Since 1986, Mori Building Co., Ltd. (Headquarters: Minato-ku, Tokyo; President and CEO: Minoru Mori) has regularly conducted surveys of demand and supply trends of large office buildings with total office floor space of over 10,000 sq. m (in this survey, they will be referred to as "large-scale office buildings") throughout Tokyo's 23 wards. Forecasts of future trends in the office market are also carried out by analyzing the results of this survey from a variety of angles. This report presents the results of end-December 2008.