Eight companies announced Wednesday that they have jointly launched a project to construct a theme park and shopping complex in Tokyo's waterfront development site in Aome, Koto Ward.

The participating companies include Mori Building Co., Mitsui & Co., Toyota Motor Corp., Itochu Corp., Dentsu Inc., Taisei Corp., Tokyo Rinkai Shogyokaihatsu and Hall Network.

The theme park complex, which will be built on a 73,028-sq.-meter plot of land leased from the Tokyo Metropolitan Government, is scheduled to be open for a limited period of 10 years. "With the new project, we'd like to make the site a source of Tokyo's vitality and make it an attractive town," said Mori Building President Minoru Mori.

According to the plans, a huge shopping complex, an automobile theme park with driving courses and displays of various automobiles, a concert hall and an amusement park will open in the spring of 1999, the companies said. Construction costs will total 50 billion yen, and participating companies expect 12 million visitors annually.