inland sea; enclosed sea; inlet
Refers to a sea largely surrounded by land, such as the Caspian Sea or the Seto Inland Sea. Used in geographical contexts.
Caspian Sea
Specifically refers to the Caspian Sea, the world's largest inland body of water. Often used with the cross-reference カスピ海.
See also: カスピ海
An inland sea is a sea surrounded by continents.
The Caspian Sea (裏海) is located on the border between Europe and Asia.