Japan's Liberal Democratic Party's (LDP) leadership election candidate Fumio Kishida attends a debate ahead of the LDP leadership election, in Tokyo, Japan on Sept. 12, 2020. (Photos: Charly Triballeau/Pool via Xinhua)

Japan's Liberal Democratic Party's (LDP) leadership election candidate Yoshihide Suga attends a debate ahead of the LDP leadership election, in Tokyo, Japan on Sept. 12, 2020.

Japan's Liberal Democratic Party's (LDP) leadership election candidate Shigeru Ishiba attends a debate ahead of the LDP leadership election, in Tokyo, Japan on Sept. 12, 2020.

Japan's Liberal Democratic Party's (LDP) leadership election candidate Shigeru Ishiba attends a debate ahead of the LDP leadership election, in Tokyo, Japan on Sept. 12, 2020.

Japan's Liberal Democratic Party's (LDP) leadership election candidate Yoshihide Suga attends a debate ahead of the LDP leadership election, in Tokyo, Japan on Sept. 12, 2020.

Japan's Liberal Democratic Party's (LDP) leadership election candidate Fumio Kishida attends a debate ahead of the LDP leadership election, in Tokyo, Japan on Sept. 12, 2020.