A Chinese cruise operator has canceled its tours to Japan scheduled from late December to late January, apparently due to rising tensions between the two countries.

An agent in Japan was notified of the cancellations in November, a source familiar with the situation said Tuesday.

Bilateral relations have been deteriorating, resulting in the Chinese government to call for the country*s citizens to refrain from travel to Japan.

China*s Adora Cruises had planned to offer tours including two visits to Ishigaki Port in Okinawa Prefecture, and six visits to Nagasaki Port in Nagasaki Prefecture during the period of about one month from late December, according to the source.

Last month, the company canceled plans for its cruise ship to dock and disembark passengers at Miyako Island in Okinawa.

Adora Cruises plans to increase tours to South Korea and Southeast Asia instead of voyages to Japan.

※Only cruise ship tours of Chinese companies have been canceled, which is extremely unusual,§ the source said.