美国防部人士：日本防卫费未能充分增加

Core Viewpoint - The U.S. Department of Defense expresses strong dissatisfaction with Japan's slow response in increasing defense spending compared to other allies like South Korea, Australia, Germany, and Canada [2][4]. Group 1: U.S. Defense Department's Perspective - U.S. officials have noted that Japan has long expressed concerns about the deteriorating security environment but has cited constitutional limitations as a reason for not providing more substantial support [4]. - The U.S. Defense Department has been negotiating with allies to enhance their defense capabilities since the second Trump administration, highlighting a general expectation for Japan to increase its defense spending [4][5]. - Japan aims to raise its defense spending to 2% of GDP by 2027, but U.S. officials believe this is still insufficient given the current security landscape [4]. Group 2: Comparison with Other Allies - The U.S. has praised other allies for aligning with its defense spending expectations, contrasting this with Japan's perceived reluctance to take similar steps [2][4]. - There is an indication that negotiations with South Korea's new government are progressing, while Japan's attitude remains negative [4]. Group 3: Expectations for Japan - U.S. officials expect Japan to play a more active role in its own defense and collective self-defense, indicating a shift in how Japan is treated compared to other nations [5].