TOKYO (Kyodo) -- Japan's minister in charge of U.S. tariff negotiations Ryosei Akazawa will make a three-day trip to the United States from Wednesday for bilateral ministerial talks, the government said.

Economic revitalization minister Akazawa, a close aide to Prime Minister Shigeru Ishiba, will meet with U.S. Treasury Secretary Scott Bessent and U.S. Trade Representative Jamieson Greer in Washington, the Japanese government said Tuesday.

Chief Cabinet Secretary Yoshimasa Hayashi said at a press conference, "We will urge the U.S. side to review its tariff measures as we take a whole-of-government approach to producing results as soon as possible," adding the meeting is designed to "build trust" among the relevant ministers.

U.S. President Donald Trump has moved to slap tariffs on his nation's trading partners to rectify what he sees as imbalanced trade.

Japan, a close U.S. ally, was not spared, with higher import duties on cars, steel and aluminum, along with a so-called reciprocal tariff, already raising concerns about the potential fallout for the export-driven economy.

The launch of bilateral negotiations was agreed upon when Ishiba and Trump spoke by phone last week.

Ishiba has rejected the idea of making quick concessions to reach an agreement with Washington, though he has voiced reluctance to impose retaliatory tariffs on the United States. He has pledged to take steps to ease the negative impact of the U.S. trade measures.

But a supplementary budget for this fiscal year to fund economic support aimed at curbing the adverse effects of price hikes and the U.S. tariffs is unlikely to be submitted during the ongoing ordinary parliamentary session, a ruling lawmaker said Tuesday.

The government initially planned to begin full-scale discussions this month on compiling the extra budget for the year through March 2026 but has decided to hold off to gauge how U.S. tariff policies will develop, as they have already changed several times.

One example is Trump's abrupt announcement of a 90-day pause on most country-specific tariffs, which came around 13 hours after his reciprocal levies started to be implemented last Wednesday, rattling global financial markets.

The current 150-day Diet session is scheduled to end in late June unless an extension is approved.

Reserve funds for fiscal 2025 are expected to be used as the source of the envisioned economic steps, the lawmaker said.