A preference becomes a study project
Tokui kata commonly designates a form that the practitioner particularly favors or masters. The choice is discussed with the teacher, according to the acquired knowledge and the objective. A kata that is impressive to look at is not necessarily the one that will allow for the most precise work now. The demands of an exam or tournament can also limit opportunities.
Identify characteristic difficulties
Locate transitions, changes in level, balances and rhythms that require special study. A form can highlight a recurring difficulty or enhance an already solid organization. The choice does not have to hide all the faults; it can be used to work on them. A list of a few specific passages is more useful than a global judgment “this kata suits me”.
Keep the other bases
Going deeper into a form does not exempt you from the kata already studied nor from the kihon. A difficulty in movement can be examined in a simpler exercise before returning to the chosen passage. The articles dedicated to the 26 kata provide reading directions, but the club program and the corrections received organize the progression. The other forms remain points of comparison.
Build verifiable monitoring
Choose a priority passage, a correction and a re-examination date. Compare tests carried out in similar conditions. Gradually add questions of rhythm and application, without claiming to exhaust all the readings of the form. The preferred kata may evolve; a change of choice does not erase what the previous study made it possible to understand.
Check understanding
Should you choose the most difficult kata to progress?
See answer
No. The relevant difficulty is that which allows an adapted study and precise feedback.

