BEIJING, June 29 (Reuters) - China added 20 Japanese entities on Monday to its export control list for dual-use items, preventing Chinese firms from selling to them without prior approval, citing Tokyo's ambitions for "remilitarisation".

Beijing slaps new restrictions on U.S. companies that are helping Washington build a domestic supply chain of critical minerals.

China blacklisted four of Japan's government defense research institutes and placed dozens more Japanese firms under tightened export restrictions Monday.

Tense calls between Anthropic's CEO and administration officials on Friday underscore how the White House is wrestling with advanced AI models.

New export control measures will be imposed on products linked to superhard materials, rare earth-related equipment and materials, and batteries, the Ministry of Commerce and the General Administration of Customs announced on Thursday.

Anthropic says US eased export curbs on Claude Fable 5/Mythos 5, restoring global access on Claude and cloud partners.