I didn't really want to cover this topic, due to its disappointing nature, but as it has somewhat hit the big-time news, I thought it would be strange for me not to comment on it.
It is a terrible shame that corruption poisons the sword arts, and hopefully, this revelation will do something preventing similar occurrences in the future:
The Kendo Show Early Access - HERE
Asashi Shimbun Article - HERE
AJKF Press Release (PDF) - HERE