Japan's Prime Minister Shinzo Abe (R) speaks to media after attending a meeting of Security Council of Japan at his official residence in Tokyo February 12, 2013 after reports of North Korea's possible nuclear test. Seismic activities detected at around 0300 GMT in North Korea may be the result of a nuclear test, Japan's top government spokesman said on Tuesday. REUTERS/Issei Kato (JAPAN - Tags: POLITICS MILITARY)