Share prices of major Republic of Korea entertainment companies that do business with China plunged on Friday, amid increasing market worries about the potential impact of Seoul's decision to deploy an advanced missile defense system.

S.M. Entertainment Co fell by 3.1 percent, while JYP Entertainment Corp dropped by 3.42 percent on the ROK's KOSDAQ stock exchange. CJ Corp was down 5.41 percent at the close.

Chinese video-streaming provider Youku Tudou Inc sent a notice on Sina Weibo on Thursday, saying a fan meeting for the drama Uncontrollably Fond, with the scheduled attendance of two ROK stars in Beijing on Saturday, was to be postponed due to "force majeure".