The US has approved the sale of missiles worth $133.3 million to Japan, saying it will serve to reinforce the Asian country's defence against the ballistic missile threat from North Korea.

The consignment, which must still be approved by the US Congress, includes the sales of four missiles for the SM-3 interceptor Block IIA system and four MK29 launchers, in addition to the provision of technical and operational support by the US, Efe news reported.