Update : Jan. 04, 2010
As explained in 'What kind of market information is available to investors?', TSE indicates the special quote and the aggregate shares on each side of the order book up to the special quote price, as well as the 7 next best buy and sell prices with their number of shares.
The table below shows the order book with a special bid quote of 500 yen. So TSE calculates the aggregates of offers at prices lower than and equal to that price, and of bids at prices higher than or equal to that price. Thus we can see that there are sell orders for 800 shares at prices up to 500 yen and buy orders for 5,700 shares at 500 yen or more. So the TSE provides information indicating that there is a special quote at 500 yen with a net of 4,900 shares.