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International Judo Federation Approved Black Belt


- Excluding taxes (international sale) (more details on taxes)
- Shipping fees : $10.00 (more details about shipping & delivery)
- Return / exchange : must not be embroidered (check our returns & refunds policy)

- Availability: ~ (at warehouse)  |  Estimated shipping date:
* Automatic update based on selected options

Availability: usually shipped within 2 business days (in stock)
* Automatic update based on selected options

Sizing / IJF regulation
  • Belt
  • Embroideries
  • Summary & validation


[Black Belt] IJF Superior Kuroobi (JOXB)


[Gift Box] Silver Cardboard Box / Wooden Box

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Product description: Deluxe IJF Approved Kuroobi (JOXB) - Black Belt

Official International Judo Federation Deluxe Judo Black Belt

Black belt of 100% high quality cotton, featuring a width of 4.5 cm. It is the official belt of the International Judo Federation (IJF), model of the year 2011. Black Judo belt with the logo "KuSakura International" and the logo "IJF Official". This is THE belt for competitors, especially at an international level.

This model is characterized by 13 rows of top-stitching for a maximum strength and a classy big knot. You can also opt for the official IJF standard type belt (JOIB) which is with only 10 lines of stitching more flexible and your choice if you prefer a more secure and smaller knot (over strength).

About the women's type Judo belts (with white stripe in the centre): The Kodokan rules and the Japanese Judo federation impose a specific model for women for colored belts up to red belts of high grades. Outside Japan, the women's type Judo Obi are often not authorized and women wear men's belts. However, in certain Dojos and Jujutsu schools they are still used. Judo women's belts are 5 cm shorter than men's belts. Also note that the white stripe covers 4 lines of stitching (on either side of the belt), resulting in only 9 visible rows of top-stitching, although there is a total of 13 lines.
Note, the women's belt being an official Japanese version, is not admitted to international competition.

Optionally with this belt we offer a storage or gift box from either silver cardboard or a wood called Kiri. The Kiri is a traditional light-weight wood, often used in ancient times for the conservation of precious objects because of its characteristics to absorb humidity and resist fire.

  • Core: 100% cotton, felted
  • Outer layer: 100% cotton
  • Width: 4.5 cm
  • Stitching: 13 lines of stitching
  • Type de broderie: non-integrated only
  • Maximum embroidery length: 20 cm (IJF standard, character size will be adapted to achieve a maximum embroidery length of 20 cm)
  • Availability: 7 to 10 days

Choosing your size

At the top right of every belt page, there is a button "size table" and a button "IJF Regulations and body" for more information concerning these topics.

  • Size chart men / size chart women: ells you the recommended size according to your waistline, also taking into account the thickness of the belt (and its knot).
  • IJF regulations / measuring: Explanation of the international standards of the federation as well as how to take measurements.

Embroidery type

KuSakura proposes two types of embroidery for black belts: integrated and non-integrated embroideries. Non-integrated embroideries are offered on all belts, whereas integrated embroideries are only possible on black belts except the IJF models.

Non-integrated embroideries (from $9): are performed after the manufacture of the belt, which means that the embroidery is on top of the lines of stitchings of the belt and visible on the reverse side, too. Non-integrated embroideries are less durable than integrated embroideries but less expensive, because they are easy and fast to achieve.

* Integrated embroideries are not possible for the models [Black Belt] IJF Superior Kuroobi (JOXB).

[Non Integrated Embroidery] For All Belts - Position 1


[Non Integrated Embroidery] For All belts - Position 2

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About embroideries

All embroideries are realized on a high-end professional machine of the brand Barudan. A non-integrated embroidery delays the shipping by 3 days and an integrated embroidery by 3 weeks.

The embroideries have an average size of 2.5 cm per character for Japanese characters and English capital letters and 1.5 to 2 cm for English lowercase letters.

We offer embroideries on one end or both ends of the belt. If you would like an embroidery at a different spot, thank you for contacting us for a quotation. *However, given the little space on a belt, it is not possible to embroider e.g. a logo.

1 - Embroidery Content

By default, we offer to embroider your first and/or your family name and further any other word or expression of maximally two words.
It is necessary to choose the corresponding option to the desired embroidery for that the billing is correct. Either $9 for a name or $17 for a first AND family name or all other embroideries consisting of maximally 2 words.

  • First OR family name: e.g. Marc, John, Smith, Miller, etc.
    In the case of a compound name : Thank you for choosing the option "First AND Family name". We refuse to embroider a compound name PLUS family because of their length and complexity.
  • First AND Family name : e.g. Marc Smith, John Miller, Claude. C, Jack B. etc. (We do not recommend the combination of a compound name PLUS family name, to avoid embroideries that are too long.)
  • Initials : MD, CD, etc. written in English (capital or cursive letters) only ! (Initials do not exist in Japanese.)
  • Other word : This might be the name of your Dojo or any common word such as "Judo" or "Jujutsu". Note that this option is limited to maximally 2 words.

