TOKYO - Japanese right-wing activists are likely to launch more protests against China and South Korea, police said on Tuesday.

The activists could commit serious crimes, including terror attacks on senior politicians and foreign embassies, Japan's National Police Agency said in an annual report.

The report said police are keeping vigilance on growing protests by the rightists against China and South Korea, adding the protests may continue next year.

Police said the protests were triggered by territorial disputes with China and South Korea.

Prolonged economic stagnancy and political instability has stimulated nationalism in the past decade.