Japan’s Prime Minister Sanae Takaichi on Tuesday said she received a call from U.S. President Donald Trump following his conversation with Chinese President Xi Jinping, amid rising tensions over her remarks on Taiwan.

Speaking briefly at the prime minister’s office in Tokyo, Takaichi, Japan’s first female prime minister, said Trump “told me that he and I are extremely good friends and that I should call him any time.” She did not confirm whether the Taiwan issue was discussed.

Earlier this month, Takaichi angered China by suggesting Japan might respond militarily if China attempted to seize Taiwan, breaking with Japan’s long-standing policy of strategic ambiguity. She described a Chinese attack on the self-governing island as potentially “a survival-threatening situation” for Japan.

China reacted with strong criticism and economic measures. Chinese Foreign Minister Wang Yi said Takaichi “crossed a red line” and warned of a resolute response, urging the international community to prevent a resurgence of Japanese militarism.

Takaichi said Trump briefed her on the U.S.-China relationship following his call with Xi. They also discussed strengthening the Japan-U.S. alliance and regional development and challenges in the Indo-Pacific. “We confirmed close coordination between Japan and the United States,” she said, without offering further details due to diplomatic protocol.

Japan has resisted Chinese demands to retract Takaichi’s comment while reaffirming support for a peaceful resolution of the Taiwan Strait issue. China has canceled official meetings, suspended exchanges, and advised its citizens against travel to Japan.

The U.S. has maintained its position of strategic ambiguity on Taiwan, opposing the use of force to seize the island. While Trump has not publicly commented on Taiwan, China said he acknowledged the issue’s importance to Beijing.

The dispute has also reached the United Nations, with both countries rejecting each other’s accusations as “erroneous.”