Waza Kotoba

New: the grades (30 September 2026)

• New “Grades” tab: 10 questions per round to learn the judo grades in Japanese.
  • Say a grade in Japanese (4th dan → yondan)
  • Translate a grade (nidan → 2nd dan)
  • Find the belt colour
  • Find the next grade
• The classic traps are among the answers offered: ichidan instead of shodan, shidan instead of yondan, ichikyu instead of ikkyu. An explanation shows up when you get it wrong.
• A bigger lexicon: all 16 grades, from 6th kyu (rokkyu) to 10th dan (judan), with their kanji, their belt and the accepted variants (nanadan, kyudan).
• Counting in Japanese: a table of the numbers used in the grades (ichi, ni, san, yon…).
• The colours follow the FFJDA adult grid (the French judo federation). The terms are still to be checked by the club’s teachers.

The prompt

Waza means technique, kotoba means word. A quiz, not an arcade game, and in French: I made it for a small junomichi club in Brittany, where beginners — and the parents on the bench — hear o-soto-gari or sasae-tsuri-komi-ashi for years without ever being told what the words mean.

I did not believe it was doable. Roughly what I asked, from memory:

Can you imagine a game to understand the fundamentals of judo/junomichi? Basic Japanese, technique names, katas, pictures of the techniques… I’m asking, but I don’t have much faith in what’s feasible.

The answer reframed the whole thing: technique names are Lego bricks. About thirty Japanese words — o is big, soto is outside, gari is reaping — will decode sixty techniques. So the first mode was simply: here is the meaning, assemble the name from tiles.

The iterations

1. The core. Three modes — assemble the name, translate it, sort it into its family — plus a lexicon. No pictures, on purpose.
2. Nage-no-kata. The fifteen throws, put back in order, series by series.
3. Katame-no-kata and ju-no-kata. Same mechanic, thirty more techniques, and a vocabulary grown to sixty-six bricks.
4. Pictures. The part I thought was impossible. A 1915 manual I hoped to use is not freely scanned anywhere, so we took a set of illustrations from Wikimedia Commons instead, all drawn by one person, under a free licence: 43 techniques out of 63 have a drawing, credited under it.
5. A study mode. I wanted to learn before being tested. One card per technique: the drawing, the name, the kanji, each brick explained, and where it sits in the katas.
6. The grades. One more tab, to learn the grades in Japanese, from 6th kyu to 10th dan, with the colour of each belt.

What I learned

The hard part was never the code, it was the terminology: the same syllable can be two different words — kata is a shoulder or “one side” depending on the kanji — and koshi becomes goshi by a sound rule, not because it is another technique. The game explains both, and the club’s teachers still have the final say. The kanji font, the indigo and vermilion, the tatami background: all chosen in the first exchange, never touched again.

Illustrations: Michael Hultström (CC BY-SA), diagrams by Judcosta (CC BY-SA), kata photos from the Edmonton International Judo Championship (public domain), via Wikimedia Commons.