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"You're already in shape" - Equip yourself with the strongest "core" - A collaboration between "Core Force" and "Fist of the North Star"!


Yuuki Co., Ltd. has released product images of its conditioning accessory "Core Force" collaboration model (four types, limited to 2,000 units in total) with "Fist of the North Star," which is set to be made into an anime this year. Additionally, pre-orders have begun today, March 6th (Friday), at the official online store and retailers nationwide (excluding some stores).
This project is a special collaboration model created to commemorate the broadcast of this year's anime, and is a limited edition item that combines the overwhelming visuals of "Fist of the North Star" with Core Force. Four models will be released, all of which are limited to 2,000 pieces, with Core Force parts designed to resemble the Big Dipper and featuring the image colors of Kenshiro, Raoh, Toki, and Jagi.

Fist of the North Star anime official website

What is Core Force?

Core Force is a conditioning accessory that can be used in a wide range of situations, from maintaining a comfortable and healthy daily life to improving sports performance. It is a favorite among top athletes, such as professional golfers and baseball players, and is currently attracting a lot of attention in the sports world and among health-conscious people.

"Why was Core Force chosen?"

① Contains the original ingredient "Core Force Powder"
The greatest secret of Core Force is its unique "Core Force Powder," which is made from rare natural ingredients that have been specially processed. This powder is specially coated (or encapsulated) throughout the accessories, and wearing it helps you maintain your daily conditioning and balance of the body.

② One piece can be used for multiple purposes with a "flexible fit"
Unlike typical accessories, this item has no clasp. Magnets are placed throughout the product, allowing for great flexibility in how it can be used. Wear it around your neck as a necklace. Wear it around your wrist as a bracelet. Wear it around your ankle as an anklet. Its high practicality means you can style it however you like to suit your mood, outfit, and occasion.

3. High-quality design that blends into everyday life
The sophisticated design is luxurious and suitable for sports, suits, and everyday wear. Because it doesn't look like it's made for sports, you can wear it casually 24 hours a day.

Collaboration products


Core Force Loop Kenshiro Model
Core Force Loop Raoh Model
Core Force Loop Toki Model
Core Force Loop Jagi Model

Highlights of the collaboration products


Fist of the North Star collaboration color variations
Limited edition colors to match the characters
There are four special collaboration models, each featuring the image color of each character.

Fist of the North Star collaboration: The Big Dipper
Seven gold stars appearing in the Big Dipper
Depending on how you wrap it, the parts will be arranged to form the Big Dipper.
*The Big Dipper will only appear on wrists up to 17.5cm in circumference.


Fist of the North Star collaboration cap enlarged view
Detailed leather engraving
The end cap is precisely engraved with the "Fist of the North Star" logo.


Fist of the North Star collaboration colored wire
The wires are also specially colored
Colored wires are used to match the color of each model.


Fist of the North Star collaboration limited edition case
Limited edition with a special case
The outer box is a limited edition with the Seven Scars foil stamped on it, and the inner box is also a special edition with the logo.

*The Fist of the North Star collaboration model is available for sale on the Core Force official website and at some retailers.
Please note that the first 2,000 units are limited edition and may sell out quickly even at authorized retailers.

Company Profile

Company name: Yuuki Co., Ltd.
Date of establishment: 2001
President and CEO: Koji Oda
Address: 3-1-5 Nishi-Owa, Kuki City, Saitama Prefecture, 340-0206
Official website:https://www.coreforce.jp

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