General Info
HP Amrita Location
?? ?? (Harbour)
The Ocean Roars Again
Weak Resistant Immune
Fire Water/Pois/Para N/A

Umi-bozu is a Boss in Nioh. This is the 8th Boss that players will encounter. The player will have to face this yokai in order to proceed with the game.

Pronounced "OOH-me BOW-zoo". A large and very strange looking yokai that inhabits ocean waters. Also known as "umi-nyudo" and "umi-hoshi." A famed yokai of many legends; it takes its name, which literally means "sea-monk", from its round, bald head. Its appearances inevitably herald violent storms.


The Umi-bozu are yokai with rounded heads, resembling a giant Buddhist monk, although only their head and shoulders may be seen. They assail ships in otherwise calm seas, often by night, cloaked by their dark skin.



Possible Drops

  • Unit Leader's Armor (M): Hizayoroi
  • Unit Leader's Armor (M): Kote
  • Mikazuki Kusarigama
  • Hosho Sadayoshi
  • Seki Kanenori Dual Uchigatana
  • Magatama
  • The Raging Bull: Kote
  • Hooked Kusarigama


Combat Information

  • Health: ??
  • Ki: ??
  • Hit glowing parts for critical damage
  • Twilight: Y/N, different attacks?
  • Has a very powerful beam attack that can easily one shot most players due to pure water elemental damage type.



Video Strategy

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Strategy 1 (Melee)

It is crucial before tackling this boss that you light the 3 warding bonfires in the mission level. Lighting these will ensure that you do not have to face the lesser monsters that usually fighting along with it. 

Fire is your friend here, either through the use of talismans or fire magic. It is also possible to light your weapon on fire using the large fires by the sides of the dock if you lit the warding bonfires. You want to use a weapon and stance combination that allows you to get as many attacks in as you can quickly, taking advantage of the fire buffing you have. Dual Swords are a clear good choice here as they feature some of the best DPS in the game. As usual, try and conserve your Guardian Spirit until the final phase. When Umi-Bozu jumps into the middle of the area, use the familiar strategy of dodge and attack after it misses. If you keep buffing your fire you will be able to bring it down much more quickly.


Strategy 2 (Hykotto Masks)

The easiest way to defeat Umi-Bozu is to use Hykotto Masks. A single mask if used just after his beam attack in the first phase or after he jumps and exposes his core in the second phase can hit him multiple times for a huge amount of fire damage. Five to six well-aimed masks can quickly end the battle.


Strategy 3 (Magic)

If you are using a Omnyo magic based build you have many tools that can greatly cripple him. Water Stop Talisman reduces damage from most of his attacks and can even save you from his normally fatal water beam. Cast Weakness Talisman as soon as he moves to one side, and cast Fire Talisman I on a Raikiri and a Carnage talismin on low stance to quickly lower his hp, and cast a burn on him. Anytime he exposes his core use Guardian Spirit Talisman: I , (it takes 4-5 Guardian spirit Talismans to kill him). This works well if you have 25 spirit along with atleast 20 magic, and Kato Guardian spirit.

Umi-bozu Twilight Strategy

A detailed Strategy goes here. It should feature details on the build, level and recommended weapons and items as well as counters for specific attacks.


Umi-Bozu has two attack phases. In the first phase, the creature remains in the water. In the second phase, a now much smaller Umi-Bozu jumps into the arena proper.

