North Korea fired a submarine-launched missile on Wednesday that flew about 500 km (311 miles) towards Japan, a show of improving technological capability for the isolated country that has conducted a series of launches in defiance of UN sanctions.

Having the ability to fire a missile from a submarine could help North Korea evade a new anti-missile system planned for South Korea and pose a threat even if nuclear-armed North Korea’s land-based arsenal was destroyed, experts said.

The ballistic missile was fired at around 5:30 a.m. (2030 GMT) from near the coastal city of Sinpo, where a submarine base is located, officials at South Korea’s Joint Chiefs of Staff and the Defence Ministry told Reuters. […]