The Japanese giant salamander is one of the world's largest amphibians and is native to Japan's freshwater rivers and streams.

During the Edo period, which lasted from the 17th to the mid-19th century, Japan was ruled by the Tokugawa shogunate and experienced a period of peace and stability.

Oita is a city located on the island of Kyushu, and is known for its hot springs, cuisine, and beautiful coastal scenery.