The headline in (non financial) press in Japan:

  • BREAKING: Bank of Japan Gov. Haruhiko Kuroda shocks markets by adjusting the central bank’s yield curve control program and sparks a sharp rise in the yen.

As a counter, I've seen the headlines in the financial press saying Kuroda 'tweaked' policy.

I think the "shock" is a much better description. Markets had pretty much settled on waiting until Kuroda's term finished in April for any sort of change from the BOJ. Kuroda dumped on that today.

Bank of Japan Governor Kuroda