Since the era of enlightenment, lots of Japanese-style Chinese words were incorporated into Korean language. We examined the first appearance of their use, and change in forms and meanings of the 78 Japanese-style Chinese words in Korean language. By investigating the parlance of the age of 70-89 Koreans, we could comment on the possibilities of the decimation of some Japanese style words. We found that there were some changes of form and structure in the Japanese- style Chinese words as they were incorporated into the Korean language; and some of their meanings changed. We also found that most of the old Koreans know and use Japanese-style Chinese words, while they didn’t recognize the words were Japanese nor had the emotion of refuse to use them. Finally, it was anticipated that 11 words are still likely to remain in use and 5 words are in the course of disappearing.