忠義 - Loyalty

In romaji: chuugi. The first Kanji stands for 'chuu' - something along the lines of sincerity, faithfulness and loyalty. The top part of the Kanji represents middle and the bottom represents the heart. The second is 'gi' - right action, duty and justice.

In these times, at least for me, this word has a great significance. I shall write a vague explanation below.

One sensei recently said: 'If you feel you distrust or disagree with your sensei, you must simply leave. At absolutely no point do you betray your sensei.'
And I remember my sensei saying to me and the rest of the new students something along the lines of this: 'The most important thing in choosing a martial art is that you trust the sensei. If you don't trust the sensei, just leave. It is only when you trust the sensei that you feel the most reward.'

Now I drop onto the most frank part. Under no circumstances do you betray your sensei. You may leave, if the entire class disagrees with that sensei, the entire class can leave. But never should a club throw out a sensei, especially one who has taught at that club for over a decade. If they believed that the sensei was taking the wrong direction against their will, leaving will show the force of their will.
Betrayal only makes a mockery of everything that sensei ever taught.

These students were, to put it as nicely as possible, selfish and misled.
As for the few who led the coup; rotten to the core.