English is spoken by people in the all over the world as a mother tongue or as a second language. People who speak English as a second language, they can�ft speak it English like native speakers who speak as a mother tongue. If he or she lives for a long time in that place where people speak English as a mother tongue, they will speak very well as native speakers. The other case, the people who has their own mother tongues and speak English as a second languages, they can�ft speak exactly the same with native speakers even they study and try hard to speak English as native speakers. Why it is happen? Everybody can speak one language at least. People speak different languages, and every languages are different. For examples we have different grammar structures, words, and pronunciations. That's why people can't speak as native speakers. They already became accustomed to their mother tongues. I will research about this problem, mainly the difference pronunciations of English with Korean and Japanese. Also, I can find which language is more similar with English. This paper will be about comparison of Korean English and Japanese English on the basis of their pronunciation system