Diplomatic and economic ties between Japan and China strained after Japanese Prime Minister Sanae Takaichi stated in 2025 that Chinese military action against Taiwan could justify Japanese involvement.

From the articleJapan and the US kick off joint drills around islands as regional tensions riseAlso in Japan and the US kick off joint drills around islands as regional tensions rise, Japan and U.S. kick off one of their largest joint military drills defending Japan's southwestern islands as tensions with China rise | Fortune