美国总统特朗普：日本同意购买价值数十亿美元的军事装备。

Group 1 - The core point of the article is that Japan has agreed to purchase military equipment from the United States worth several billion dollars [1] Group 2 - The agreement signifies a strengthening of defense ties between the United States and Japan [1] - This military equipment purchase is part of Japan's broader strategy to enhance its defense capabilities amid regional security concerns [1]