Ninja Slayer is a ninja who kills other ninjas in the name of ninja vengeance. In a dystopian world, he stands alone.
S01:E01 - Born in Red Black
Seeking vengeance, Fujikido Kenji merges with the spirit of Naraku Ninja to become Ninja Slayer.
S01:E02 - Machine of Vengeance
After a massive drug deal is interrupted, Arson faces Ninja Slayer in a battle to the death.
S01:E03 - Last Girl Standing, Part 1
Yamoto Koki uses her powers to save herself and her friend Asari from a gang attack.
S01:E04 - Last Girl Standing, Part 2
Shogo shows up to warn Yamoto that the Soukai Syndicate is headhunting her.
S01:E05 - Rage Against Tofu
Injured Shigaki joins other injured workers in taking revenge against a tofu manufacturing plant.
S01:E06 - Surprised Dojo
Six Gates ninjas Earthquake and Hugeshuriken hunt for the Dragon Dojo so that they can burn it down.
S01:E07 - Bane of Serpent
Freelance journalist Nancy Lee goes into the forlorn Furutama Projects to chase down a lead.
S01:E08 - Apocalypse Inside Tainted Soil
Nancy and Ninja Slayer break into a secret cloning mill and make an unexpected discovery inside.
S01:E09 - One Minute Before the Tanuki, Part 1
Nancy tries to convince Ninja Slayer to help get her inside a hot water bottle manufacturing plant.
S01:E10 - One Minute Before the Tanuki, Part 2
Ninja Slayer and Nancy find a secret access point to the plant's mainframe.
S01:E11 - Menace of Darkninja
Ninja Slayer goes to the cottage. A happy reunion is shattered when Darkninja launches an attack.
S01:E12 - Day of the Lobster
Ninja Slayer rescues the captive Nancy. An old foe embarks on a new quest.
S01:E13 - Swan Song Sung by a Faded Crow, Part 1
Silver Karasu, a ninja who executes those who commit tsujigiri, is confronted by his own mortality.
S01:E14 - Swan Song Sung by a Faded Crow, Part 2
With his time running out, Kagi gives Yamoto a crash course in iaido training.
S01:E15 - Sushi Night at the Barricade
When Omura's urban expansion plans threaten Tottoriville, its residents start an uprising.
S01:E16 - At the Treasonersvill
Ninja Slayer joins Ikki Uchikowashi to see what kind of organization Yukano has gotten into.
S01:E17 - Treasure Every Meeting
Yamoto stumbles into a church on the run and collapses, only to be awakened by a ninja.
S01:E18 - Ever Felt Cheated?
Naraki meets Maname to join in a march against poverty. Maname is not all that she appears.
S01:E19 - Stranger Stranger Than Fiction, Part 1
Nancy and Ninja Slayer plan to eliminate Laomoto. Nancy is met by an unforeseen band of ninjas.
S01:E20 - Stranger Stranger Than Fiction, Part 2
Trufflehog finds Ninja Slayer's hideout with the plans to kill Laomoto. Baba Yaga approaches Nancy.
S01:E21 - Neo-Saitama in Flames, Part 1: Like a Bloodarrow Straight
Laomoto makes a shocking declaration. Ninja Slayer runs into an old rival.
S01:E22 - Neo-Saitama in Flames, Part 2: Darkninja Returns
Ninja Slayer and Darkninja fight one-on-one. Two ninjas encourage Darkninja to take on a new task.
S01:E23 - Neo-Saitama in Flames, Part 3: And You Will Know Him by the Trail of Ninja
Ninja Slayer challenges the Six Gates ninjas. A strange phenomenon tortures Ninja Slayer's mind.
S01:E24 - Neo-Saitama in Flames, Part 4: Dark Dusk, Darker Dawn, Part 1
Laomoto offers Hellkite a last chance. Ninja Slayer must defeat Laomoto's bodyguards.
S01:E25 - The Best of Ninja Slayer From Animation
Select segments from the Ninja Slayer saga that could not be included in the regular series.
S01:E26 - Neo-Saitama in Flames, Part 5: Dark Dusk, Darker Dawn, Part 2
Naraku Ninja and Laomoto continue their rooftop duel. Laomoto strikes back with many ninja souls.