Russia said Monday it had built new barracks for troops on a disputed chain of islands near Japan and would build more facilities for armored vehicles, a move likely to anger Tokyo after it urged Moscow to reduce its military activity there.

The announcement, from the Ministry of Defense, said Moscow planned to shift troops into four housing complexes on two of the four disputed islands, known as the Southern Kurils in Russia and the Northern Territories in Japan, next week.

The news came after the Kremlin said Prime Minister Shinzo Abe might visit Russia on Jan. 21 as the two countries step up a push to defuse the territorial dispute to allow them to sign a World War II peace treaty, something the disagreement over the Pacific islands has long prevented.