Shugyo
The Forge phase of the Ishi Spiral: disciplined practice, refinement through action.
Austere, disciplined training to refine form, judgement and capability. Precision and consistency come ahead of intensity, and repetition exposes weakness so it can be corrected.
Shugyo forces specificity: what exactly is being trained, what constraint applies, and what feedback will show whether form is improving.
Shugyo increases capability, not exhaustion.