Japan is considering taking some measure against Russia, following President Vladimir Putin's visit to Etorofu Island, a senior Foreign Ministry official said Friday.Putin made his first trip to the Russian-controlled, Japanese-claimed island chain off Hokkaido as president or prime minister Thursday, drawing a backlash from Tokyo, which called it "totally unacceptable.""We are considering what step to take going forward," the official told reporters. An additional sanction is believed to be under consideration.The islands, known in Japan as the Northern Territories and by Russia as the Sou…READ FULL ARTICLE