Australian Prime Minister Anthony Albanese signed a strategic partnership agreement with Philippine President Ferdinand Marcos Jr. during his trip to Manila, the first visit by an Australian leader in 20 years.
"Australia is working with our partners including the Philippines to shape a region where sovereignty is upheld,"Albanese said in a joint press conference with Marcos after holding bilateral talks.
Marcos said their countries'close ties were"terribly important".
The Philippines last month held military exercises near the South China Sea with Australia, its second-largest partner in defense security. It is also one of only two bilateral partners with whom the Philippines has a Status of Visiting Forces Agreement, which allows two countries to undertake joint exercises, high-level visits, dialogues and exchanges.
Australia has discussed pursuing joint navy patrols in the resource-rich waterway.
Albanese threw his support behind a 2016 arbitral ruling on the South China Sea that invalidated China's expansive claims in the strategic waterway where about $3 trillion worth of ship-borne trade passes annually.
"Australia supports the 2016 South China Sea arbitral award. That is final and binding. And it is important that it be upheld going forward," Albanese said.
Albanese confirmed on Thursday he will visit China later this year, the first visit by an Australian leader since 2016.