Japan’s prime minister, Fumio Kishida, intends to step down next month, bowing to pressure within his party to move on from his unpopular leadership, news outlets reported.

Mr. Kishida has informed officials in his administration of his intention not to run in a governing-party election in September, according to Japanese news outlets, including the national broadcaster NHK and Kyodo News. The winner of that election will become the prime minister.

Mr. Kishida, who has been prime minister since 2021, will hold a news conference Wednesday morning, according to a spokesperson for his office.

This is a developing story.