# Judo Kata

> Free local-first web app for practicing seven Kodokan judo kata with your own YouTube references, technique timestamps, notes, and IJF-style practice judging. No account. Data stays in the browser.

Canonical URL: https://judo-kata-tool.the-fortitudes.com/

## Summary

Judo Kata (also called FS Judo Kata / 柔道形) is a progressive web app for personal kata training. Practitioners paste YouTube URLs they choose, mark technique anchors (timestamps), add notes and favourites, then practice playback against that local configuration. They can also practice-judge performances using IJF Kata Commission–style criteria and keep multiple scored runs locally to track improvement. Practice scores are a training aid, not official competition results. The app does not ship a default YouTube video catalog.

UI languages: English, Japanese, Traditional Chinese (in-app locale; same URL for all).

## Who it is for

- Judo practitioners and coaches studying Kodokan kata
- Partners or coaches who want to mark a practice performance with IJF-style checklists
- People who want a private, local-first practice companion without signing up
- Anyone configuring their own reference videos rather than a fixed shared playlist

## Key capabilities

- Seven-kata catalog in performance order (technique labels only; videos are user-supplied)
- YouTube IFrame playback with user-configured URLs and anchors
- Anchor editor, notes, favourites
- Practice judging for all seven kata: element checklists, Small (−1) / Medium (−3) / Big (−5) deductions, Forgotten half-total penalty, optional per-element reviewer comments
- Multiple local performances per kata with draft/save-to-history flow and improvement chart
- JSON export / import / reset of local data (including performances)
- Installable PWA; app shell can work offline after first visit (YouTube streams are not cached)

## Kata covered

1. [Nage-no-Kata (投の形)](https://judo-kata-tool.the-fortitudes.com/kata/nage-no-kata): Forms of throwing
2. [Katame-no-Kata (固の形)](https://judo-kata-tool.the-fortitudes.com/kata/katame-no-kata): Forms of grappling / control
3. [Kime-no-Kata (極の形)](https://judo-kata-tool.the-fortitudes.com/kata/kime-no-kata): Forms of decision / decisive techniques
4. [Ju-no-Kata (柔の形)](https://judo-kata-tool.the-fortitudes.com/kata/ju-no-kata): Forms of gentleness
5. [Kodokan Goshin-jutsu (講道館護身術)](https://judo-kata-tool.the-fortitudes.com/kata/kodokan-goshin-jutsu): Kodokan self-defense forms
6. [Itsutsu-no-Kata (五の形)](https://judo-kata-tool.the-fortitudes.com/kata/itsutsu-no-kata): Forms of five
7. [Koshiki-no-Kata (古式の形)](https://judo-kata-tool.the-fortitudes.com/kata/koshiki-no-kata): Ancient forms

## Keywords

Judo kata, kata practice, Kodokan kata, judo kata practice, judo kata judging, IJF kata, Nage-no-Kata, Katame-no-Kata, Kime-no-Kata, Ju-no-Kata, Kodokan Goshin-jutsu, Itsutsu-no-Kata, Koshiki-no-Kata, 柔道形, 投の形, 固の形, 極の形, 柔の形, 講道館護身術, 五の形, 古式の形

## Facts for citation

- Free to use; no account required
- Not an official IJF, national federation, or Kodokan competition result system
- No bundled default YouTube videos — users supply their own reference URLs
- Practice data is stored locally in IndexedDB; JSON export/import/reset available
- Practice judging: each scored element starts at 10; Small −1, Medium −3, Big −5; Forgotten/omitted sets the element to 0 and halves the kata total
- Approximate max points per judge (elements × 10): Nage / Katame / Ju 180; Kime / Koshiki 230; Kodokan Goshin-jutsu 240; Itsutsu 70
- Optional paid Cloud Sync is on a waitlist (not for sale yet): planned USD 2/month, USD 11/6 months, or USD 20/year for personal metadata backup across devices — not YouTube or kata media
- Live site: https://judo-kata-tool.the-fortitudes.com/
- Contact: developers@the-fortitudes.com

## Links

- [Home](https://judo-kata-tool.the-fortitudes.com/): App entry and kata library
- [User manual](https://judo-kata-tool.the-fortitudes.com/manual): In-app how-to guide for setup, anchors, practice, and judging
- [Cloud Sync](https://judo-kata-tool.the-fortitudes.com/cloud-sync): Optional paid sync benefits, planned pricing, waitlist
- [Cloud Sync facts](https://judo-kata-tool.the-fortitudes.com/cloud-sync.txt): Machine-readable Cloud Sync summary
- [Legal disclaimer](https://judo-kata-tool.the-fortitudes.com/disclaimer): Scope, liability, and non-official-result notice
- [Full description](https://judo-kata-tool.the-fortitudes.com/llms-full.txt): Longer product facts for AI tools
- [robots.txt](https://judo-kata-tool.the-fortitudes.com/robots.txt): Crawler policy (AI search bots allowed)
- [sitemap.xml](https://judo-kata-tool.the-fortitudes.com/sitemap.xml): Indexable URLs including each kata page

## Optional

- Source repository: https://github.com/koktszho-zelca/fsjudo-kata