I am sure that there are multiple Asian rivers that flow into the Black Sea. The Longest such river is the Kızılırmak River, located entirely in the Asian part of the Republic of Turkey.
The River Danube.
The Mediterranean Sea flows into the Nile.
The Caspian Sea
The Jordan river flows into the Dead sea, but the Dead is actually a lake and has no outlet to a sea such as the Mediterranean.
The Dniester River flows into the Black Sea
The river Volga flows out into the Caspian Sea.
The Jordan River flows into the Dead Sea.
It is the Mackensie River.
A river usually flows eventually into the sea.
The river water flows into the sea.
The Dnieper River flows through to Red Sea
River Nile flows into the Mediterranean sea!