First Phase
Lesser Umi-Bozu Multiple Lesser Umi-Bozu jump out of the water and attack the player. If the bon fires scattered around the arena are lit, the Lesser Umi-Bozu will be burnt to a crisp when they try to make their appearance
Energy Beam A large, yellow beam of energy that pierces the battlefield. Easy to avoid if you see it coming. Can kill you in a single hit if you don't
Regurgitate Umi-Bozu spits out wreckage from sunken ships at the player. Dodge to the side to avoid
Spit The creature spits a ball of water at the player
Tentacle Smash Umi-Bozu raises a tentacle from the water before smashing it down. Attack the yellow spot on it's downed tentacle to do increased damage
Double Tentacle Smash Umi-Bozu rasies two tentacles into the air before smashing them down. Attack the yellow spots on each tentacle to do more damage
Second Phase
Lesser Umi-Bozu Multiple Lesser Umi-Bozu jump out of the water and attack William
Jump The creature jumps into the air and attemps to land on the player
Regurgitate Umi-Bozu spits out wreckage from sunken ships at the player. Dodge to the side to avoid
Spit The creature spits a ball of water at the player
Smash Umi-Bozu smashes it's "head" to the ground
Tentacle Whip A quick tentacle whip that sweeps across the ground


Yokai Lore & History

海坊主: Umibozu - "Sea Monk". These yokai of Japanese Folklore are depicted as extremely large, black humanoid creatures that appear in the oceans, often only showing their heads and shoulders. Larger than ships and much beyond, thei appear on otherwise calm seas, during the night, to destroy ships. Stories say they may be the spirits of drowned monks, and are often angered if spoken to. Other stories say they are simply creatures of the deep seas. It is said that upon appearing they would ask a ship's crew for a barrel, and if provided one would use the barrel to bucket water onto the ship until it sank and the crew died. For this reason, a bottomless barrel should be provided instead.

To understand more about the period of history please see our Lore page.


Notes & Trivia

  • Voice Actors, if any
  • Similarities to other titles
  • Bugs and glitches associated to this boss




|  Ashikaga Yoshiteru  | |  Date Shigezane  | |  Date Shigezane and Katakura Shigenaga  | |  Derrick the Executioner  | |  Gasha-dokuro  | |  Giant Toad  | |  Great Centipede  | |  Hattori Hanzo (Boss)  | |  Hino-Enma  | |  Honda Tadakatsu (Boss)  | |  Hozoin Inei  | |  Hundred Eyes  | |  Ii Naomasa (Boss)  | |  Ishida Mitsunari (Boss)  | |  Joro-gumo  | |  Marume Nagayoshi  | |  Obsidian Samurai  | |  Oda Nobunaga  | |  Ogress  | |  Okatsu (Boss)  | |  Onryoki  | |  Otani Yoshitsugu  | |  Sakata Kintoki  | |  Shisenin Kosen  | |  Tachibana Muneshige and Honda Tadakatsu  | |  The Queens Eye  | |  White Tiger  | |  Yagyu Sekishusai  | |  Yamata-No-Orochi  | |  Yoshitsugu Otani  | |  Yuki-Onna  | |  Yuki-onna and Oda Nabunaga  |


    • Anonymous

      15 Feb 2017 16:53  

      If you can you should bring water stop talismans to this fight, his big blast attack was one shotting me if it hit but with a talisman I could take a hit and be left with about 1/4 health

      • Anonymous

        15 Feb 2017 03:35  

        so i see a lot of people whine about this boss... he is the easiest boss if you ask me... all his moves are telegraphed. make sure all 3 fires are lit... dont use the fires to light your weapon so no adds spawn on last phase... make sure you have fire talismans... soon as he pops his arms out hit the right stick left or right watch the yellow ball move up his arm soon as it gets to the top dodge and then start beating the arm down... usually it will take 6-8 arm slams to get it into the last phase after that its cake... just keep your distance and dodge when he slams or lunges and make sure you dont get pushed off the platform when he jumps and spreads out.. there are so many open windows to attack that i dont see how people dont learn

        • Anonymous

          14 Feb 2017 01:29  

          whenever I go into this fight all three fires go out after only a few secconds @ @ its making this fight hell

          • Anonymous

            12 Feb 2017 17:01  

            Use Hykotto Mask up close. Umi-Bozu won't be able to hit you, and you will do massive damage with each use. 3 to 5 mask uses will kill the boss in about 30 seconds.

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