Japan says has strong concerns over North Korea's 'provocative acts'

TOKYO (Reuters) - Japan has strong concerns over North Korea's firing of shots across the border at South Korea, the government's chief spokesman said on Friday. "North Korea should exercise self-restraint in making provocative acts," Chief Cabinet Secretary Yoshihide Suga told a news conference. South Korea fired a barrage of artillery rounds into North Korea on Thursday after the North shelled across the border to protest against anti-Pyongyang propaganda broadcasts by Seoul. (Reporting by Kaori Kaneko; Editing by Dean Yates)