The Pacific Ocean.
Pacfic ocean
This would technically be the Atlantic Ocean, though the entire megacontinent of Eurasia is in the way.The ocean that lies west of the US, and east of Japan, is of course the Pacific.
To the north lies Canada and to the south lies Mexico. The US is bordered by the Atlanic Ocean to the east and the Pacific Ocean to the west.
The Pacific Ocean. The Pacific Ocean is the world's largest ocean that stretches from the east coast of Japan to the west coast of California, US.
The ocean just west of Australia is the Indian Ocean.
The Atlantic Ocean lies west of Europe. It is the second largest ocean in the world.
The ocean west of Africa is the Atlantic Ocean. It separates the African continent from the Americas and is the second largest ocean in the world.
West Africa lies to the East of the Atlantic Ocean; East Africa lies to the West of the Indian Ocean.
The Pacific Ocean lies east of Japan and west of the United States.
The Atlantic Ocean
The Indian Ocean