Citigroup-Nikko Cordial Deal too Low?

Two major shareholders of Nikko Cordial, the scandal-ridden Japanese brokerage firm, say that Citigroup's $11 billion offer to buy Nikko is too low, leading to speculation that Citigroup will increase its price.  The acquisition would mark a significant incursion into the Japanese market for Citigroup in its quest to take over the world.  See WSJ, Another Nikko Cordial Shareholder Calls Citigroup's Offer Too Low.