To the east of Korea is the Sea of Japan and along Iceland country known as and its capital

To the east of Korea is the Sea of Japan and a long island country known as Japan and its capital is Tokyo.

Explanation:

The sea of Japan is the body of water between China, Russia, North Korea, and South Korea on the west and Japan on the east, almost completely cut off from the Pacific Ocean that covers Japan’s east shore.

Japan is a country consisting of one long island, Honshu, the largest of the five main islands, and more than 6000 more small islands in the archipelago.

The capital of Japan is Tokyo, the city with is the most populated city in the world and home to around 37 and a half million people. Tokyo is located on the Pacific coast and the largest island of Japan, Honshu.

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