YOKOHAMA — Prime Minister Naoto Kan expressed gratitude Saturday to President Barack Obama for Washington's support during Japan's territorial tensions with China and Russia.

According to a Japanese official, Obama said during talks with Kan in Yokohama that China should adhere to international rules, alluding to its alleged restrictions on rare earth exports.

Later in the day, Kan managed to meet with Chinese President Hu Jintao in a hastily arranged meeting, while another meeting with Russian President Dmitry Medvedev was held as scheduled.