Japanese people all have compound surnames. Where did they come from?

Japanese names are basically written in Chinese characters. Hiragana characters are also available now. The format is surname+first name, and the surname is generally one to five words. There are no fixed rules for names, so there are many words in Japanese names, and names are usually pronounced through training. In other words, the meaning of this word is pronounced with words in Japanese national language, so there is no difference between Chinese pronunciation and Japanese pronunciation.

Korean names are basically written in Korean, and only Chinese characters are used in formal occasions. The format is surname+surname, and surname is generally one word. There are also a few compound surnames, named as one or two words, which are the same as the habits of Han people. Pronunciation is phonetic pronunciation, that is, according to Chinese pronunciation. So it is similar to Chinese, because when Koreans name their names, they all come from people who know Chinese, and their names are pronounced in Chinese characters.

For example, Japanese: Nonobunaga Oda, Hideyoshi Toyotomi and Chinese are very different in pronunciation, and generally have many syllables.

Koreans: Ahn Jae Wook, Ji-seob So, etc. Some Chinese pronunciations are not the same as they are now, but they are pronounced in ancient Chinese, so they are still pronounced.

Generally, the translation of Japanese names is literal translation, so you know that Japanese still write Chinese characters in Japanese, except traditional Japanese characters. But the Korean name you know is not necessarily correct, because the Korean name is translated according to the Chinese pronunciation, which is not necessarily the same as the original word when he gave the name. Only he knows this word, unless he reveals that translation can only be transliteration, and most famous people, such as the president of South Korea, have translated from this word.