Russian President Vladimir Putin met in the Kremlin Monday with Japanese Prime Minister Shinzo Abe, the first top-level Russo-Japanese summit in almost a decade.

The two wrestled for hours with the problem that has stymied Russian and Japanese leaders for almost 70 years: how to find a mutually acceptable and hopefully profitable way to finally end World War II.

"The leaders of both countries agreed that the situation where, 67 years after the conclusion of [World War II], we have still been unable to conclude a bilateral peace treaty, looks abnormal," said a joint statement at the meeting's end Monday....