The Oshima Strait is a bit of water. 
The Oshima Strait is in Japan. 
Many boats go through the water. Five ferry lines cross the strait. These boats start at one port. They carry people to other lands.
People use these boats to travel. It is a very busy place. It is a fun way to see the sea.
The Ōshima Strait is in Japan. 

The Ōshima Strait is a special strip of water in Japan. 
Measuring the strait is a simple task. It stretches from the west to the east. The distance from one side to the other is 17.5 miles. This is also known as 28.2 kilometers. 
Many boats use this path every single day. There are five different ferry lines that cross the water. 
Most of these boat trips start at the same place. They all depart from the Setonami port. This port is located on Amami Ōshima island. 
There are even more places you can reach by boat. One ferry line goes to Tokunoshima island. It stops at the Hetono port. The final ferry line goes to Naze port. 
The Ōshima Strait is a significant body of water located in Japan. 
To understand the scale of the strait, we can look at its dimensions. The distance from the westernmost side to the easternmost side is measurable. It measures 17.5 miles across the water. In metric units, this distance is 28.2 kilometers. 
Transportation is a major function of this strait. Because the islands are separated by water, boats are necessary. There are five distinct ferry lines that operate through the strait. These ferries are very popular with the local people. They provide a reliable way to move between different locations. Without these lines, traveling between the islands would be much more difficult. The ferry system makes the strait a busy and useful maritime route.
Most of these ferry services share a common starting point. They all depart from the Setonami port. This port is located on the island of Amami Ōshima. 
One specific ferry line connects Amami Ōshima to Kakeromajima. This route travels from the Setonami port to the Seso port. Another service travels to the Setouchi Town Ferry. A third line provides access to Ukejima island. This specific route ends at the Okeamuro port. 
Beyond the immediate neighbors, the ferry lines reach even further. One ferry line travels to Tokunoshima island. This boat arrives at the Hetono port. The final ferry line listed in the records goes to Naze port. 
In summary, the Ōshima Strait is more than just a strip of water. It is a central part of the Amami Guntō National Park. The 17.5-mile span facilitates essential travel for the region. Through the five ferry lines, it connects Amami Ōshima to Kakeromajima and beyond. From Seso port to Hetono port, these routes are vital. The strait remains a key geographic and social link in Japan.
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