After the strike of the 9.0 earthquake in Japan Tohoku area on March 11th, at first, there was a rapid spot price increase in the NAND Flash market, in response to the uncertain concern of an upcoming short supply. But because the impacts caused by the earthquake on NAND Flash supply chain were unknown at the time, some NAND Flash suppliers did not change the contract price in the first half of March. Then, the damage to the work in process (WIP) materials at Toshiba and SanDisk’s Yokkaichi plant came out.