Kozuka is one of the best in the world and can never be counted out. His intrinsic abilities and qualities are always there. His disadvantages this season seem to be
1) programs that took him a long time to master and so far in competitions he has not connected fully to it and in turn connected it to the judges and audiences, suffering such low PCS

I've been protesting for him all season. He needs to raise both his TES and PCS. This video report focuses on his working on his quads which of course could help his TES and indirectly his PCS especially if it imparts confidence to him. However, he cannot count on accidental success two years in a row, (maybe?

,) so getting the quad consistent and reliable will go a long way to boost every aspect of his skating - technical, mental, and presentation wise.
2) lack of international competitions as he did not go to the GPF or the 4CC, missing out competition practices, judges' feedback and momentum. However, he could turn this into an advantage by spending more time training and cutting down travel fatigue and demands on the body.
Good luck and best wishes to Takahito.
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