Japan
No, Manila is the capital of the Philippines; an island nation in the South China Sea, southeast of the continent of Asia.
There is Taiwan island, a bit higher than 23N latitude, but now it is not a nation. Taiwan is territory of China.
Taiwan is an island southeast of China. It formerly was known as Formosa.
China
The Socialist Republic of Vietnam is the easternmost country on the Indochina Peninsula in southeast Asia, and it is the 13th most populous nation in the world.
Shanghai, China is located in southeast China.
In China, southeast of Beijing
The country code +673 is for Brunei. This small Southeast Asian nation is located on the island of Borneo, bordered by Malaysia and the South China Sea. Brunei is known for its rich oil and natural gas reserves, contributing significantly to its economy.
Japan
The Government of Nationalist China is located on Taiwan the island.
formosa