TOKYO: Japan is to deploy surface-to-air missiles in central Tokyo in readiness for North Korea’s planned rocket launch, its defence minister said Monday.

The siting of an anti-missile battery in the densely packed capital city would be in addition to facilities on the southern island chain of Okinawa, Naoki Tanaka told lawmakers.

“We are working on procedures to deploy the Patriot in the Tokyo metropolitan area, acting on precedent,” Tanaka told upper house members, referring to the PAC-3 surface-to-air missile defence system.

“We are also preparing to deploy the Patriot in the Nansei (southwestern) islands including Okinawa,” as the second stage of North Korea’s rocket is expected to fly over Japan’s southernmost island chain, Tanaka added.

The nuclear-armed North has announced it will launch a rocket in mid-April to put a satellite into orbit, a move the United States, South Korea and other nations see as a pretext for a long-range missile test banned by the UN.

Tanaka said on Friday he was readying Japan’s missile defence systems to shoot down the rocket if it looked set to fall on the country, a move similar to measures Japan took in 2009 before Pyongyang’s last long-range rocket launch.

In 2009, Japan ordered missile-defence preparations, including the siting of one of its PAC-3 systems at Ichigaya, next to the defence ministry building in central Tokyo.

The preparations by Japan, regularly the target of North Korean barbs, come as world leaders including US President Barack Obama are meeting in Seoul for a summit officially focused on nuclear terrorism.