu cleared.

Frequently Asked Questions

Where is the Usui Sadamitsu boss location in Nioh 3?

He’s in Rokuhara, south of the Yasaka Shrine: Nishiro Gate in the Heian region, inside a dojo building. You’ll encounter him during “The Dark Realm” quest.

Do I need to beat another boss before fighting Usui Sadamitsu?

Yes. Rokuhara is under a Dark Realm controlled by Gozuki, and you have to defeat Gozuki first to dispel it before Usui Sadamitsu becomes accessible.

Is Usui Sadamitsu weak to magic or kunai?

Not really. He blocks both well. Kunai deal next to no damage and magic gets reduced while he’s guarding, so lean on melee combos and strong ninja skills like Thundering Calamity instead.

What does Usui Sadamitsu drop in Nioh 3?

He can drop the Myojin Scythe along with smithing texts for the Stone Splitter and Sincere Buddha’s Armor, plus pieces from several other armor sets including the High Priest and Veteran sets.

Should I fight Usui Sadamitsu inside the dojo or outside?

I’d back out into the open area outside the building. The dojo room is small and restrictive, and having more space to dodge his spinning and upper slash attacks makes the fight noticeably easier to read.

What weapon does Usui Sadamitsu use?

He fights with a sickle-style scythe, and most of his combos come from that weapon’s reach, including the upper slash, double upper slash, and the spinning attack that hits from any angle around him.

That covers everything you need for the Usui Sadamitsu boss location and the fight itself. Check out our other guides on ingametor.com if you’re working through more of Nioh 3’s Heian region bosses.