Japan's top tariff negotiator, Ryosei Akazawa, said on Saturday he planned to visit Washington next week to hold further ministerial-level talks with the U.S.

TOKYO — Japan’s Prime Minister Shigeru Ishiba faces an increasingly uphill battle in Sunday’s upper house election, and a loss could worsen political instability at a time of daunting challenges, such as rising prices and high U.S. tariffs.