3) Historically, China has a close relationship with ASEAN countries, and a large number of immigrants from China moved into the region. However, at present,

According to the analysis of reading pictures:

(1) Japan's economy is developed, but it is poor in resources and highly dependent on foreign countries. Malacca Strait is a sea passage connecting the Indian Ocean and the Pacific Ocean, and it is the only way for Japan to transport oil, import raw materials and export products. Therefore, Japan calls the Straits of Malacca "the lifeline of the sea".

(2) Southeast Asia is located at the junction of Asia-Europe plate, Indian Ocean plate and Pacific plate, and its crust is active, so there are many volcanoes and earthquakes.

(3) Historically, China has a close relationship with ASEAN countries, and a large number of China immigrants have moved into this area, which is the area with the largest distribution of Chinese at present. The country with the highest proportion of Chinese in ASEAN 10 countries is Singapore.

(4) Singapore is strategically located at the eastern mouth of the Straits of Malacca. Its climate type is a typical tropical rainforest climate, with flowers blooming in all seasons and picturesque scenery, and it is known as the "garden city".

So the answer is:

(1) Japan is poor in resources, and its domestic market is small, and its products depend on the international market. Malacca Strait is a sea passage connecting the Indian Ocean and the Pacific Ocean, and it is the only way for Japan to transport oil, import raw materials and export products. (2) three; Volcanoes and earthquakes; (3)D； (4) Malacca; Tropical rain forest.