This study is the survey on the usage and the influence factors of 78 words of Japanese style Chinese words remaining in Korean language, targeting Korean people in their 10s and 20s. As a result, 50percent of 10s use the 24 Japanese style Chinese words, and 50percent of 20s use 46 Japanese style Chinese words. It can be seen that the 10s who mainly spend lots of time in limited space with their peers don’t use a lot of words, but they can use more words in their 20s. And most people in their 10s and 20s do not recognize these words as Japanese even use them without reluctance. However, there are a few words that are rarely used in practice. These words are not deeply rooted in the daily life language of 10s and 20s and are likely to be replaced by Korean native words.