2. Attract China's attention, clear the way for the United States and Japan to seize the Diaoyu Islands in June+February, 5438, and gain Japan's support.

3. Better control North Korea and open the door to China's northeast border.

4. Better stabilize your sphere of influence in East Asia.

5. Win prestige for the Six-Party Talks and defeat the purpose of winning the attention of North Korea.

6. Test the reaction of Russia and China, restore their strength, test whether Sino-US relations are rigid, and strive for a win-win situation.

7. Interfere with the diplomacy of Korea and North Korea, develop hegemonism according to the trend, increase its own strength, gain the support of South Korea's economy and politics, restore its economic strength, accelerate the appreciation of RMB, promote the development of its own economic strength, and carry out economic stimulus.

Japan: 1. Good relations and good trade with Korea.

2. Prove yourself to be a powerful country.

Japan wants to control the peninsula, grasp the priority, improve its position in the world and improve its relations with the United States.