Nanjing, located in the east of China and the lower reaches of the Yangtze River, is an important transportation hub in China. Located on the west coast of the Pacific Ocean, Japan is an arc island country extending from northeast to southwest, including Hokkaido, Honshu, Shikoku, Kyushu and more than 6,800 other small islands.
Therefore, the straight line distance between Nanjing and Japan is far away, so it can't be considered close.