Rubio's attendance at the Association of Southeast Asian Nations (ASEAN) gathering in Manila comes as the United States seeks to counter China's growing regional influence
Trump had on Tuesday said that a second round of talks with Iran could happen "over the next two days," and that the negotiations could be held again in Islamabad.
China and Japan are enmeshed in a spat over Takaichi's suggestion in November that Tokyo could intervene militarily in any attack on the self-ruled democratic island.
Doklam came into focus in 2017 following a border standoff between Indian and Chinese troops, while Cho La is among the sites where Indian and Chinese forces clashed in 1967.
