Japan will Tuesday deploy an additional missile defence system on its northern island of Hokkaido, a defence ministry spokesman told AFP, days after North Korea launched a missile over the island."We are deploying a PAC-3 system at about noon" to a base of the nation's Ground Self-Defence Force in the southern tip of Hokkaido, said Kensaku Mizuseki.According to local officials, Japan has already deployed the Patriot Advanced Capability-3 missile defence system to another part o