TOKYO (AP) — Tokyo has signed up five more Japanese companies to sponsor the city's bid to host the 2020 Olympics, a move organizers say adds to the economic stability of its campaign to bring the games to the Japanese capital.

The five new companies backing the bid are Marudai Food Co., EH Inc., a private-label manufacturer, amusement corporation Maruhan Corp., travel agency TOPTOUR and Daiwa House Industry, Japan's largest homebuilder.

The addition of the five companies brings the total number of corporate sponsors to 16. Companies that previously signed up include ASICS Corp. and Mizuno Corp., two of Japan's leading sporting goods manufacturers, as well as All Nippon Airways and Japan Airlines.

"It is clear that our bid enjoys widespread support in the Japanese business community," Tokyo 2020 bid president Tsunekazu Takeda said.

Tokyo is bidding against Istanbul and Madrid. The IOC will select the host city at its meeting in Buenos Aires on Sept. 7.

The announcement by Tokyo organizers came just four days after Istanbul signed up seven leading Turkish companies to support its bid.

Tokyo, which hosted the 1964 Olympics, is bidding for a second straight time after finishing third in the IOC vote for the 2016 Games, which went to Rio de Janeiro.

The Japanese capital is boasting its safety, advanced infrastructure and convenience as reasons why it should host the games.