The closed-door meetings were held after the US government implemented different tariffs than the Japanese side had announced.
Participants questioned when the United States would revise its tariffs to reflect its agreement with Japan.
Akazawa responded that the timing is unclear, according to Jun Azumi, chairman of the House of Representatives' Budget Committee, who spoke at a press conference later in the day.
Azumi said he instructed the ruling and opposition parties to consider holding a budget committee meeting with Prime Minister Shigeru Ishiba on the matter, adding that the meeting is expected to take place in September.
[Copyright The Jiji Press, Ltd.]