the inland sea
There's no ocean between Shikiku and Honshu because there is no place called Shikiku. The body of water between the islands of Shikoku and Honshu is called the Seto Inland Sea.
The body of water which separates the island state of Tasmania from mainland Australia is Bass Strait.
Japan is considered an island because it is surrounded on all sides by water and is considered a part of the continent of Asia.
Foveaux Strait
Long Island Sound
Cook Strait separates the North and South Islands of New Zealand.Fouveaux Strait separates the South Island and Stewart Island.
The body of water which separates the island state of Tasmania from mainland Australia is Bass Strait.
Japan has 6,852 islands in total as of 1988, of which 426 are inhabited. This figure may include disputed areas and tidal islands and artificial islands, but all islands are at least 0.1 square kilometres (0.039 sq mi) in size. the smallest most well know island is Shikoku with 19,000 square kilometers
Mozambique channel
The bay that separates them is called Baffin Bay. Baffin is the 5th largest island in the world by land area located on the border of Canada
long island sound
isthmus