YOKOSUKA, Kanagawa -- This east Japan city began streaming videos of regular press conferences in which a realistic AI avatar of Mayor Katsuaki Kamiji speaks fluent English on its official YouTube ...

SENNAN, Osaka Prefecture--Yuma Yamamoto, 31, became the youngest city mayor in Japan after winning in a landslide here with 10,861 votes. His 80-year-old rival, Hiroaki Koyama, gained 2,744 ballots.

A mayor in western Japan announced his bid to become governor of Tokyo, saying he felt a strong sense of crisis over the nation’s declining population. Shinji Ishimaru, who is 41 and represents ...