B3-NK1 (Japanese: からくりベンケイ Karakuri Benkei) is a Rank B Lightning-attribute Yo-kai of the Brave tribe, and the Tsukumono tribe as of Yo-kai Watch 4.


Video games

Anime series


B3-NK1 wears a yellow armor with purple shoulder-neck and waist pads, a number of blue beads and black gloves with gold linings. He has green facial features. He also carries a naginata.

In the anime, he is eager and hard-working in his quest for the "Heroic Screws" (Japanese: 英雄のネジ Eiyū no Neji), which he believes he could awake the true power of his naginata.

Using his naginata, B3-NK1 can pierce through modern technology devices without making holes in them, and uses it for looking for screws needed for said devices to work in order to assimilate them with his weapon and forging the "ultimate weapon". In particular, he looks for Heroic Screws, special screws that represent the souls and powers any form of machinery, and it's said that collecting 1,000 of them will awaken the true power of his naginata.


Yo-kai Watch

B3-NK1 appears on all floors of Gourd Pond Museum at night (Breezy Hills).

Yo-kai Watch: Wibble Wobble

In the Japanese version Puni Puni B3-NK1 was introduced in the Puni Puni Factory event as an enemy who can be befriended.

Yo-kai Watch 2

B3-NK1 can be found in the area behind the 20 Gate Globe Door.

Yo-kai Watch Blasters

B3-NK1 can be found through Patrol in Breezy Hills. Alternatively he can be freed from the Crank-a-kai with a Red Coin.

Yo-kai Watch 3

B3-NK1 can be found under cars in Breezy Hills, alternatively the player can find and befriend him in the Kyubot or Venoctobot Dungeons as a normal enemy.

Yo-kai Watch Busters 2

B3-NK1 can be found and befriended in the Karaclear Noah Sword Dungeons

Game data

Main series games data

Yo-kai Watch

Karakuri Benkei YW2-004
Stats Calculation
This shows B3-NK1's stat on level: 99.

Type Name Power Attribute Range
Attack Lightning Slash (Japanese: 閃光ぎり Senkō Giri) 20-44x3 Single enemy
No description.
Technique Shock (Japanese: 電流の術 Denryū no Jutsu) 20-90 Single enemy
No description.
Inspirit Cyborg Strength (Japanese: からくりパワー Karakuri Pawā) Stat raise Single ally
Raises an ally's DEF by making part of its body mechanical!
Soultimate Move B3-NK1 GUN (Japanese: からくりマシンガン Karakuri Mashin Gan) 19 x 9 (1)
20 x 9 (2)
All enemies
Rapidly fires blades. Likely to be either critical or a miss.
Skill Sword Hunting
Power increases each time it defeats a foe.

Yo-kai Watch 2

Blasters Stats

Yo-kai Watch 3

Blasters Stats

Yo-kai Watch 4

Attribute tolerance

Held items


Spin-off games

Yo-kai Watch Blasters

Yo-kai Watch Busters 2

Other games

Yo-kai Watch: Wibble Wobble

B3-NK1 Wib Wob
Stats Calculation
Soultimate Move
Other Effects
Soultimate Levels
LV01 00
LV02 00
LV03 00
LV04 00
LV05 00
LV06 00
LV07 00
Skill Levels
LV01 Effect: 00
LV02 Effect: 00
LV03 Effect: 00
LV04 Effect: 00
LV05 Effect: 00

Yo-kai Watch: Ukiukupedia


Lightning Attribute
Karakuri Benkei YW2-004
Level 30
Fire Attribute



Lightning Attribute
Karakuri Benkei YW2-004
Fire Attribute


Fire Attribute



  • Befriended: "*clunk* ...Malfunction... Please initiate friendship-repair routine..."
  • Loafing: "Lemme just rest..."
  • Receiving food (favorite): "Good. Very good!"
  • Receiving food (normal): "OK."
  • Receiving food (disliked):

In the anime

B3-NK1 appears in Yo-kai B3-NK1, in which he causes some of the electronic artifacts in the Adams House to suddenly stop working. When confronted by Nate, he reveals he caused these malfunctions in his search for the "Hero's Screw", which he states that they can awaken the true power of his naginata, collecting his 998th from Nate's air conditioner, and the 999th from the vacuum cleaner near Jibanyan, Nate, and Whisper. To fix B3-NK1's messes, Nate summons Robonyan, who is then attacked by B3-NK1's polearm when the Yo-kai notes Robonyan's metallic body. However, Robonyan oddly turns out to enjoy its piercing, to the point where he kept prodding B3-NK1 to keep searching him for a Heroic Screw despite his denials to the group when confronted on it. Suddenly, Robonyan begins extending his limbs, tails, and neck, then quickly retracts them, and falls off of B3-NK1, leaving behind a Heroic Screw, and one of the best in the collection to boot, and assimilates it with his polearm, causing it to assume a brand new form. B3-NK1, out of gratitude, gives Nate his Yo-kai Medal.

In The New Yo-kai Watch, B3-NK1 was seen in Yo-kai-lifornia where he is among the Yo-kai waiting in line for the Yo-kai Watch Model Zero to go on sale.

B3-NK1 makes a cameo in Titanics Of The Caribbean as a member of Baddinyan's pirate crew for Directator's latest movie.


"Karakuri Benkei" translates as "mechanical Benkei".

"B3-NK1" is the name "Benkei" partially cyphered to resemble a machine's serial number.


B3-NK1, like Benkei, B3-NK1 is based on the warrior monk-turned-lieutenant who served Minamoto no Yoshitsune (see Benkei#Origin).

His Japanese name, "Karakuri Benkei", refers to karakuri ningyo, mechanized puppets built during the years from the 17th to the 19th century for entertainment purposes, festivals and stage tricks.


  • Even after B3-NK1 has awakened the new form of his polearm in EP023, the polearm seems to have returned to normal in his subsequent appearances.

In other languages

Language Name Meaning
Flag of Japan Japanese からくりベンケイ Karakuri Benkei
Flag of France French B3-NK1
Flag of Spain Spanish B3-NK1
Flag of Germany German B3-NK1
Flag of Italy Italian B3-NK1
Flag of the Netherlands Dutch B3-NK1
Flag of Russia Russian Б3-НК1 B3-NK1
Flag of South Korea Korean 사이보그 요괴인 Saibogeu yogoein
More Languages
Flag of Brazil Portuguese (Brazilian) Ben-K800

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