Companies tasked with redeveloping the site of the iconic Tsukiji fish market in Tokyo said Wednesday they plan to invest 900 billion yen ($5.7 billion) in the project, which includes building a multi-purpose stadium. The consortium, including real estate developer Mitsui Fudosan Co., said it aimed to turn the location into a “gateway to Tokyo” that would draw people worldwide for sporting events and international conferences. “We will promote urban development by valuing elements such as the excitement brought by sports and Japan’s world-renowned cuisine,” Mitsui Fudosan President Takashi Ued…