When negative feedback must be delivered in Japan, it typically occurs privately rather than publicly. Public criticism causes shame that damages both the recipient and the relationship. Private delivery preserves face while still conveying necessary evaluation.
The recipient can process criticism and improve without others knowing about the initial failure. Some contexts (military training, athletic coaching) permit public correction, but these are understood exceptions.
When you must deliver negative feedback in Japanese contexts, find private settings. Protect the recipient’s public face while still providing the evaluation they need.