Name + initial = 2 names. If the requested embroidery content differs from the number of word option, your embroidery will be reduced to what has been paid.

Official IJF rules concerning embroideries/markings

The embroidery standards for official IJF Obi are very specific. The maximum size of the embroidery is 4 cm x 20 cm. Our team will do the necessary to adapt the size of your embroidery to the current standards. Therefore, the size per character for relatively long names/surnames will be reduced to not exceed the 20 cm total length.
Given the average length of Western names, the option "name AND family name" is not recommended for such products, because the embroidery size will be significantly reduced. Embroidery other than your name or surname are banned in international competitions and only one side can be embroidered.
Unless otherwise stated by the customer, embroideries on IJF products will be adapted to match the standards for competitions.

2 - Languages and fonts

It is possible to embroider in Japanese as well as in English. In the case of an embroidery in Japanese, the translation is free. You simply enter your name in English and then choose the font "Japanese - Kaishotai" or "Japanese - Gyoshotai"

  • In Japanese : vertical only, classic font Kaishotai or *Gyoshotai. (*non-integrated only)
  • In English: vertical or horizontal
  • In English cursive: horizontal only
  • Note : Initials do not exist in Japanese. All initial embroideries are automatically embroidered in English.
3 - Orientation of the embroidery

All belt embroideries can either be made vertically or horizontally, except for English cursive letters, that of course are always horizontal.
* unless otherwise stated, all horizontal embroideries are embroidered so that the brand logo is worn on the right side (tied belt).

Japanese characters are usually embroidered vertically. Regarding English capital letters, the choice is yours.

4 - Content

This field is required. This is the embroidery content. This field must contain ONLY the desired content (maximally 30 characters).

5 - Colors

You can choose of 20 different colors for your embroideries.
Note that for quality reasons the colors silver and gold are not shiny/metallic as for the black belt integrated embroideries.

6 - Files or additional comments/instructions

In the field "other instructions" you can give us more details regarding the embroidery content and its realization.

Finally, you can upload a picture of the desired embroidery. Note that in many cases there are several possible variations for the name transcription in Japanese. We will not accept any claims regarding name transcriptions in Japanese if no further/exact instructions were given.

Grade (Dan) line embroidery

For this type of embroidery, it is necessary to contact us prior to ordering to determine together all details. You can visit the page embroidery information for more information before contacting us.

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About the belt sizing

Size chart
  • The size of the belt is calculated using the formula waist size x 2 + 90~100 cm.
    This formula provides a length of about 20 cm for each end once the belt is knotted.
  • We recommend to choose a 0.5 size larger for very thick belts because the knot will be bigger. The same goes for extra large/wide belts (width 4.7 cm instead of 4.5 cm).
  • The belts shrink about 10 cm when first washed, but will stretch again when used and regain their original length.
  • You can order every belt model customized, simply contact us for a quote.

About the belt sizing

Size table
  • The size of the belt is calculated using the formula waist size x 2 + 90~100 cm.
    This formula provides a length of about 20 cm for each end once the belt is knotted.
    Note that the women's sizes are 5 cm shorter than the men's sizes.
  • We recommend choosing a 0.5 size larger for very thick belts because the knot will be bigger. The same goes for extra large/wide belts (width 4.7 cm instead of 4.5 cm).
  • The belts shrink about 10 cm when first washed, but will stretch again when used and regain their original length.
  • You can order every belt model customized, simply contact us for a quote.

The International Judo Federation (IJF) regulations

  • Belt of 100% cotton.
  • 8-13 rows of stitchings.
  • Width between 4 and 4.5 cm and thickness between 4 and 5 mm.
  • The knot of the belt has to be tight/strong and must not loosen when pushing with both hands from both sides.
  • The belt must be long enough to leave at least 20 cm (maximally 30 cm) on each end once knotted.
  • Embroidery : first and/or family name only. Dimensions: 3 cm x 10 cm maximum.

For competitions not organized by the IJF, the rules may vary according to the organizer. However, the IJF standards are always accepted. Note that the local/regional rules are usually not very strict, belts may not be checked and all embroideries are accepted.

About the measuring

  • - Waist circumference must be taken over the jacket.
  • - Be sure to take into account the type of knot you want to make. (If you want to tie an extra thick belt with a "double knot" choose 0.5 size larger.)
  • - The belts will shrink about 5 cm. (approx. 10 cm in the beginning, but will be stretched again when used).

Seido Co., Ltd. - KuSakura Judogi Dpt.

Shirako 2-27-51
Wako-shi, 351-0101 Saitama-ken
Tel JP: +81.4-8437-1740
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