Japan will indefinitely postpone retaliatory measures against recently imposed U.S. steel import tariffs to give Washington time to exempt more Japanese items, the trade ministry said Thursday.

A 100 percent tariff on certain U.S. steel products was to be imposed Tuesday.

Takeo Hiranuma, minister of the economy, trade and industry, made the decision following an hourlong phone conversation with U.S. Trade Representative Robert Zoellick.