Korea Strait

The Korea Strait is a big sea passage.

It sits in East Asia. It is between Korea and Japan.

An island named Tsushima sits in the middle. This island splits the sea into two parts.

The water can be warm. A warm current flows through the sea.

Many big ships sail here. Boats carry people and goods between lands.

People have used this sea for a long time. It is a very busy place.

The Korea Strait is a sea passage in East Asia. It sits between the Korean Peninsula and the islands of Japan.

This sea connects the East China Sea to the Sea of Japan.

Tsushima Island sits in the middle of the strait. This island splits the water into two parts. One part is the Western Channel. The other part is the Tsushima Strait. The Western Channel is narrow and deep. It can reach 227 meters deep.

A warm current flows through these waters. This is called the Tsushima Current. It comes from the Japanese islands.

Many ships use this sea to move goods. Large ferries also carry people between lands. They run from Busan in South Korea to cities in Japan.

History has happened here too. Long ago, Mongol invaders used the sea to reach Japan. In 1950, a naval battle happened during the Korean War. Some people have even thought about building an undersea tunnel. This would connect Japan and Korea under the water.

The Korea Strait is a busy sea passage in East Asia. It sits between the Korean Peninsula and the islands of Japan.

This water connects the East China Sea and the Yellow Sea to the Sea of Japan. To the north lies the southern coast of Korea. To the south are the Japanese islands of Kyūshū and Honshū. The strait is not just one big open space. Tsushima Island sits right in the middle of it. This island splits the water into two separate parts. One part is the Western Channel. The other part is the Tsushima Strait, also called the Eastern Channel.

The water in the strait has many different features. The Western Channel is narrower than the Eastern Channel. It is also much deeper, reaching up to 227 meters. On average, the whole strait is about 90 to 100 meters deep. A warm branch of the Kuroshio Current flows through here. People sometimes call this the Tsushima Current. It starts near the Japanese islands and moves through the Sea of Japan. The water can change a lot in its saltiness. This is because of low-salinity water coming from Korea and China.

Many people and things move through these waters every day. Many international shipping lanes pass through the strait. These ships carry goods to many important ports. Passenger ferries also travel many routes across the sea. Some ferries run from Busan and Geoje in South Korea. They go to Japanese cities like Fukuoka, Tsushima, Shimonoseki, and Hiroshima. Other ferries connect Jeju Island to the Korean mainland. Both Japan and South Korea allow ships to pass through freely. This helps keep trade moving between the two countries.

History has left many marks on this sea. In the 6th century, the Baekje people brought Buddhism to Japan across these waters. Much later, in 1274 and 1281, Mongol and Korean fleets tried to invade Japan. These fleets caused great damage to Tsushima Island. In 1905, a big naval battle happened between Japan and Russia. This was called the Battle of Tsushima. More recently, the Battle of Korea Strait happened in June 1950. This was one of the first naval battles of the Korean War. It took place near Busan when a North Korean ship was sunk.

Looking to the future, people have big ideas for this area. Some have talked about building a Japan–Korea Undersea Tunnel. This would be a way to connect the two countries under the sea. It would be similar to the Channel Tunnel under the English Channel. This tunnel would link France and the United Kingdom. People have discussed this idea for many decades. Even now, the strait remains a vital link in East Asia. It connects many lands, people, and histories together.

The Korea Strait is a vital maritime passage located in East Asia. It sits between the Korean Peninsula to the north and the Japanese islands to the south. Specifically, the strait is bounded by the southern coast of Korea and the southwestern Japanese islands of Kyūshū and Honshū. This body of water serves as a major connection point for several large seas. It links the East China Sea and the Yellow Sea to the Sea of Japan. This connection makes the strait a central part of the northwest Pacific Ocean region.

The physical structure of the strait is divided by Tsushima Island. This island splits the water into two distinct sections. The first section is known as the Western Channel. The second section is called the Tsushima Strait, or the Eastern Channel. These two parts have different physical characteristics. The Western Channel is narrower than the Eastern Channel. However, the Western Channel is also deeper, reaching depths of up to 227 meters. On average, the entire strait maintains a depth of about 90 to 100 meters.

Ocean currents play a major role in the environment of the strait. A branch of the Kuroshio Current flows through these waters. This warm branch is often referred to as the Tsushima Current. It originates near the Japanese islands and passes through the Sea of Japan. The current eventually flows into the northern Pacific Ocean or the Sea of Okhotsk. The water characteristics vary significantly throughout the passage. This variation occurs because of low-salinity waters coming from the southeast coasts of China and Korea.

Economically, the Korea Strait is a critical corridor for global trade. Numerous international shipping lanes pass through the strait every day. These lanes carry heavy traffic toward the major ports of southern South Korea. To support this trade, both South Korea and Japan allow free passage through the strait. Japan has even restricted its territorial waters to three nautical miles instead of the usual twelve. This decision reportedly allows United States Navy warships and submarines to transit without violating Japanese laws regarding nuclear weapons. Passenger ferries also provide essential connections between many different locations.

Commercial ferry routes connect several major cities and islands. Ferries run from South Korean locations like Busan and Geoje to Japanese ports. These Japanese destinations include Fukuoka, Tsushima, Shimonoseki, and Hiroshima. Other ferries connect Tsushima Island to Fukuoka. There are also routes linking Jeju Island with the Korean mainland. Some ferries even carry passengers between Japanese ports and cities in China. These routes demonstrate how the strait functions as a busy highway for people and goods.

The history of the strait is marked by significant cultural and military events. During the Pleistocene glacial cycles, the strait was much narrower. At times, the Japanese islands may have been connected to the Eurasian Continent. During these times, the Sea of Japan may have been a frozen inner lake. In the 6th century, the Baekje people used the strait to transmit Mahāyāna Buddhism to Japan. Later, in 1274 and 1281, Mongol and Korean fleets attempted to invade Japan. These invasions caused severe damage to Tsushima Island. In 1905, the Battle of Tsushima took place between the Japanese and Russian navies. More recently, the Battle of Korea Strait occurred in June 1950 during the Korean War. This naval battle resulted in a South Korean victory when a North Korean transport was sunk.

Looking toward the future, engineers and leaders have discussed new ways to connect these lands. One major proposal is the Japan–Korea Undersea Tunnel. This project would create a physical link between Japan and Korea beneath the sea. This idea is similar to the Channel Tunnel that connects France and the United Kingdom. While people have discussed this possibility for many decades, it remains a topic of debate. The strait continues to be a place where geography, history, and modern economy meet.