Japanese stocks plunged 9 percent from their intra-day highs on Thursday as weak Chinese data added to growing fears that the U.S. Federal Reserve may withdraw its bond buying sooner than expected, with one analyst calling this a seismic shift of tectonic plates for the markets.

"I think yesterday may well be a turning point...the inevitable 5-7 percent correction. I think yesterday marks a very important turning point for the markets. Anybody who was expecting to see even higher stock prices might well be a bit disappointed going forward," Dennis Gartman, the founder and editor of The Gartman Letter told CNBC Thursday.