BEIJING, Nov. 17 (Xinhua) -- China is highly concerned about the recent extreme and threatening remarks in Japan, foreign ministry spokesperson Mao Ning told a daily press briefing here on Monday.

In response to a query about the Chinese government advising citizens to avoid traveling to Japan citing security concerns, Mao said for quite some time, there have been multiple criminal cases against Chinese citizens in Japan, and there have been some extreme and threatening remarks against China from Japanese rightists and on the internet.

"China is highly concerned about this. It is completely reasonable for relevant departments to issue reminders," said Mao.