Chrysanthemum and Sword and Bushido are recognized as the earliest Japanese imports in the world.
Those who like the history of Japanese royal family can look at The Rise and Fall of Japanese Royal Family, Biography of Filial Piety and Biography of Japanese Emperor (this is basically about Japanese history, especially Biography of Filial Piety, which introduces the history of Japanese female emperors in detail);
The first novel is, of course, the first realistic novel Genji Tale in the world. If you want to further deepen this work, you must read The Daughter Genji Loves, Tales of Genji, White Works and Tales of Genji. In addition, there are novels such as Tale of Pingjia, Tale of Ise, Tale of Bamboo, Rashomon, and House of Vanity.
LZ If you want to further study the history of Sino-Japanese exchanges, you can look for Han and Tang Culture and Ancient Japanese Culture (this book is more academic) and Sakura and Samurai (this book is more vivid and worth reading).
There are too many books about the Japanese invaders, only recommend Ogre Cave, A Record of the Japanese Invaders' War, Dong Diary, Dong Diary Illustrated, Kanto Massacre, Collection of Cases of Japanese Poisonous War, 1800 Cases of Japanese Poisonous War and Testimony of Survivors of Nanjing Massacre.
China's civil claim against Japan is "untried".