I was wondering how many people here actually saw those episodes... The improv stuff that they had the contestants sometimes do was absolutely amazing! One of the contestants owned a 'japanese pancake' restaruant in Tokyo that I loved. He would fold models for his customers and was really charismatic, and I think he was part of the reason why I got into origami. He was eliminated in a contest where they had to make a particular crane chain the fastest.
We have satellite TV but only one channel, NHK.
But TV Champions is discontinued on NHK now

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But since it's Kamiya's model, I wouldn't hope for diagrams. They're too time consuming to make I guess, in relation to how much time he spends designing.