Japan said it will work with the United States and members of the Association of Southeast Asian Nations (ASEAN), among other members of the international community, to ensure a free and open Indo-Pacific after China blocked the path of a Philippine vessel in the West Philippine Sea.

In a statement, the Japanese foreign ministry believed China's latest action in the waters "is directly related to the peace and stability of the region," making it a legitimate concern for the international community, including Japan.

"Thus Japan opposes any unilateral attempts to change the status quo by force as well as any actions that increase tensions in the South China Sea," its Oct. 23 statement read.

On Oct. 22, China's Coast Guard vessel blocked the path of a Philippine boat on a resupply mission in the waters off Ayungin Shoal that led to a collision. 

Tokyo expressed its serious concern over the incident, which it described as a trigger for increased regional tension.

It lauded Manila "for having consistently complied with the Arbitral Tribunal’s award as to the disputes" as well as for showing commitment to the peaceful settlement of dispute despite Beijing's continued aggression. 

"The Government of Japan concurs with the Philippines’ long-standing objections to unlawful maritime claims, militarization, coercive activities and threat or use of force in the South China Sea," it said.

It said it will continue to cooperate with the US, its military ally, as well as the 10-member ASEAN "to protect free, open, and peaceful seas."

"Japan has consistently advocated upholding the rule of law at sea and re-emphasizes the importance of efforts toward a peaceful resolution of disputes based on international law," it added.