"This is a significant evolution of this relationship,but there is no reason for that to cause any concern elsewhere in the region,"Mr Morrison said."I think it adds to the stability of the region,which is a good thing."
But Chinese government mouthpieceThe Global Times said the agreement was not about defence cooperation because Japan and Australia were"geographically distant from each other".
"This agreement clearly targets China and echoes the US'Indo-Pacific Strategy. The agreement further accelerates the confrontational atmosphere in the Asia-Pacific region and negatively affects each country's understanding of the regional situation,"the newspaper said in an editorial.
"What's worse,it provides a new lever for the US to divide Asia. Since modern times,it is Japan that had invaded China and Southeast Asia,not that other way round. China did not expand its military to Australia,either."
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Australia and Japan will now look to increase their military cooperation in a number of key geostrategic flashpoints in the region,including the disputed South China Sea where Beijing has been steadily militarising by establishing artificial islands.
In a joint statement,Mr Morrison and Mr Suga expressed"serious concerns about the situation in the South China Sea and reconfirmed their strong opposition to any coercive or unilateral attempts to change the status quo and thereby increase tensions in the region".