Japan's trade envoy Ryosei Akazawa was originally set to leave Tokyo for Washington on Thursday for a 10th round of talks.

Japan’s top trade negotiator abruptly cancelled a trip to Washington aimed at issuing a joint statement on a tariffs deal with the Trump administration, as a top government spokesman urged the U.S. side to speed up implementation of the agreement.

Trade envoy Ryosei Akazawa was scheduled to leave Tokyo for Washington on Thursday for a 10th round of talks, following up on the agreement announced on July 22 .

But Chief Cabinet Secretary Yoshimasa Hayashi told reporters some details required further consultations, so the trip was postponed.

In July, the two sides agreed on a 15-per-cent tax on imports of most Japanese goods, effective Aug. 1, down from an earlier 2

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