An aquarium in Nagoya has begun a joint study with foreign research institutions to uncover the mechanism behind the migration of loggerhead sea turtles in the Pacific Ocean.

Little is known about the exact route and mechanism of the endangered loggerhead's migration from the coast of Japan, where the turtles hatch, to the west coast of North America.

In the project, 100 satellite-tagged juvenile loggerheads will be released into the ocean over four years. The first batch of 25 turtles, which were around the age of 2 years, was released into waters to the north of Hawaii last month.