The US has spoken with its accomplices, including Japan and the Netherlands, to fix chip-related commodities to China, Jake Sullivan, the White House national security counselor, said on Monday.

In an effort to halt Beijing’s technological and military advancements, the Biden administration issued a series of restrictions in October to prevent China from purchasing certain semiconductor chips produced anywhere in the world with U.S. equipment.

Bloomberg News, citing people familiar with the situation, reported that the two nations had agreed in principle to join the U.S.-led technology export control program. Sullivan’s remarks came after the report.

When asked about the report, Japanese Trade Minister Yasutoshi Nishimura stated that he had a phone conversation with U.S. Commerce Secretary Gina Raimondo about cooperation in export control but declined to elaborate.

“I cannot go into details as they are diplomatic exchanges, but Japan has been implementing its export control strictly, based on the foreign exchange and foreign trade law in the spirit of international co-operation,” he told reporters.

Bloomberg stated that, in addition to a few gear suppliers from the United States, Tokyo Electron Ltd. (8035.T) in Japan and ASML Holding NV (ASML.AS) in the Netherlands were the two essential players required to make the sanctions work. Their governments’ adoption of the restrictions marked a significant milestone.

It also said that the new curbs might be announced in the coming weeks.

Due to the fact that the issue involved the laws of each nation, Tokyo Electron, according to a spokesperson, was unable to respond.

“We intend to keep a close eye on the situation constantly and deal with it appropriately,” the spokesperson added.