( CNN) Japan has actually lodged an official demonstration versus Russia's identifying of 5 unoccupied islands in the challenged Kuril chain, north of Japan's Hokkaido island.

“Suchremovals violate our nation's position as well as is exceptionally regrettable,” informed Japan's principal Cabinet assistant Yoshihide Suga throughout an interview Tuesday.

The56 -island Kuril chain has actually been an aching area in Japan-Russiaconnections for the past 72 years.