Lake Biwa

It is the largest lake in Japan, boasting a total area of 674 square km, and occupies about one-sixth of the area of Shiga Prefecture. Lake Oyamada, which was formed in the Ueno Basin in Mie Prefecture, is said to be the original form of Lake Biwa, and is believed to have moved to its current position over about 4 million years. The grebe, which is found in Lake Biwa all year round, is designated as a prefecture bird in Shiga Prefecture. In winter, many waterfowl such as ducks and swans fly in, which pleases the eyes of birdwatchers. It is also a rare lake where a number of endemic species such as loquat, nigorobuna, and isaza live, but in recent years, endemic species tend to gradually decrease due to the effects of reproduction of exotic species and changes in the natural environment.









