FILE PHOTO: A police officer stands guard near Japan and South Korea national flags at hotel, where South Korean embassy in Japan is holding the reception to mark the 50th anniversary of normalisation of ties between Seoul and Tokyo, in Tokyo June 22, 2015. East Asian neighbours South Korea and Japan marked the 50th anniversary of diplomatic ties on Monday with a push to mend relations strained for years by a territorial dispute and a feud over Japan’s wartime past. REUTERS/Toru Hanai