Why did South Korea and Vietnam inherit the Chinese surname culture, but Japan didn't adopt the Chinese surname?

On this issue, I want to start with the history of the Three Kingdoms. First, let's look at Korea. The historically unified Korean Peninsula is a subordinate country of China. In other words, they pay tribute to China every year, and the memorial ceremony of their own emperor needs to be held by Emperor China. Only with the approval of the emperor China can the local emperor have prestige and gain the approval of his own people. In previous history, they were called Koguryo for a while. During my stay in China, there have been frictions and conflicts with Goguryeo, so there must be cultural exchanges. The Korean Peninsula is adjacent to the northeast of China, and cultural export is more convenient.

Look at Vietnam again. Vietnam has always belonged to the territory of China, but in the Ming Dynasty, due to the corruption and darkness of domestic political affairs and the encouragement of pagans, Vietnam became independent from China at the end of the Ming Dynasty. In other words, most of the Vietnamese blood came from China, so it is not surprising to inherit the Chinese surname. Moreover, the territory of Viet Nam is bordered by the southwest of China, and the cultural exchanges with the ethnic groups in the southwest of China are also relatively close.

Finally look at Japan. Japan's national harmony is absolutely dominant, and there are absolute rulers like Emperor China in every stage of Japanese history. Of course, this is not just the emperor. In fact, the power of the Japanese emperor has long been overhead. The real ruler of Japan is the shogunate. We are familiar with Kamakura shogunate, Muromachi shogunate and finally Tokugawa shogunate. They are all real rulers of Japan. Although we say that Japan inherited Tang Wenhua from China, it should be understood that this inheritance is not a complete copy, but still retains its distinctive features. As far as the Japanese are concerned, they have not surrendered to China. This country has always been good at learning from others and has no absolute loyalty and obedience. Absolute obedience is only obedience to Japan's absolute power. So, Japan didn't inherit? China last name? This is not surprising.