# About (紹介)

Why this site exists, who makes it and how the animations are built.

## What this site is

Judo Gokyo shows the 40 throws of the Kodokan Gokyo as interactive 3D animations. Every throw is split into its five phases – kumikata, kuzushi, tsukuri, kake and the finish – with key points and arrows that show where the force goes and how Uke reacts. Around the animations you find a [judo glossary](https://judo-gokyo.guide/en/glossary/), a printable [body-parts chart](https://judo-gokyo.guide/en/body-parts/) and the [classification](https://judo-gokyo.guide/en/classification/) of judo techniques.

So far 8 of the 40 throws are animated; the others follow step by step.

## Who makes it

Judo Gokyo is a private, non-commercial project by Björn Linder, a judo practitioner and trainer from Germany. It started as a teaching aid for my own training sessions: a way to show what happens in a throw slowly, from every angle and as often as needed. There is no advertising, no tracking and no paid content.

## How the animations are made

- Each throw is modelled on the official **Kodokan × IJF Academy** reference video, studied frame by frame and from every camera angle; the video is linked on each technique page.

- Both judoka are right-handed and grip in ai-yotsu. Tori wears white, Uke blue.

- At 1× the animation runs at about real speed; the page starts at 0.25× so you can follow every step.

- Every throw is checked against the video and corrected before it is published.

## Official sources and further reading

The throws and terms on this site follow the Kodokan. For the original sources, competition rules and coaching education:

- [Kodokan Judo Institute](https://kodokanjudoinstitute.org/en/) – The home of judo in Tokyo, founded by Jigoro Kano – history, techniques and kata.
- [IJF Academy – Classification of judo and 100 Kodokan techniques](https://academy.ijf.org/news/100-kodokan-techniques) – The reference material behind the Kodokan × IJF Academy technique videos.
- [International Judo Federation (IJF)](https://www.ijf.org/) – The world federation – competition rules, events and news.
- [Deutscher Judo-Bund (DJB)](https://www.judobund.de/) – The German judo federation – grading programmes, coaching licences and clubs.

## Please note

The animations simplify real judo – bodies, grips and timing are idealised. They support, but never replace, practice on the mat under a qualified coach. If something looks wrong or unclear, please [let me know](https://judo-gokyo.guide/en/contact/).

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Source: https://judo-gokyo.guide/en/about/