While the world is vigorously searching for what Fed "Tapering" means, it seems the professionals in the financial markets are just as intrigued. With equity bulls yelling "buy" and bond bulls screaming "bye", it seems the story count within Bloomberg for the word "taper" is as close a proxy for bond market volatility as anything else we can find.
[4]
and JGB vol is just a closely synced.
Charts: Bloomberg