What is the Final Unknown Organization in Assassin's Creed Shadows?

The Valley Yamabushi is located in the Nabari Wilds province of Iga. They are found just north of Matsu's Camp, before the river and Hinotani Shrine.

Mountain Bearer Epic Kanobo, Damage at Night Engraving, 320 Mon

You'll find the Pond Yamabushi in Mt. Hiei region of Omi. This enemy stays hidden until you sit at the Kuji-kiri near the Three-Trunked Tree. As you perform the quick-time actions, the Pond Yamabushi will ambush you. There does not appear to be any way to find the enemy before you sit down at the Kuji-kiri.

The Monk's Amendment Epic Long Katana, Ration on Headshot Engraving, Letter Found on a Yamabushi Imposter Quest item, 325 Mon.

You'll find the Clifftop Yamabushi at the Kii Assassin Outpost, in the Iseji Trails province of Kii. If you look at the map, you'll see a river runs horizontally, and acts as a border between Iseji Trails and Kumano Sanzan. The enemy is near the coast, just north of the river.

Lustrous Pearl Legendary Naginata, Knockdown on Postured Combo Ender Legendary Engraving, 320 Mon

The Pathway Yamabushi sits in the middle of Shingu, a town on the northeastern coast of Kumano Sanzan, Kii. Shingu is quite literally at the tip of the northeastern corner of the region.

Izanagi's Reach Epic Naginata, Health with Headshot Engraving, 290 Mon

The Village Yamabushi is at a small hut above the Shinobi Training Ground in Mibuno Vale, Iga. Instead of killing this Yamabushi, you'll have to conduct a quick investigation around his camp site.

Damage After Parry Engraving.

The Shadow Yamabushi overlooks the Kasuga Shrine, which sits right along the river in Otogi Pass, Iga. If you've unlocked the Viewpoint above the shrine, you can fast-travel and be directly above the Shadow Yamabushi.

Yomi's Retribution Epic Kusarigama, Critical Chance on Consecutive Hits Engraving, 260 Mon

The Forest Yamabushi is located at the Nyu-Daimyojin Shrine, which sits southeast of Wakanoura Bay in the Saika province of Kii. He is sitting under the Torii gate in the center of the shrine, trying to lure people in by telling them there's a hurt woman.

Izanami's Salvation Epic Naginata, Buildup over Half Health Engraving, 320 Mon.

The River Yamabushi is found at the shallow pond west of Ominesanji Temple in Yoshino, Yamato. The temple is the same location where "The Tournamen t" side quest takes place. The enemy is actually located directly between the temple and the Path of Serenity, where you meet Genpaku, the NPC that initiates the "Yamabushi Imposters" side quest.

Susanoo's Torrent Epic Bow, Armor Piercing on Multiple Enemies Engraving, 330 Mon

The Mountain Yamabushi is found in the Kawachi Kaza-ana Cave, which is in the Suzuka Foothills province of Omi. This is the same cave where you'll find Yuki Onna the Yokai during winter. We found this Yamabushi at the same time as Yuki Onna, and he was dead in the cave. It is unknown if he is alive if you find him outside of winter.

Letter on the Corpse of a Strange Yamabushi Quest Item, 220 Mon