J. G. Ballard - Empire Of The Sun [Kindle azw3]

The novel recounts the story of a young British boy, Jamie Graham (named after Ballard's two first names, "James Graham"), who lives with his parents in Shanghai. After the Pearl Harbor attack, Japan occupies the Shanghai International Settlement, and in the following chaos Jim becomes separated from his parents.

He spends some time in abandoned mansions, living on remnants of packaged food. Having exhausted the food supplies, he decides to try to surrender to the Japanese Army. After many attempts, he finally succeeds and is interned in the Lunghua Civilian Assembly Center.

Although the Japanese are "officially" the enemies, Jim identifies partly with them, both because he adores the pilots with their splendid machines and because he feels that Lunghua is still a comparatively safer place for him.

Towards the end of the war, with the Japanese army collapsing, the food supply runs short. Jim barely survives, with people around him starving to death. The camp prisoners are forced upon a march to Nantao, with many dying along the route. Jim then leaves the march and is saved from starvation by air drops from American Bombers. Jim returns to Lunghua camp and finds Dr. Ransome there, soon returning to his pre-war residence with his parents.