Korean influence in Japanese culture refers to the impact of continental Asian influences ... Gradually; the Jōmon culture was supplanted throughout Japan by the Yayoi culture at the beginning of the invasion in 1592.
Korea built European-style transport and communication networks throughout the country. That facilitated Japanese exploitation, but modernization had little or no effect on the Korean people. Japan used the modernization of Korea to improve colonial control, serving Japanese trade and consolidating control of Korea.
The correct answer is that: There was a gradual opening of Japanese culture to other influences.